/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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:45:56,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:45:56,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:45:56,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:45:56,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:45:56,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:45:56,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:45:56,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:45:56,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:45:56,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:45:56,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:45:56,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:45:56,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:45:56,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:45:56,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:45:56,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:45:56,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:45:56,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:45:56,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:45:56,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:45:56,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:45:56,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:45:56,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:45:56,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:45:56,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:45:56,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:45:56,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:45:56,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:45:56,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:45:56,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:45:56,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:45:56,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:45:56,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:45:56,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:45:56,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:45:56,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:45:56,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:45:56,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:45:56,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:45:57,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:45:57,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:45:57,001 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:45:57,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:45:57,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:45:57,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:45:57,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:45:57,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:45:57,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:45:57,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:45:57,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:45:57,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:45:57,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:45:57,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:45:57,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:45:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:57,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:45:57,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:45:57,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:45:57,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:45:57,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:45:57,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:45:57,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:45:57,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:45:57,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:45:57,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:45:57,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:45:57,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:45:57,443 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:45:57,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:45:57,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbec5d44b/77508d7133b548dabc5940e9b46e2787/FLAG111c74cfa [2020-12-22 09:45:58,716 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:45:58,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:45:58,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbec5d44b/77508d7133b548dabc5940e9b46e2787/FLAG111c74cfa [2020-12-22 09:45:59,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbec5d44b/77508d7133b548dabc5940e9b46e2787 [2020-12-22 09:45:59,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:59,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:59,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:59,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:59,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:59,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:59" (1/1) ... [2020-12-22 09:45:59,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71da7c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:59, skipping insertion in model container [2020-12-22 09:45:59,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:59" (1/1) ... [2020-12-22 09:45:59,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:59,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:59,642 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c[8688,8701] [2020-12-22 09:45:59,735 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c[16193,16206] [2020-12-22 09:46:00,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:46:00,777 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:46:00,853 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c[8688,8701] [2020-12-22 09:46:00,870 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c[16193,16206] [2020-12-22 09:46:01,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:46:01,551 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:46:01,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01 WrapperNode [2020-12-22 09:46:01,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:46:01,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:46:01,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:46:01,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:46:01,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:01,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:46:02,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:46:02,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:46:02,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:46:02,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... [2020-12-22 09:46:02,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:46:02,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:46:02,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:46:02,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:46:02,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:46:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:46:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:46:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:46:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:46:08,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:46:08,108 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:46:08,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:08 BoogieIcfgContainer [2020-12-22 09:46:08,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:46:08,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:46:08,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:46:08,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:46:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:59" (1/3) ... [2020-12-22 09:46:08,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1799599c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:08, skipping insertion in model container [2020-12-22 09:46:08,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:01" (2/3) ... [2020-12-22 09:46:08,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1799599c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:08, skipping insertion in model container [2020-12-22 09:46:08,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:08" (3/3) ... [2020-12-22 09:46:08,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label09.c [2020-12-22 09:46:08,134 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:46:08,140 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:46:08,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:46:08,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:46:08,216 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:46:08,217 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:46:08,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:46:08,217 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:46:08,217 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:46:08,217 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:46:08,217 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:46:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:46:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:46:08,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:08,271 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] [2020-12-22 09:46:08,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:46:08,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:08,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889930959] [2020-12-22 09:46:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:08,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889930959] [2020-12-22 09:46:08,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:08,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:46:08,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749864488] [2020-12-22 09:46:08,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:46:08,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:46:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:46:08,633 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:46:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:08,746 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:46:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:46:08,747 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:46:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:08,774 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:46:08,775 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:46:08,784 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 09:46:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:46:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:46:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:46:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:46:08,904 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:46:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:08,904 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:46:08,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:46:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:46:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:46:08,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:08,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:08,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:46:08,907 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:46:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725434164] [2020-12-22 09:46:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:09,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725434164] [2020-12-22 09:46:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308091865] [2020-12-22 09:46:09,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:46:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:46:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:09,085 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:46:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:09,352 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:46:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:09,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:46:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:09,362 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:46:09,362 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:46:09,364 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 09:46:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:46:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:46:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:46:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:46:09,416 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:46:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:09,416 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:46:09,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:46:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:46:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:09,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:09,426 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] [2020-12-22 09:46:09,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:46:09,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:46:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:09,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021532633] [2020-12-22 09:46:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:09,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021532633] [2020-12-22 09:46:09,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:09,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509028499] [2020-12-22 09:46:09,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:09,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:09,595 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:46:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:09,650 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:46:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:09,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:09,658 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:46:09,659 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:46:09,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:46:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:46:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:46:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:46:09,705 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:46:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:09,706 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:46:09,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:46:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:09,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:09,709 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] [2020-12-22 09:46:09,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:46:09,710 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:46:09,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:09,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780486053] [2020-12-22 09:46:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:09,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780486053] [2020-12-22 09:46:09,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:09,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:09,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322456829] [2020-12-22 09:46:09,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:09,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:09,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:09,847 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:46:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:09,897 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:46:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:09,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:09,903 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:46:09,904 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:46:09,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:46:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:46:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:46:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:46:09,942 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:46:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:09,943 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:46:09,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:46:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:09,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:09,944 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] [2020-12-22 09:46:09,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:46:09,944 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:46:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:09,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662431317] [2020-12-22 09:46:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662431317] [2020-12-22 09:46:10,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:10,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:10,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681562709] [2020-12-22 09:46:10,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:10,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:10,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:10,067 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:46:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:10,133 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:46:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:10,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:10,143 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:46:10,143 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:46:10,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:46:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:46:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:46:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:46:10,196 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:46:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:10,196 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:46:10,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:46:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:10,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:10,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:10,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:46:10,200 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:10,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:46:10,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:10,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835398207] [2020-12-22 09:46:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:10,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835398207] [2020-12-22 09:46:10,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:10,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:10,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681337660] [2020-12-22 09:46:10,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:10,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:10,324 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:46:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:10,435 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:46:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:10,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:46:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:10,446 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:46:10,446 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:46:10,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:46:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:46:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:46:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:46:10,494 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:46:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:10,496 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:46:10,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:46:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:46:10,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:10,497 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] [2020-12-22 09:46:10,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:46:10,502 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:46:10,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:10,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501191420] [2020-12-22 09:46:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:10,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501191420] [2020-12-22 09:46:10,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:10,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:10,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570272563] [2020-12-22 09:46:10,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:10,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:10,613 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:46:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:10,919 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:46:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:46:10,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:46:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:10,947 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:46:10,947 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:46:10,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:46:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:46:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:46:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:46:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:46:11,075 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:46:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:11,075 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:46:11,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:46:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:11,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:11,076 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] [2020-12-22 09:46:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:46:11,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:46:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:11,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736154962] [2020-12-22 09:46:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:11,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736154962] [2020-12-22 09:46:11,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:11,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:11,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558266965] [2020-12-22 09:46:11,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:11,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:11,140 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:46:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:11,248 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:46:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:11,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:46:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:11,262 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:46:11,262 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:46:11,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:46:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:46:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:46:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:46:11,365 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2020-12-22 09:46:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:11,366 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2020-12-22 09:46:11,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:46:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:46:11,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:11,368 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] [2020-12-22 09:46:11,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:46:11,368 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:46:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:11,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605832890] [2020-12-22 09:46:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:11,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605832890] [2020-12-22 09:46:11,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:11,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:11,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536841638] [2020-12-22 09:46:11,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:11,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:11,573 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:46:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:11,820 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:46:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:11,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:46:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:11,837 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:46:11,837 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:46:11,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:46:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:46:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:46:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:46:12,044 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:46:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:12,045 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:46:12,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:46:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:12,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:12,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:12,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:46:12,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:46:12,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:12,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581175026] [2020-12-22 09:46:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:12,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581175026] [2020-12-22 09:46:12,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:12,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:12,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687698871] [2020-12-22 09:46:12,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:12,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:12,164 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:46:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:12,382 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:46:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:12,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:46:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:12,395 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:46:12,395 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:46:12,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:46:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:46:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:46:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:46:12,521 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:46:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:12,521 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:46:12,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:46:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:12,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:12,523 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] [2020-12-22 09:46:12,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:46:12,523 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:46:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:12,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598458478] [2020-12-22 09:46:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:12,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598458478] [2020-12-22 09:46:12,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:12,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:12,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085576092] [2020-12-22 09:46:12,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:12,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:12,613 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:46:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:12,851 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:46:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:12,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:46:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:12,867 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:46:12,867 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:46:12,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:46:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:46:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:46:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:46:13,025 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:46:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:13,025 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:46:13,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:46:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:46:13,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:13,026 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] [2020-12-22 09:46:13,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:46:13,027 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:46:13,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:13,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177869231] [2020-12-22 09:46:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:13,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177869231] [2020-12-22 09:46:13,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:13,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:13,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420289117] [2020-12-22 09:46:13,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:46:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:13,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:46:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:13,134 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:46:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:13,417 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:46:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:46:13,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:46:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:13,435 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:46:13,436 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:46:13,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:46:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:46:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:46:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:46:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:46:13,712 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:46:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:13,713 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:46:13,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:46:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:46:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:46:13,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:13,721 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] [2020-12-22 09:46:13,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:46:13,723 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1457269204, now seen corresponding path program 1 times [2020-12-22 09:46:13,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:13,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413942247] [2020-12-22 09:46:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:13,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413942247] [2020-12-22 09:46:13,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:13,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873582299] [2020-12-22 09:46:13,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:46:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:46:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:46:13,883 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:46:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:25,186 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:46:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:46:25,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:46:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:25,206 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:46:25,206 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:46:25,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:46:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:46:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:46:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:46:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5673 transitions. [2020-12-22 09:46:25,378 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5673 transitions. Word has length 67 [2020-12-22 09:46:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:25,378 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5673 transitions. [2020-12-22 09:46:25,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:46:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5673 transitions. [2020-12-22 09:46:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:25,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:25,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:25,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:46:25,381 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:46:25,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:25,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604351418] [2020-12-22 09:46:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:46:25,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604351418] [2020-12-22 09:46:25,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:25,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:25,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68018956] [2020-12-22 09:46:25,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:25,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:25,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:25,495 INFO L87 Difference]: Start difference. First operand 3785 states and 5673 transitions. Second operand 6 states. [2020-12-22 09:46:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:26,079 INFO L93 Difference]: Finished difference Result 10091 states and 14442 transitions. [2020-12-22 09:46:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:26,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:26,124 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:46:26,124 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:46:26,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:46:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:46:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:46:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7737 transitions. [2020-12-22 09:46:26,458 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7737 transitions. Word has length 79 [2020-12-22 09:46:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:26,458 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7737 transitions. [2020-12-22 09:46:26,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7737 transitions. [2020-12-22 09:46:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:26,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:26,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:46:26,462 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:46:26,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:26,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622733066] [2020-12-22 09:46:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:46:26,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622733066] [2020-12-22 09:46:26,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:26,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:26,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580533006] [2020-12-22 09:46:26,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:26,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:26,578 INFO L87 Difference]: Start difference. First operand 5281 states and 7737 transitions. Second operand 6 states. [2020-12-22 09:46:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:27,307 INFO L93 Difference]: Finished difference Result 11587 states and 16506 transitions. [2020-12-22 09:46:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:27,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:27,332 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:46:27,332 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:46:27,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:46:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:46:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:46:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10813 transitions. [2020-12-22 09:46:27,782 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10813 transitions. Word has length 79 [2020-12-22 09:46:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:27,782 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10813 transitions. [2020-12-22 09:46:27,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10813 transitions. [2020-12-22 09:46:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:27,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:27,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:27,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:46:27,785 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:46:27,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:27,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080207780] [2020-12-22 09:46:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:46:27,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080207780] [2020-12-22 09:46:27,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:27,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:27,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897138788] [2020-12-22 09:46:27,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:27,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:27,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:27,872 INFO L87 Difference]: Start difference. First operand 7529 states and 10813 transitions. Second operand 6 states. [2020-12-22 09:46:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:28,612 INFO L93 Difference]: Finished difference Result 13083 states and 18570 transitions. [2020-12-22 09:46:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:28,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:28,639 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:46:28,640 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:46:28,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:46:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:46:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:46:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12877 transitions. [2020-12-22 09:46:29,230 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12877 transitions. Word has length 79 [2020-12-22 09:46:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:29,231 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12877 transitions. [2020-12-22 09:46:29,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12877 transitions. [2020-12-22 09:46:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:46:29,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:29,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:29,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:46:29,235 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:46:29,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:29,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753914793] [2020-12-22 09:46:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:46:29,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753914793] [2020-12-22 09:46:29,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:29,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:46:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769115651] [2020-12-22 09:46:29,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:29,324 INFO L87 Difference]: Start difference. First operand 9025 states and 12877 transitions. Second operand 6 states. [2020-12-22 09:46:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:30,052 INFO L93 Difference]: Finished difference Result 13699 states and 19434 transitions. [2020-12-22 09:46:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:46:30,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:46:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:30,081 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:46:30,081 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:46:30,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:46:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:46:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:46:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:46:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14349 transitions. [2020-12-22 09:46:30,685 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14349 transitions. Word has length 79 [2020-12-22 09:46:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:30,685 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14349 transitions. [2020-12-22 09:46:30,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:46:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14349 transitions. [2020-12-22 09:46:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:46:30,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:30,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:30,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:46:30,689 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:30,690 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:46:30,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:30,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141407087] [2020-12-22 09:46:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141407087] [2020-12-22 09:46:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380128658] [2020-12-22 09:46:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:46:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:31,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:31,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:46:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893036579] [2020-12-22 09:46:31,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:46:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:46:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:46:31,625 INFO L87 Difference]: Start difference. First operand 10081 states and 14349 transitions. Second operand 18 states. [2020-12-22 09:46:31,756 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:34,061 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:35,146 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:35,791 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:37,349 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:38,774 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:41,205 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:41,797 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:41,967 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:42,831 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:46:43,083 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:43,348 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:44,067 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:46:45,439 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:46,208 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:46,352 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:46,720 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:50,951 INFO L93 Difference]: Finished difference Result 86701 states and 118444 transitions. [2020-12-22 09:46:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:46:50,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:46:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:51,113 INFO L225 Difference]: With dead ends: 86701 [2020-12-22 09:46:51,114 INFO L226 Difference]: Without dead ends: 78907 [2020-12-22 09:46:51,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:46:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78907 states. [2020-12-22 09:46:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78907 to 36697. [2020-12-22 09:46:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36697 states. [2020-12-22 09:46:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36697 states to 36697 states and 50867 transitions. [2020-12-22 09:46:55,099 INFO L78 Accepts]: Start accepts. Automaton has 36697 states and 50867 transitions. Word has length 80 [2020-12-22 09:46:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:55,099 INFO L481 AbstractCegarLoop]: Abstraction has 36697 states and 50867 transitions. [2020-12-22 09:46:55,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 36697 states and 50867 transitions. [2020-12-22 09:46:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:55,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:55,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:46:55,320 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:55,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:55,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149091461] [2020-12-22 09:46:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149091461] [2020-12-22 09:46:55,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:55,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:55,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006551430] [2020-12-22 09:46:55,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:55,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:55,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:55,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:55,395 INFO L87 Difference]: Start difference. First operand 36697 states and 50867 transitions. Second operand 3 states. [2020-12-22 09:46:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:58,134 INFO L93 Difference]: Finished difference Result 71109 states and 98151 transitions. [2020-12-22 09:46:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:58,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:58,208 INFO L225 Difference]: With dead ends: 71109 [2020-12-22 09:46:58,209 INFO L226 Difference]: Without dead ends: 36699 [2020-12-22 09:46:58,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36699 states. [2020-12-22 09:47:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36699 to 35737. [2020-12-22 09:47:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35737 states. [2020-12-22 09:47:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35737 states to 35737 states and 48827 transitions. [2020-12-22 09:47:01,601 INFO L78 Accepts]: Start accepts. Automaton has 35737 states and 48827 transitions. Word has length 81 [2020-12-22 09:47:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:01,601 INFO L481 AbstractCegarLoop]: Abstraction has 35737 states and 48827 transitions. [2020-12-22 09:47:01,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 35737 states and 48827 transitions. [2020-12-22 09:47:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:01,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:01,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:01,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:47:01,607 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:47:01,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:01,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467674461] [2020-12-22 09:47:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467674461] [2020-12-22 09:47:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045975077] [2020-12-22 09:47:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:47:02,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:02,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:02,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:02,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:47:02,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168055147] [2020-12-22 09:47:02,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:47:02,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:47:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:47:02,744 INFO L87 Difference]: Start difference. First operand 35737 states and 48827 transitions. Second operand 19 states. [2020-12-22 09:47:02,903 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:47:03,046 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:47:03,207 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:47:03,357 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:47:03,517 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:47:04,049 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:47:05,285 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:05,758 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:07,270 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-12-22 09:47:10,331 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:10,642 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:10,784 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:11,204 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:47:11,847 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:12,104 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:47:12,469 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:12,868 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:13,506 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:13,910 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:14,099 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:47:14,535 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:47:16,240 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:16,689 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:17,078 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:47:22,643 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:23,122 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:23,300 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:47:23,615 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:47:24,065 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:24,360 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:47:25,206 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:47:25,390 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:34,684 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:35,327 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:39,401 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:40,051 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:50,567 INFO L93 Difference]: Finished difference Result 372820 states and 496097 transitions. [2020-12-22 09:47:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:47:50,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:47:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:51,308 INFO L225 Difference]: With dead ends: 372820 [2020-12-22 09:47:51,309 INFO L226 Difference]: Without dead ends: 339370 [2020-12-22 09:47:51,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:47:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339370 states. [2020-12-22 09:48:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339370 to 167235. [2020-12-22 09:48:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167235 states. [2020-12-22 09:48:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167235 states to 167235 states and 224947 transitions. [2020-12-22 09:48:10,640 INFO L78 Accepts]: Start accepts. Automaton has 167235 states and 224947 transitions. Word has length 81 [2020-12-22 09:48:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:10,640 INFO L481 AbstractCegarLoop]: Abstraction has 167235 states and 224947 transitions. [2020-12-22 09:48:10,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:48:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 167235 states and 224947 transitions. [2020-12-22 09:48:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:10,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:10,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:10,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:10,864 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:10,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:48:10,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:10,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778365246] [2020-12-22 09:48:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:11,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778365246] [2020-12-22 09:48:11,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:11,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330159358] [2020-12-22 09:48:11,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:11,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:11,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:11,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:11,246 INFO L87 Difference]: Start difference. First operand 167235 states and 224947 transitions. Second operand 3 states. [2020-12-22 09:48:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:20,926 INFO L93 Difference]: Finished difference Result 258799 states and 347463 transitions. [2020-12-22 09:48:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:20,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:21,114 INFO L225 Difference]: With dead ends: 258799 [2020-12-22 09:48:21,115 INFO L226 Difference]: Without dead ends: 93851 [2020-12-22 09:48:21,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93851 states. [2020-12-22 09:48:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93851 to 93849. [2020-12-22 09:48:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-22 09:48:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 124403 transitions. [2020-12-22 09:48:30,578 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 124403 transitions. Word has length 81 [2020-12-22 09:48:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,578 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 124403 transitions. [2020-12-22 09:48:30,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 124403 transitions. [2020-12-22 09:48:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:30,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:30,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:48:30,583 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:48:30,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323808280] [2020-12-22 09:48:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323808280] [2020-12-22 09:48:30,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:30,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388759357] [2020-12-22 09:48:30,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:30,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:30,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,634 INFO L87 Difference]: Start difference. First operand 93849 states and 124403 transitions. Second operand 3 states. [2020-12-22 09:48:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:35,993 INFO L93 Difference]: Finished difference Result 135830 states and 180271 transitions. [2020-12-22 09:48:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:35,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:36,061 INFO L225 Difference]: With dead ends: 135830 [2020-12-22 09:48:36,061 INFO L226 Difference]: Without dead ends: 44268 [2020-12-22 09:48:36,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44268 states. [2020-12-22 09:48:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44268 to 44242. [2020-12-22 09:48:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44242 states. [2020-12-22 09:48:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44242 states to 44242 states and 58631 transitions. [2020-12-22 09:48:40,462 INFO L78 Accepts]: Start accepts. Automaton has 44242 states and 58631 transitions. Word has length 81 [2020-12-22 09:48:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:40,462 INFO L481 AbstractCegarLoop]: Abstraction has 44242 states and 58631 transitions. [2020-12-22 09:48:40,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44242 states and 58631 transitions. [2020-12-22 09:48:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:40,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:40,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:40,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:48:40,467 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:48:40,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:40,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591036767] [2020-12-22 09:48:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:48:40,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591036767] [2020-12-22 09:48:40,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:40,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657838592] [2020-12-22 09:48:40,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:40,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:40,562 INFO L87 Difference]: Start difference. First operand 44242 states and 58631 transitions. Second operand 6 states. [2020-12-22 09:48:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,797 INFO L93 Difference]: Finished difference Result 67564 states and 89201 transitions. [2020-12-22 09:48:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:43,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,830 INFO L225 Difference]: With dead ends: 67564 [2020-12-22 09:48:43,830 INFO L226 Difference]: Without dead ends: 25646 [2020-12-22 09:48:43,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25646 states. [2020-12-22 09:48:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25646 to 25646. [2020-12-22 09:48:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25646 states. [2020-12-22 09:48:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 33796 transitions. [2020-12-22 09:48:46,451 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 33796 transitions. Word has length 81 [2020-12-22 09:48:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:46,451 INFO L481 AbstractCegarLoop]: Abstraction has 25646 states and 33796 transitions. [2020-12-22 09:48:46,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 33796 transitions. [2020-12-22 09:48:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:46,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:46,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:46,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:48:46,454 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:48:46,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:46,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333767436] [2020-12-22 09:48:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:48:46,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333767436] [2020-12-22 09:48:46,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:46,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761006787] [2020-12-22 09:48:46,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:46,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:46,566 INFO L87 Difference]: Start difference. First operand 25646 states and 33796 transitions. Second operand 6 states. [2020-12-22 09:48:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:48,915 INFO L93 Difference]: Finished difference Result 44216 states and 57931 transitions. [2020-12-22 09:48:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:48,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:48,938 INFO L225 Difference]: With dead ends: 44216 [2020-12-22 09:48:48,938 INFO L226 Difference]: Without dead ends: 20876 [2020-12-22 09:48:48,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2020-12-22 09:48:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 20876. [2020-12-22 09:48:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-12-22 09:48:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 27474 transitions. [2020-12-22 09:48:51,030 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 27474 transitions. Word has length 81 [2020-12-22 09:48:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,030 INFO L481 AbstractCegarLoop]: Abstraction has 20876 states and 27474 transitions. [2020-12-22 09:48:51,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 27474 transitions. [2020-12-22 09:48:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:51,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:48:51,033 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:48:51,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984772354] [2020-12-22 09:48:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984772354] [2020-12-22 09:48:51,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:51,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257221190] [2020-12-22 09:48:51,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:51,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,089 INFO L87 Difference]: Start difference. First operand 20876 states and 27474 transitions. Second operand 3 states. [2020-12-22 09:48:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:52,265 INFO L93 Difference]: Finished difference Result 30252 states and 39444 transitions. [2020-12-22 09:48:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:52,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:48:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:52,278 INFO L225 Difference]: With dead ends: 30252 [2020-12-22 09:48:52,278 INFO L226 Difference]: Without dead ends: 11682 [2020-12-22 09:48:52,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2020-12-22 09:48:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 11680. [2020-12-22 09:48:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-12-22 09:48:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 15396 transitions. [2020-12-22 09:48:53,271 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 15396 transitions. Word has length 82 [2020-12-22 09:48:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:53,271 INFO L481 AbstractCegarLoop]: Abstraction has 11680 states and 15396 transitions. [2020-12-22 09:48:53,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 15396 transitions. [2020-12-22 09:48:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:53,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:53,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:53,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:48:53,273 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:48:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:53,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329795158] [2020-12-22 09:48:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:53,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329795158] [2020-12-22 09:48:53,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172697432] [2020-12-22 09:48:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:54,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:48:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:55,202 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:48:55,382 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:55,934 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:56,173 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:56,532 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:48:56,799 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:57,123 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:57,143 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:57,655 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:58,018 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:58,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:58,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:58,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:58,086 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:58,088 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:58,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:58,095 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:58,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:59,167 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:59,659 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:49:00,141 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:49:00,161 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:00,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:03,765 WARN L197 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:49:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:04,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:04,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:49:04,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275630197] [2020-12-22 09:49:04,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:49:04,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:49:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:49:04,380 INFO L87 Difference]: Start difference. First operand 11680 states and 15396 transitions. Second operand 39 states. [2020-12-22 09:49:05,923 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-12-22 09:49:06,176 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:49:06,400 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:49:06,676 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:49:07,048 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:49:07,601 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:49:08,000 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:49:08,393 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:49:08,819 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:49:09,288 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:49:09,825 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:49:10,331 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:49:10,877 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:49:11,464 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:49:12,200 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:49:13,035 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:49:14,501 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:49:15,278 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:49:16,591 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:49:17,515 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:49:18,269 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:49:18,846 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:49:19,084 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:49:19,838 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:49:20,360 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:49:20,828 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:49:21,207 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:23,034 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:49:23,307 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:49:23,807 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:25,229 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:49:25,985 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:49:26,523 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:49:26,975 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:49:28,131 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:49:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:31,293 INFO L93 Difference]: Finished difference Result 25221 states and 32025 transitions. [2020-12-22 09:49:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:49:31,294 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:49:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:31,318 INFO L225 Difference]: With dead ends: 25221 [2020-12-22 09:49:31,318 INFO L226 Difference]: Without dead ends: 21811 [2020-12-22 09:49:31,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:49:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21811 states. [2020-12-22 09:49:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21811 to 11132. [2020-12-22 09:49:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11132 states. [2020-12-22 09:49:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 14668 transitions. [2020-12-22 09:49:32,493 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 14668 transitions. Word has length 83 [2020-12-22 09:49:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:32,493 INFO L481 AbstractCegarLoop]: Abstraction has 11132 states and 14668 transitions. [2020-12-22 09:49:32,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:49:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 14668 transitions. [2020-12-22 09:49:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:32,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:32,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:32,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:49:32,696 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:49:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:32,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103752893] [2020-12-22 09:49:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,217 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:49:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103752893] [2020-12-22 09:49:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152347584] [2020-12-22 09:49:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:49:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:34,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:35,045 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:49:35,436 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:49:35,672 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:49:36,024 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:49:36,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:36,421 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:49:36,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:36,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:36,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:37,116 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:49:37,374 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:37,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:37,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:37,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:49:38,209 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:49:38,539 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:49:38,968 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:39,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:39,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:49:39,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869720709] [2020-12-22 09:49:39,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:49:39,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:49:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:39,138 INFO L87 Difference]: Start difference. First operand 11132 states and 14668 transitions. Second operand 37 states. [2020-12-22 09:49:40,349 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-12-22 09:49:40,610 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:49:40,873 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:49:41,179 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:49:41,501 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:49:41,862 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:49:42,324 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:49:42,862 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:49:43,410 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:49:44,027 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:49:44,580 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:49:45,193 WARN L197 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:49:45,848 WARN L197 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:49:46,663 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:49:47,484 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74