/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/product-lines/email_spec27_product13.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:27:16,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:27:16,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:27:16,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:27:16,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:27:16,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:27:16,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:27:16,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:27:16,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:27:16,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:27:16,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:27:16,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:27:16,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:27:16,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:27:16,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:27:16,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:27:16,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:27:16,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:27:16,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:27:16,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:27:16,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:27:16,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:27:16,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:27:16,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:27:16,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:27:16,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:27:16,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:27:16,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:27:16,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:27:16,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:27:16,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:27:16,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:27:16,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:27:16,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:27:16,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:27:16,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:27:16,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:27:16,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:27:16,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:27:16,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:27:16,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:27:16,794 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:27:16,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:27:16,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:27:16,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:27:16,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:27:16,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:27:16,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:27:16,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:27:16,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:27:16,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:27:16,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:27:16,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:27:16,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:27:16,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:27:16,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:27:16,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:27:16,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:27:16,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:27:16,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:27:16,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:27:16,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:27:16,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:27:17,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:27:17,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:27:17,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:27:17,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:27:17,241 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:27:17,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec27_product13.cil.c [2020-12-22 06:27:17,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb1899d7/f6369c80fa364804afbc45c78b987d5e/FLAGaab45a387 [2020-12-22 06:27:18,168 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:27:18,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product13.cil.c [2020-12-22 06:27:18,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb1899d7/f6369c80fa364804afbc45c78b987d5e/FLAGaab45a387 [2020-12-22 06:27:18,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb1899d7/f6369c80fa364804afbc45c78b987d5e [2020-12-22 06:27:18,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:27:18,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:27:18,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:18,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:27:18,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:27:18,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:18" (1/1) ... [2020-12-22 06:27:18,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be50a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:18, skipping insertion in model container [2020-12-22 06:27:18,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:18" (1/1) ... [2020-12-22 06:27:18,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:27:18,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:27:19,124 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/product-lines/email_spec27_product13.cil.c[61363,61376] [2020-12-22 06:27:19,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:19,142 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:27:19,260 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/product-lines/email_spec27_product13.cil.c[61363,61376] [2020-12-22 06:27:19,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:19,355 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:27:19,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19 WrapperNode [2020-12-22 06:27:19,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:19,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:19,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:27:19,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:27:19,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:19,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:27:19,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:27:19,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:27:19,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (1/1) ... [2020-12-22 06:27:19,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:27:19,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:27:19,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:27:19,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:27:19,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (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 06:27:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:27:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:27:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:27:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:27:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:27:21,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:27:21,945 INFO L299 CfgBuilder]: Removed 239 assume(true) statements. [2020-12-22 06:27:21,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:21 BoogieIcfgContainer [2020-12-22 06:27:21,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:27:21,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:27:21,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:27:21,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:27:21,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:27:18" (1/3) ... [2020-12-22 06:27:21,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f414a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:21, skipping insertion in model container [2020-12-22 06:27:21,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:19" (2/3) ... [2020-12-22 06:27:21,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f414a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:21, skipping insertion in model container [2020-12-22 06:27:21,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:21" (3/3) ... [2020-12-22 06:27:21,959 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product13.cil.c [2020-12-22 06:27:21,967 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:27:21,973 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:27:21,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:27:22,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:27:22,029 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:27:22,029 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:27:22,029 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:27:22,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:27:22,030 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:27:22,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:27:22,030 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:27:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states. [2020-12-22 06:27:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:27:22,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:22,076 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] [2020-12-22 06:27:22,076 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -194309687, now seen corresponding path program 1 times [2020-12-22 06:27:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:22,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372734120] [2020-12-22 06:27:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:22,536 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 06:27:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372734120] [2020-12-22 06:27:22,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:22,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:22,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154988260] [2020-12-22 06:27:22,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:22,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:22,568 INFO L87 Difference]: Start difference. First operand 401 states. Second operand 3 states. [2020-12-22 06:27:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:22,766 INFO L93 Difference]: Finished difference Result 1168 states and 2063 transitions. [2020-12-22 06:27:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:22,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 06:27:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:22,796 INFO L225 Difference]: With dead ends: 1168 [2020-12-22 06:27:22,797 INFO L226 Difference]: Without dead ends: 772 [2020-12-22 06:27:22,803 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 06:27:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-12-22 06:27:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 395. [2020-12-22 06:27:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 691 transitions. [2020-12-22 06:27:22,915 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 691 transitions. Word has length 48 [2020-12-22 06:27:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:22,915 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 691 transitions. [2020-12-22 06:27:22,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 691 transitions. [2020-12-22 06:27:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:27:22,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:22,927 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] [2020-12-22 06:27:22,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:27:22,927 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1702143685, now seen corresponding path program 1 times [2020-12-22 06:27:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:22,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49379375] [2020-12-22 06:27:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:23,163 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 06:27:23,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49379375] [2020-12-22 06:27:23,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:23,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338739674] [2020-12-22 06:27:23,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:23,169 INFO L87 Difference]: Start difference. First operand 395 states and 691 transitions. Second operand 5 states. [2020-12-22 06:27:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:23,425 INFO L93 Difference]: Finished difference Result 1134 states and 1989 transitions. [2020-12-22 06:27:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:27:23,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 06:27:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:23,434 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 06:27:23,434 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 06:27:23,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 06:27:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 06:27:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 395. [2020-12-22 06:27:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 690 transitions. [2020-12-22 06:27:23,498 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 690 transitions. Word has length 50 [2020-12-22 06:27:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:23,498 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 690 transitions. [2020-12-22 06:27:23,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 690 transitions. [2020-12-22 06:27:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:27:23,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:23,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:23,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:27:23,504 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash 182544200, now seen corresponding path program 1 times [2020-12-22 06:27:23,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:23,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370775772] [2020-12-22 06:27:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:23,669 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 06:27:23,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370775772] [2020-12-22 06:27:23,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:23,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:23,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709140568] [2020-12-22 06:27:23,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:23,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:23,678 INFO L87 Difference]: Start difference. First operand 395 states and 690 transitions. Second operand 3 states. [2020-12-22 06:27:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:23,727 INFO L93 Difference]: Finished difference Result 772 states and 1354 transitions. [2020-12-22 06:27:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:23,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 06:27:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:23,731 INFO L225 Difference]: With dead ends: 772 [2020-12-22 06:27:23,731 INFO L226 Difference]: Without dead ends: 400 [2020-12-22 06:27:23,733 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 06:27:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-12-22 06:27:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 395. [2020-12-22 06:27:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 689 transitions. [2020-12-22 06:27:23,757 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 689 transitions. Word has length 51 [2020-12-22 06:27:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:23,764 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 689 transitions. [2020-12-22 06:27:23,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 689 transitions. [2020-12-22 06:27:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:27:23,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:23,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:23,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:27:23,767 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash -379903346, now seen corresponding path program 1 times [2020-12-22 06:27:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:23,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551560129] [2020-12-22 06:27:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551560129] [2020-12-22 06:27:23,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:23,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538327624] [2020-12-22 06:27:23,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:23,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:23,853 INFO L87 Difference]: Start difference. First operand 395 states and 689 transitions. Second operand 3 states. [2020-12-22 06:27:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:23,893 INFO L93 Difference]: Finished difference Result 782 states and 1367 transitions. [2020-12-22 06:27:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:23,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 06:27:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:23,897 INFO L225 Difference]: With dead ends: 782 [2020-12-22 06:27:23,897 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 06:27:23,898 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 06:27:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 06:27:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2020-12-22 06:27:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 687 transitions. [2020-12-22 06:27:23,915 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 687 transitions. Word has length 52 [2020-12-22 06:27:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:23,917 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 687 transitions. [2020-12-22 06:27:23,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 687 transitions. [2020-12-22 06:27:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:27:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:23,919 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] [2020-12-22 06:27:23,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:27:23,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 525658595, now seen corresponding path program 1 times [2020-12-22 06:27:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:23,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555746876] [2020-12-22 06:27:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:24,053 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 06:27:24,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555746876] [2020-12-22 06:27:24,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:24,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324066235] [2020-12-22 06:27:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:24,057 INFO L87 Difference]: Start difference. First operand 395 states and 687 transitions. Second operand 5 states. [2020-12-22 06:27:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:24,267 INFO L93 Difference]: Finished difference Result 1124 states and 1969 transitions. [2020-12-22 06:27:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:24,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 06:27:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:24,273 INFO L225 Difference]: With dead ends: 1124 [2020-12-22 06:27:24,273 INFO L226 Difference]: Without dead ends: 756 [2020-12-22 06:27:24,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-12-22 06:27:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 395. [2020-12-22 06:27:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 686 transitions. [2020-12-22 06:27:24,306 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 686 transitions. Word has length 53 [2020-12-22 06:27:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:24,306 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 686 transitions. [2020-12-22 06:27:24,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 686 transitions. [2020-12-22 06:27:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:27:24,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:24,310 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 06:27:24,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:27:24,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:24,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1855605702, now seen corresponding path program 1 times [2020-12-22 06:27:24,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:24,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587378884] [2020-12-22 06:27:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:24,405 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 06:27:24,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587378884] [2020-12-22 06:27:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514408946] [2020-12-22 06:27:24,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:24,409 INFO L87 Difference]: Start difference. First operand 395 states and 686 transitions. Second operand 5 states. [2020-12-22 06:27:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:24,585 INFO L93 Difference]: Finished difference Result 1129 states and 1974 transitions. [2020-12-22 06:27:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:24,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:27:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:24,591 INFO L225 Difference]: With dead ends: 1129 [2020-12-22 06:27:24,591 INFO L226 Difference]: Without dead ends: 761 [2020-12-22 06:27:24,592 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 06:27:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-12-22 06:27:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2020-12-22 06:27:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:27:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 685 transitions. [2020-12-22 06:27:24,622 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 685 transitions. Word has length 54 [2020-12-22 06:27:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:24,623 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 685 transitions. [2020-12-22 06:27:24,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 685 transitions. [2020-12-22 06:27:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:27:24,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:24,624 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 06:27:24,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:27:24,626 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 966785758, now seen corresponding path program 1 times [2020-12-22 06:27:24,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:24,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651035306] [2020-12-22 06:27:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:24,732 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 06:27:24,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651035306] [2020-12-22 06:27:24,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:24,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195403044] [2020-12-22 06:27:24,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:24,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:24,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:24,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:24,735 INFO L87 Difference]: Start difference. First operand 395 states and 685 transitions. Second operand 3 states. [2020-12-22 06:27:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:24,765 INFO L93 Difference]: Finished difference Result 556 states and 953 transitions. [2020-12-22 06:27:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:24,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:27:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:24,769 INFO L225 Difference]: With dead ends: 556 [2020-12-22 06:27:24,769 INFO L226 Difference]: Without dead ends: 398 [2020-12-22 06:27:24,770 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 06:27:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-22 06:27:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2020-12-22 06:27:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-22 06:27:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 687 transitions. [2020-12-22 06:27:24,796 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 687 transitions. Word has length 55 [2020-12-22 06:27:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:24,798 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 687 transitions. [2020-12-22 06:27:24,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 687 transitions. [2020-12-22 06:27:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:27:24,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:24,800 INFO L422 BasicCegarLoop]: trace histogram [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 06:27:24,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:27:24,800 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 137653724, now seen corresponding path program 1 times [2020-12-22 06:27:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:24,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932106041] [2020-12-22 06:27:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932106041] [2020-12-22 06:27:24,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:24,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:24,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621218279] [2020-12-22 06:27:24,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:24,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:24,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:24,915 INFO L87 Difference]: Start difference. First operand 397 states and 687 transitions. Second operand 3 states. [2020-12-22 06:27:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:24,970 INFO L93 Difference]: Finished difference Result 1077 states and 1885 transitions. [2020-12-22 06:27:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:24,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:27:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:24,976 INFO L225 Difference]: With dead ends: 1077 [2020-12-22 06:27:24,976 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 06:27:24,978 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 06:27:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 06:27:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 553. [2020-12-22 06:27:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-12-22 06:27:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 973 transitions. [2020-12-22 06:27:25,015 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 973 transitions. Word has length 61 [2020-12-22 06:27:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:25,015 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 973 transitions. [2020-12-22 06:27:25,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 973 transitions. [2020-12-22 06:27:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:27:25,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:25,017 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:27:25,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:27:25,020 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash -193202821, now seen corresponding path program 1 times [2020-12-22 06:27:25,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:25,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111179520] [2020-12-22 06:27:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:25,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111179520] [2020-12-22 06:27:25,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906194632] [2020-12-22 06:27:25,131 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 06:27:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:25,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:27:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:27:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:25,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:27:25,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:27:25,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113848148] [2020-12-22 06:27:25,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:25,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:25,819 INFO L87 Difference]: Start difference. First operand 553 states and 973 transitions. Second operand 5 states. [2020-12-22 06:27:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:25,910 INFO L93 Difference]: Finished difference Result 1081 states and 1888 transitions. [2020-12-22 06:27:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:27:25,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 06:27:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:25,917 INFO L225 Difference]: With dead ends: 1081 [2020-12-22 06:27:25,917 INFO L226 Difference]: Without dead ends: 923 [2020-12-22 06:27:25,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2020-12-22 06:27:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 763. [2020-12-22 06:27:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 763 states. [2020-12-22 06:27:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1356 transitions. [2020-12-22 06:27:25,973 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1356 transitions. Word has length 62 [2020-12-22 06:27:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:25,973 INFO L481 AbstractCegarLoop]: Abstraction has 763 states and 1356 transitions. [2020-12-22 06:27:25,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1356 transitions. [2020-12-22 06:27:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:27:25,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:25,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:26,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 06:27:26,191 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:26,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1215668562, now seen corresponding path program 1 times [2020-12-22 06:27:26,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:26,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761186399] [2020-12-22 06:27:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:26,257 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 06:27:26,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761186399] [2020-12-22 06:27:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058468313] [2020-12-22 06:27:26,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:26,260 INFO L87 Difference]: Start difference. First operand 763 states and 1356 transitions. Second operand 3 states. [2020-12-22 06:27:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:26,348 INFO L93 Difference]: Finished difference Result 1959 states and 3499 transitions. [2020-12-22 06:27:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:26,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:27:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:26,356 INFO L225 Difference]: With dead ends: 1959 [2020-12-22 06:27:26,356 INFO L226 Difference]: Without dead ends: 1285 [2020-12-22 06:27:26,358 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 06:27:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-12-22 06:27:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1127. [2020-12-22 06:27:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2020-12-22 06:27:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2020 transitions. [2020-12-22 06:27:26,459 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2020 transitions. Word has length 68 [2020-12-22 06:27:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:26,459 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 2020 transitions. [2020-12-22 06:27:26,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2020 transitions. [2020-12-22 06:27:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:27:26,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:26,470 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:27:26,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:27:26,471 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:26,471 INFO L82 PathProgramCache]: Analyzing trace with hash -131383234, now seen corresponding path program 2 times [2020-12-22 06:27:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:26,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736420220] [2020-12-22 06:27:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736420220] [2020-12-22 06:27:26,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:26,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:26,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924190050] [2020-12-22 06:27:26,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:26,664 INFO L87 Difference]: Start difference. First operand 1127 states and 2020 transitions. Second operand 5 states. [2020-12-22 06:27:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:26,861 INFO L93 Difference]: Finished difference Result 2169 states and 3880 transitions. [2020-12-22 06:27:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:26,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 06:27:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:26,876 INFO L225 Difference]: With dead ends: 2169 [2020-12-22 06:27:26,876 INFO L226 Difference]: Without dead ends: 1285 [2020-12-22 06:27:26,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 06:27:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-12-22 06:27:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1127. [2020-12-22 06:27:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2020-12-22 06:27:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2018 transitions. [2020-12-22 06:27:27,006 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2018 transitions. Word has length 69 [2020-12-22 06:27:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:27,006 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 2018 transitions. [2020-12-22 06:27:27,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2018 transitions. [2020-12-22 06:27:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:27:27,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:27,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:27,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:27:27,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1121988477, now seen corresponding path program 1 times [2020-12-22 06:27:27,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:27,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745772660] [2020-12-22 06:27:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:27,115 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 06:27:27,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745772660] [2020-12-22 06:27:27,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:27,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:27,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714415051] [2020-12-22 06:27:27,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:27,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:27,118 INFO L87 Difference]: Start difference. First operand 1127 states and 2018 transitions. Second operand 3 states. [2020-12-22 06:27:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:27,292 INFO L93 Difference]: Finished difference Result 3023 states and 5440 transitions. [2020-12-22 06:27:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:27,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:27:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:27,305 INFO L225 Difference]: With dead ends: 3023 [2020-12-22 06:27:27,305 INFO L226 Difference]: Without dead ends: 1993 [2020-12-22 06:27:27,307 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 06:27:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-12-22 06:27:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1835. [2020-12-22 06:27:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-12-22 06:27:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 3309 transitions. [2020-12-22 06:27:27,449 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 3309 transitions. Word has length 69 [2020-12-22 06:27:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:27,451 INFO L481 AbstractCegarLoop]: Abstraction has 1835 states and 3309 transitions. [2020-12-22 06:27:27,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 3309 transitions. [2020-12-22 06:27:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:27:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:27,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:27,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:27:27,457 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:27,458 INFO L82 PathProgramCache]: Analyzing trace with hash 910355568, now seen corresponding path program 1 times [2020-12-22 06:27:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:27,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089591933] [2020-12-22 06:27:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:27,564 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 06:27:27,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089591933] [2020-12-22 06:27:27,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:27,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:27,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231781555] [2020-12-22 06:27:27,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:27,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:27,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:27,573 INFO L87 Difference]: Start difference. First operand 1835 states and 3309 transitions. Second operand 3 states. [2020-12-22 06:27:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:27,799 INFO L93 Difference]: Finished difference Result 4883 states and 8832 transitions. [2020-12-22 06:27:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:27,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:27:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:27,820 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 06:27:27,821 INFO L226 Difference]: Without dead ends: 3179 [2020-12-22 06:27:27,825 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 06:27:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2020-12-22 06:27:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3021. [2020-12-22 06:27:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3021 states. [2020-12-22 06:27:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5466 transitions. [2020-12-22 06:27:28,072 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5466 transitions. Word has length 70 [2020-12-22 06:27:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:28,072 INFO L481 AbstractCegarLoop]: Abstraction has 3021 states and 5466 transitions. [2020-12-22 06:27:28,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5466 transitions. [2020-12-22 06:27:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:27:28,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:28,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:28,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:27:28,078 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1352445838, now seen corresponding path program 1 times [2020-12-22 06:27:28,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:28,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262650807] [2020-12-22 06:27:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:28,148 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 06:27:28,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262650807] [2020-12-22 06:27:28,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:28,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126943411] [2020-12-22 06:27:28,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:28,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:28,151 INFO L87 Difference]: Start difference. First operand 3021 states and 5466 transitions. Second operand 3 states. [2020-12-22 06:27:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:28,545 INFO L93 Difference]: Finished difference Result 8157 states and 14786 transitions. [2020-12-22 06:27:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:28,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:27:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:28,580 INFO L225 Difference]: With dead ends: 8157 [2020-12-22 06:27:28,580 INFO L226 Difference]: Without dead ends: 5301 [2020-12-22 06:27:28,587 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 06:27:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2020-12-22 06:27:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 5143. [2020-12-22 06:27:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5143 states. [2020-12-22 06:27:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 9315 transitions. [2020-12-22 06:27:28,976 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 9315 transitions. Word has length 71 [2020-12-22 06:27:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:28,977 INFO L481 AbstractCegarLoop]: Abstraction has 5143 states and 9315 transitions. [2020-12-22 06:27:28,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 9315 transitions. [2020-12-22 06:27:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:27:28,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:28,987 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:27:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:27:28,987 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1058303086, now seen corresponding path program 1 times [2020-12-22 06:27:28,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:28,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461482416] [2020-12-22 06:27:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:27:29,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461482416] [2020-12-22 06:27:29,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:29,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:29,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228650329] [2020-12-22 06:27:29,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:29,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:29,083 INFO L87 Difference]: Start difference. First operand 5143 states and 9315 transitions. Second operand 5 states. [2020-12-22 06:27:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:29,892 INFO L93 Difference]: Finished difference Result 14656 states and 26576 transitions. [2020-12-22 06:27:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:27:29,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 06:27:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:29,955 INFO L225 Difference]: With dead ends: 14656 [2020-12-22 06:27:29,955 INFO L226 Difference]: Without dead ends: 9756 [2020-12-22 06:27:29,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:27:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9756 states. [2020-12-22 06:27:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9756 to 5143. [2020-12-22 06:27:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5143 states. [2020-12-22 06:27:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 9265 transitions. [2020-12-22 06:27:30,442 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 9265 transitions. Word has length 72 [2020-12-22 06:27:30,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:30,442 INFO L481 AbstractCegarLoop]: Abstraction has 5143 states and 9265 transitions. [2020-12-22 06:27:30,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 9265 transitions. [2020-12-22 06:27:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:27:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:30,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:30,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:27:30,449 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -659289439, now seen corresponding path program 1 times [2020-12-22 06:27:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:30,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127989988] [2020-12-22 06:27:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:30,523 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 06:27:30,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127989988] [2020-12-22 06:27:30,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:30,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:30,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717295814] [2020-12-22 06:27:30,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:30,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:30,526 INFO L87 Difference]: Start difference. First operand 5143 states and 9265 transitions. Second operand 3 states. [2020-12-22 06:27:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:31,210 INFO L93 Difference]: Finished difference Result 14981 states and 27028 transitions. [2020-12-22 06:27:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:31,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:27:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:31,244 INFO L225 Difference]: With dead ends: 14981 [2020-12-22 06:27:31,244 INFO L226 Difference]: Without dead ends: 10007 [2020-12-22 06:27:31,256 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 06:27:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10007 states. [2020-12-22 06:27:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10007 to 9849. [2020-12-22 06:27:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9849 states. [2020-12-22 06:27:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 17746 transitions. [2020-12-22 06:27:31,927 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 17746 transitions. Word has length 72 [2020-12-22 06:27:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:31,927 INFO L481 AbstractCegarLoop]: Abstraction has 9849 states and 17746 transitions. [2020-12-22 06:27:31,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 17746 transitions. [2020-12-22 06:27:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:27:31,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:31,938 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:27:31,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:27:31,938 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1445262707, now seen corresponding path program 1 times [2020-12-22 06:27:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:31,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224921627] [2020-12-22 06:27:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:32,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224921627] [2020-12-22 06:27:32,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:32,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:32,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575076087] [2020-12-22 06:27:32,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:27:32,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:27:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:27:32,096 INFO L87 Difference]: Start difference. First operand 9849 states and 17746 transitions. Second operand 4 states. [2020-12-22 06:27:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:32,550 INFO L93 Difference]: Finished difference Result 9948 states and 17909 transitions. [2020-12-22 06:27:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:27:32,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 06:27:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:32,582 INFO L225 Difference]: With dead ends: 9948 [2020-12-22 06:27:32,583 INFO L226 Difference]: Without dead ends: 9849 [2020-12-22 06:27:32,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:27:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9849 states. [2020-12-22 06:27:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9849 to 9849. [2020-12-22 06:27:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9849 states. [2020-12-22 06:27:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 17744 transitions. [2020-12-22 06:27:33,261 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 17744 transitions. Word has length 73 [2020-12-22 06:27:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:33,262 INFO L481 AbstractCegarLoop]: Abstraction has 9849 states and 17744 transitions. [2020-12-22 06:27:33,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:27:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 17744 transitions. [2020-12-22 06:27:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:27:33,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:33,272 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:27:33,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:27:33,272 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1527183405, now seen corresponding path program 1 times [2020-12-22 06:27:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:33,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60239262] [2020-12-22 06:27:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:33,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60239262] [2020-12-22 06:27:33,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:33,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:33,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697025290] [2020-12-22 06:27:33,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:33,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:33,408 INFO L87 Difference]: Start difference. First operand 9849 states and 17744 transitions. Second operand 5 states. [2020-12-22 06:27:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:34,212 INFO L93 Difference]: Finished difference Result 10282 states and 18450 transitions. [2020-12-22 06:27:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:27:34,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-12-22 06:27:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:34,252 INFO L225 Difference]: With dead ends: 10282 [2020-12-22 06:27:34,252 INFO L226 Difference]: Without dead ends: 10184 [2020-12-22 06:27:34,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2020-12-22 06:27:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9931. [2020-12-22 06:27:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9931 states. [2020-12-22 06:27:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9931 states to 9931 states and 17877 transitions. [2020-12-22 06:27:35,044 INFO L78 Accepts]: Start accepts. Automaton has 9931 states and 17877 transitions. Word has length 76 [2020-12-22 06:27:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:35,045 INFO L481 AbstractCegarLoop]: Abstraction has 9931 states and 17877 transitions. [2020-12-22 06:27:35,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9931 states and 17877 transitions. [2020-12-22 06:27:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:27:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:35,056 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:27:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:27:35,056 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2095526246, now seen corresponding path program 1 times [2020-12-22 06:27:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987374344] [2020-12-22 06:27:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:35,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987374344] [2020-12-22 06:27:35,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:35,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:35,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59379684] [2020-12-22 06:27:35,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:35,260 INFO L87 Difference]: Start difference. First operand 9931 states and 17877 transitions. Second operand 9 states. [2020-12-22 06:27:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:35,966 INFO L93 Difference]: Finished difference Result 10106 states and 18159 transitions. [2020-12-22 06:27:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:27:35,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-12-22 06:27:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:35,999 INFO L225 Difference]: With dead ends: 10106 [2020-12-22 06:27:35,999 INFO L226 Difference]: Without dead ends: 9929 [2020-12-22 06:27:36,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-12-22 06:27:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2020-12-22 06:27:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 9911. [2020-12-22 06:27:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9911 states. [2020-12-22 06:27:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9911 states to 9911 states and 17840 transitions. [2020-12-22 06:27:36,701 INFO L78 Accepts]: Start accepts. Automaton has 9911 states and 17840 transitions. Word has length 77 [2020-12-22 06:27:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:36,701 INFO L481 AbstractCegarLoop]: Abstraction has 9911 states and 17840 transitions. [2020-12-22 06:27:36,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:27:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9911 states and 17840 transitions. [2020-12-22 06:27:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:27:36,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:36,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:36,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:27:36,719 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1371924307, now seen corresponding path program 1 times [2020-12-22 06:27:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:36,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157036842] [2020-12-22 06:27:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157036842] [2020-12-22 06:27:36,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:36,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:36,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487726442] [2020-12-22 06:27:36,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:36,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:36,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:36,831 INFO L87 Difference]: Start difference. First operand 9911 states and 17840 transitions. Second operand 5 states. [2020-12-22 06:27:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:37,420 INFO L93 Difference]: Finished difference Result 10533 states and 18816 transitions. [2020-12-22 06:27:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:27:37,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:27:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:37,452 INFO L225 Difference]: With dead ends: 10533 [2020-12-22 06:27:37,453 INFO L226 Difference]: Without dead ends: 10348 [2020-12-22 06:27:37,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2020-12-22 06:27:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 10045. [2020-12-22 06:27:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10045 states. [2020-12-22 06:27:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 18050 transitions. [2020-12-22 06:27:38,088 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 18050 transitions. Word has length 89 [2020-12-22 06:27:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:38,088 INFO L481 AbstractCegarLoop]: Abstraction has 10045 states and 18050 transitions. [2020-12-22 06:27:38,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 18050 transitions. [2020-12-22 06:27:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 06:27:38,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:38,113 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:38,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:27:38,114 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1756467449, now seen corresponding path program 1 times [2020-12-22 06:27:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:38,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728583557] [2020-12-22 06:27:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728583557] [2020-12-22 06:27:38,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:38,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453556970] [2020-12-22 06:27:38,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:38,238 INFO L87 Difference]: Start difference. First operand 10045 states and 18050 transitions. Second operand 9 states. [2020-12-22 06:27:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:38,845 INFO L93 Difference]: Finished difference Result 10349 states and 18538 transitions. [2020-12-22 06:27:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:27:38,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 06:27:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:38,878 INFO L225 Difference]: With dead ends: 10349 [2020-12-22 06:27:38,878 INFO L226 Difference]: Without dead ends: 10044 [2020-12-22 06:27:38,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-12-22 06:27:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10044 states. [2020-12-22 06:27:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10044 to 9967. [2020-12-22 06:27:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9967 states. [2020-12-22 06:27:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 17919 transitions. [2020-12-22 06:27:39,681 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 17919 transitions. Word has length 90 [2020-12-22 06:27:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,681 INFO L481 AbstractCegarLoop]: Abstraction has 9967 states and 17919 transitions. [2020-12-22 06:27:39,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:27:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 17919 transitions. [2020-12-22 06:27:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:27:39,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:39,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:27:39,701 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 824954359, now seen corresponding path program 1 times [2020-12-22 06:27:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700839449] [2020-12-22 06:27:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:39,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700839449] [2020-12-22 06:27:39,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:27:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290120772] [2020-12-22 06:27:39,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:27:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:27:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:27:39,910 INFO L87 Difference]: Start difference. First operand 9967 states and 17919 transitions. Second operand 10 states. [2020-12-22 06:27:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:41,219 INFO L93 Difference]: Finished difference Result 10624 states and 18921 transitions. [2020-12-22 06:27:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:27:41,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-12-22 06:27:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:41,252 INFO L225 Difference]: With dead ends: 10624 [2020-12-22 06:27:41,252 INFO L226 Difference]: Without dead ends: 10446 [2020-12-22 06:27:41,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-12-22 06:27:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10446 states. [2020-12-22 06:27:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10446 to 10006. [2020-12-22 06:27:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10006 states. [2020-12-22 06:27:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10006 states to 10006 states and 17972 transitions. [2020-12-22 06:27:41,835 INFO L78 Accepts]: Start accepts. Automaton has 10006 states and 17972 transitions. Word has length 92 [2020-12-22 06:27:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:41,835 INFO L481 AbstractCegarLoop]: Abstraction has 10006 states and 17972 transitions. [2020-12-22 06:27:41,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:27:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10006 states and 17972 transitions. [2020-12-22 06:27:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:27:41,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:41,851 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:41,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:27:41,852 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 678836210, now seen corresponding path program 1 times [2020-12-22 06:27:41,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:41,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516532450] [2020-12-22 06:27:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:41,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516532450] [2020-12-22 06:27:41,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:41,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:27:41,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097884501] [2020-12-22 06:27:41,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:27:41,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:27:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:27:41,988 INFO L87 Difference]: Start difference. First operand 10006 states and 17972 transitions. Second operand 9 states. [2020-12-22 06:27:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:42,998 INFO L93 Difference]: Finished difference Result 11177 states and 19747 transitions. [2020-12-22 06:27:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 06:27:42,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 06:27:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:43,023 INFO L225 Difference]: With dead ends: 11177 [2020-12-22 06:27:43,024 INFO L226 Difference]: Without dead ends: 10974 [2020-12-22 06:27:43,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-12-22 06:27:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10974 states. [2020-12-22 06:27:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10974 to 10231. [2020-12-22 06:27:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10231 states. [2020-12-22 06:27:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 18313 transitions. [2020-12-22 06:27:43,864 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 18313 transitions. Word has length 93 [2020-12-22 06:27:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:43,864 INFO L481 AbstractCegarLoop]: Abstraction has 10231 states and 18313 transitions. [2020-12-22 06:27:43,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:27:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 18313 transitions. [2020-12-22 06:27:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:27:43,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:43,882 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:43,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:27:43,882 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -635527938, now seen corresponding path program 1 times [2020-12-22 06:27:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:43,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537295480] [2020-12-22 06:27:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:44,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537295480] [2020-12-22 06:27:44,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:44,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 06:27:44,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541561543] [2020-12-22 06:27:44,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 06:27:44,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 06:27:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 06:27:44,157 INFO L87 Difference]: Start difference. First operand 10231 states and 18313 transitions. Second operand 12 states. [2020-12-22 06:27:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:47,390 INFO L93 Difference]: Finished difference Result 33963 states and 59851 transitions. [2020-12-22 06:27:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 06:27:47,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-12-22 06:27:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:47,469 INFO L225 Difference]: With dead ends: 33963 [2020-12-22 06:27:47,469 INFO L226 Difference]: Without dead ends: 33654 [2020-12-22 06:27:47,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 06:27:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33654 states. [2020-12-22 06:27:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33654 to 20792. [2020-12-22 06:27:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20792 states. [2020-12-22 06:27:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20792 states to 20792 states and 37113 transitions. [2020-12-22 06:27:49,024 INFO L78 Accepts]: Start accepts. Automaton has 20792 states and 37113 transitions. Word has length 93 [2020-12-22 06:27:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 20792 states and 37113 transitions. [2020-12-22 06:27:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 06:27:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 20792 states and 37113 transitions. [2020-12-22 06:27:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:27:49,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:49,055 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:49,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:27:49,055 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:49,056 INFO L82 PathProgramCache]: Analyzing trace with hash -547535786, now seen corresponding path program 1 times [2020-12-22 06:27:49,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:49,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963350818] [2020-12-22 06:27:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:49,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963350818] [2020-12-22 06:27:49,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:49,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:27:49,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451437109] [2020-12-22 06:27:49,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:27:49,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:49,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:27:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:49,158 INFO L87 Difference]: Start difference. First operand 20792 states and 37113 transitions. Second operand 7 states. [2020-12-22 06:27:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:50,272 INFO L93 Difference]: Finished difference Result 22044 states and 39016 transitions. [2020-12-22 06:27:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:27:50,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 06:27:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:50,305 INFO L225 Difference]: With dead ends: 22044 [2020-12-22 06:27:50,305 INFO L226 Difference]: Without dead ends: 20825 [2020-12-22 06:27:50,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:27:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20825 states. [2020-12-22 06:27:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20825 to 20650. [2020-12-22 06:27:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 06:27:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 36887 transitions. [2020-12-22 06:27:51,407 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 36887 transitions. Word has length 93 [2020-12-22 06:27:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:51,407 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 36887 transitions. [2020-12-22 06:27:51,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:27:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 36887 transitions. [2020-12-22 06:27:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:27:51,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:51,424 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:51,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:27:51,425 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash -659278606, now seen corresponding path program 1 times [2020-12-22 06:27:51,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:51,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168888889] [2020-12-22 06:27:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:51,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168888889] [2020-12-22 06:27:51,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:51,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:27:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832981013] [2020-12-22 06:27:51,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:27:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:51,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:27:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:51,529 INFO L87 Difference]: Start difference. First operand 20650 states and 36887 transitions. Second operand 7 states. [2020-12-22 06:27:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:53,664 INFO L93 Difference]: Finished difference Result 27324 states and 47081 transitions. [2020-12-22 06:27:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:27:53,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 06:27:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:53,702 INFO L225 Difference]: With dead ends: 27324 [2020-12-22 06:27:53,702 INFO L226 Difference]: Without dead ends: 26581 [2020-12-22 06:27:53,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-12-22 06:27:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26581 states. [2020-12-22 06:27:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26581 to 21797. [2020-12-22 06:27:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21797 states. [2020-12-22 06:27:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21797 states to 21797 states and 38605 transitions. [2020-12-22 06:27:55,042 INFO L78 Accepts]: Start accepts. Automaton has 21797 states and 38605 transitions. Word has length 94 [2020-12-22 06:27:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:55,042 INFO L481 AbstractCegarLoop]: Abstraction has 21797 states and 38605 transitions. [2020-12-22 06:27:55,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:27:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 21797 states and 38605 transitions. [2020-12-22 06:27:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:27:55,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:55,074 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:55,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:27:55,074 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2054331346, now seen corresponding path program 1 times [2020-12-22 06:27:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:55,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565412335] [2020-12-22 06:27:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:55,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565412335] [2020-12-22 06:27:55,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:55,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:27:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784646338] [2020-12-22 06:27:55,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:27:55,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:27:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:27:55,156 INFO L87 Difference]: Start difference. First operand 21797 states and 38605 transitions. Second operand 4 states. [2020-12-22 06:27:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:56,462 INFO L93 Difference]: Finished difference Result 24235 states and 42294 transitions. [2020-12-22 06:27:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:56,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 06:27:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:56,496 INFO L225 Difference]: With dead ends: 24235 [2020-12-22 06:27:56,496 INFO L226 Difference]: Without dead ends: 22842 [2020-12-22 06:27:56,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:27:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22842 states. [2020-12-22 06:27:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22842 to 21829. [2020-12-22 06:27:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21829 states. [2020-12-22 06:27:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21829 states to 21829 states and 38637 transitions. [2020-12-22 06:27:57,955 INFO L78 Accepts]: Start accepts. Automaton has 21829 states and 38637 transitions. Word has length 95 [2020-12-22 06:27:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:57,956 INFO L481 AbstractCegarLoop]: Abstraction has 21829 states and 38637 transitions. [2020-12-22 06:27:57,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:27:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 21829 states and 38637 transitions. [2020-12-22 06:27:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:27:57,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:57,982 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:57,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:27:57,982 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash 774467668, now seen corresponding path program 1 times [2020-12-22 06:27:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472355657] [2020-12-22 06:27:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:27:58,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472355657] [2020-12-22 06:27:58,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:58,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 06:27:58,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595028037] [2020-12-22 06:27:58,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 06:27:58,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 06:27:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:27:58,133 INFO L87 Difference]: Start difference. First operand 21829 states and 38637 transitions. Second operand 11 states. [2020-12-22 06:27:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:59,912 INFO L93 Difference]: Finished difference Result 23181 states and 40667 transitions. [2020-12-22 06:27:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:27:59,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-12-22 06:27:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:59,951 INFO L225 Difference]: With dead ends: 23181 [2020-12-22 06:27:59,951 INFO L226 Difference]: Without dead ends: 22570 [2020-12-22 06:27:59,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-22 06:27:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22570 states. [2020-12-22 06:28:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22570 to 21962. [2020-12-22 06:28:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21962 states. [2020-12-22 06:28:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 38827 transitions. [2020-12-22 06:28:01,271 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 38827 transitions. Word has length 95 [2020-12-22 06:28:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:01,271 INFO L481 AbstractCegarLoop]: Abstraction has 21962 states and 38827 transitions. [2020-12-22 06:28:01,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 06:28:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 38827 transitions. [2020-12-22 06:28:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:01,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:01,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:01,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 06:28:01,313 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1395652787, now seen corresponding path program 1 times [2020-12-22 06:28:01,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:01,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160533713] [2020-12-22 06:28:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:01,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160533713] [2020-12-22 06:28:01,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:01,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:28:01,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134221104] [2020-12-22 06:28:01,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:28:01,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:28:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:28:01,460 INFO L87 Difference]: Start difference. First operand 21962 states and 38827 transitions. Second operand 10 states. [2020-12-22 06:28:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:03,474 INFO L93 Difference]: Finished difference Result 24577 states and 42748 transitions. [2020-12-22 06:28:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:28:03,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 96 [2020-12-22 06:28:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:03,502 INFO L225 Difference]: With dead ends: 24577 [2020-12-22 06:28:03,503 INFO L226 Difference]: Without dead ends: 24043 [2020-12-22 06:28:03,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:28:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24043 states. [2020-12-22 06:28:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24043 to 22067. [2020-12-22 06:28:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22067 states. [2020-12-22 06:28:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22067 states to 22067 states and 38967 transitions. [2020-12-22 06:28:04,673 INFO L78 Accepts]: Start accepts. Automaton has 22067 states and 38967 transitions. Word has length 96 [2020-12-22 06:28:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:04,673 INFO L481 AbstractCegarLoop]: Abstraction has 22067 states and 38967 transitions. [2020-12-22 06:28:04,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:28:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22067 states and 38967 transitions. [2020-12-22 06:28:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:04,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:04,711 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:04,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 06:28:04,711 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1195144083, now seen corresponding path program 1 times [2020-12-22 06:28:04,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:04,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6779265] [2020-12-22 06:28:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:04,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6779265] [2020-12-22 06:28:04,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:04,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:28:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128445644] [2020-12-22 06:28:04,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:28:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:28:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:28:04,811 INFO L87 Difference]: Start difference. First operand 22067 states and 38967 transitions. Second operand 7 states. [2020-12-22 06:28:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:06,357 INFO L93 Difference]: Finished difference Result 25637 states and 44298 transitions. [2020-12-22 06:28:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:28:06,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 06:28:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:06,407 INFO L225 Difference]: With dead ends: 25637 [2020-12-22 06:28:06,407 INFO L226 Difference]: Without dead ends: 22948 [2020-12-22 06:28:06,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:28:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22948 states. [2020-12-22 06:28:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22948 to 22049. [2020-12-22 06:28:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22049 states. [2020-12-22 06:28:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22049 states to 22049 states and 38905 transitions. [2020-12-22 06:28:07,586 INFO L78 Accepts]: Start accepts. Automaton has 22049 states and 38905 transitions. Word has length 96 [2020-12-22 06:28:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:07,586 INFO L481 AbstractCegarLoop]: Abstraction has 22049 states and 38905 transitions. [2020-12-22 06:28:07,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:28:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 22049 states and 38905 transitions. [2020-12-22 06:28:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:07,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:07,611 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:07,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 06:28:07,611 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 928693752, now seen corresponding path program 1 times [2020-12-22 06:28:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:07,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747701042] [2020-12-22 06:28:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:07,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747701042] [2020-12-22 06:28:07,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:07,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:28:07,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469488904] [2020-12-22 06:28:07,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:28:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:28:07,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:28:07,845 INFO L87 Difference]: Start difference. First operand 22049 states and 38905 transitions. Second operand 6 states. [2020-12-22 06:28:09,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:09,097 INFO L93 Difference]: Finished difference Result 24437 states and 42498 transitions. [2020-12-22 06:28:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:28:09,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-12-22 06:28:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:09,130 INFO L225 Difference]: With dead ends: 24437 [2020-12-22 06:28:09,130 INFO L226 Difference]: Without dead ends: 22460 [2020-12-22 06:28:09,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:28:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22460 states. [2020-12-22 06:28:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22460 to 21513. [2020-12-22 06:28:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21513 states. [2020-12-22 06:28:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21513 states to 21513 states and 38109 transitions. [2020-12-22 06:28:10,446 INFO L78 Accepts]: Start accepts. Automaton has 21513 states and 38109 transitions. Word has length 96 [2020-12-22 06:28:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:10,446 INFO L481 AbstractCegarLoop]: Abstraction has 21513 states and 38109 transitions. [2020-12-22 06:28:10,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:28:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 21513 states and 38109 transitions. [2020-12-22 06:28:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:10,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:10,463 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:10,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 06:28:10,463 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1597918002, now seen corresponding path program 1 times [2020-12-22 06:28:10,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:10,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755032904] [2020-12-22 06:28:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755032904] [2020-12-22 06:28:10,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:10,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:10,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107086501] [2020-12-22 06:28:10,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:28:10,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:28:10,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:28:10,529 INFO L87 Difference]: Start difference. First operand 21513 states and 38109 transitions. Second operand 4 states. [2020-12-22 06:28:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:11,494 INFO L93 Difference]: Finished difference Result 22111 states and 39038 transitions. [2020-12-22 06:28:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:28:11,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-12-22 06:28:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:11,528 INFO L225 Difference]: With dead ends: 22111 [2020-12-22 06:28:11,528 INFO L226 Difference]: Without dead ends: 20861 [2020-12-22 06:28:11,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:28:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20861 states. [2020-12-22 06:28:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20861 to 20861. [2020-12-22 06:28:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20861 states. [2020-12-22 06:28:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 37147 transitions. [2020-12-22 06:28:12,817 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 37147 transitions. Word has length 96 [2020-12-22 06:28:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 20861 states and 37147 transitions. [2020-12-22 06:28:12,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:28:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 37147 transitions. [2020-12-22 06:28:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 06:28:12,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:12,835 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:12,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 06:28:12,836 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash -680057775, now seen corresponding path program 1 times [2020-12-22 06:28:12,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:12,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542629092] [2020-12-22 06:28:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:12,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542629092] [2020-12-22 06:28:12,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:12,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 06:28:12,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322266917] [2020-12-22 06:28:12,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 06:28:12,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:12,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 06:28:12,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 06:28:12,992 INFO L87 Difference]: Start difference. First operand 20861 states and 37147 transitions. Second operand 12 states. [2020-12-22 06:28:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:18,119 INFO L93 Difference]: Finished difference Result 59073 states and 103097 transitions. [2020-12-22 06:28:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 06:28:18,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-12-22 06:28:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:18,203 INFO L225 Difference]: With dead ends: 59073 [2020-12-22 06:28:18,203 INFO L226 Difference]: Without dead ends: 57932 [2020-12-22 06:28:18,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2020-12-22 06:28:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57932 states. [2020-12-22 06:28:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57932 to 41490. [2020-12-22 06:28:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41490 states. [2020-12-22 06:28:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41490 states to 41490 states and 73867 transitions. [2020-12-22 06:28:20,752 INFO L78 Accepts]: Start accepts. Automaton has 41490 states and 73867 transitions. Word has length 97 [2020-12-22 06:28:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:20,752 INFO L481 AbstractCegarLoop]: Abstraction has 41490 states and 73867 transitions. [2020-12-22 06:28:20,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 06:28:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41490 states and 73867 transitions. [2020-12-22 06:28:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 06:28:20,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:20,786 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:20,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 06:28:20,787 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash -679998193, now seen corresponding path program 1 times [2020-12-22 06:28:20,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:20,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797695960] [2020-12-22 06:28:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:28:20,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797695960] [2020-12-22 06:28:20,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174962397] [2020-12-22 06:28:20,883 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 06:28:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:21,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 06:28:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:28:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:28:21,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:28:21,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 06:28:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659181532] [2020-12-22 06:28:21,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:28:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:28:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:28:21,736 INFO L87 Difference]: Start difference. First operand 41490 states and 73867 transitions. Second operand 6 states. [2020-12-22 06:28:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:25,437 INFO L93 Difference]: Finished difference Result 53894 states and 93589 transitions. [2020-12-22 06:28:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:28:25,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-22 06:28:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:25,518 INFO L225 Difference]: With dead ends: 53894 [2020-12-22 06:28:25,518 INFO L226 Difference]: Without dead ends: 50826 [2020-12-22 06:28:25,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:28:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50826 states. [2020-12-22 06:28:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50826 to 46172. [2020-12-22 06:28:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46172 states. [2020-12-22 06:28:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46172 states to 46172 states and 82201 transitions. [2020-12-22 06:28:28,319 INFO L78 Accepts]: Start accepts. Automaton has 46172 states and 82201 transitions. Word has length 97 [2020-12-22 06:28:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 46172 states and 82201 transitions. [2020-12-22 06:28:28,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:28:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 46172 states and 82201 transitions. [2020-12-22 06:28:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 06:28:28,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:28,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:28,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 06:28:28,566 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1523800031, now seen corresponding path program 1 times [2020-12-22 06:28:28,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:28,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673722812] [2020-12-22 06:28:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:28,627 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 06:28:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673722812] [2020-12-22 06:28:28,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:28,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:28:28,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089456077] [2020-12-22 06:28:28,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:28:28,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:28:28,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:28:28,629 INFO L87 Difference]: Start difference. First operand 46172 states and 82201 transitions. Second operand 3 states. [2020-12-22 06:28:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:34,033 INFO L93 Difference]: Finished difference Result 129654 states and 231201 transitions. [2020-12-22 06:28:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:28:34,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 06:28:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:34,206 INFO L225 Difference]: With dead ends: 129654 [2020-12-22 06:28:34,206 INFO L226 Difference]: Without dead ends: 86322 [2020-12-22 06:28:34,260 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 06:28:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86322 states. [2020-12-22 06:28:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86322 to 83254. [2020-12-22 06:28:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83254 states. [2020-12-22 06:28:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83254 states to 83254 states and 149151 transitions. [2020-12-22 06:28:39,462 INFO L78 Accepts]: Start accepts. Automaton has 83254 states and 149151 transitions. Word has length 97 [2020-12-22 06:28:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:39,462 INFO L481 AbstractCegarLoop]: Abstraction has 83254 states and 149151 transitions. [2020-12-22 06:28:39,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:28:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83254 states and 149151 transitions. [2020-12-22 06:28:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 06:28:39,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:39,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:39,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 06:28:39,539 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:39,539 INFO L82 PathProgramCache]: Analyzing trace with hash 351246213, now seen corresponding path program 1 times [2020-12-22 06:28:39,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:39,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438708946] [2020-12-22 06:28:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:39,610 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 06:28:39,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438708946] [2020-12-22 06:28:39,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:39,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:28:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990891952] [2020-12-22 06:28:39,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:28:39,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:28:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:28:39,613 INFO L87 Difference]: Start difference. First operand 83254 states and 149151 transitions. Second operand 3 states. [2020-12-22 06:28:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:48,869 INFO L93 Difference]: Finished difference Result 240628 states and 431291 transitions. [2020-12-22 06:28:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:28:48,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 06:28:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:49,471 INFO L225 Difference]: With dead ends: 240628 [2020-12-22 06:28:49,472 INFO L226 Difference]: Without dead ends: 160664 [2020-12-22 06:28:49,567 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 06:28:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160664 states. [2020-12-22 06:28:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160664 to 157596. [2020-12-22 06:28:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157596 states. [2020-12-22 06:28:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157596 states to 157596 states and 282801 transitions. [2020-12-22 06:28:59,178 INFO L78 Accepts]: Start accepts. Automaton has 157596 states and 282801 transitions. Word has length 98 [2020-12-22 06:28:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:59,179 INFO L481 AbstractCegarLoop]: Abstraction has 157596 states and 282801 transitions. [2020-12-22 06:28:59,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:28:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 157596 states and 282801 transitions. [2020-12-22 06:28:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 06:28:59,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:59,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:59,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 06:28:59,298 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -604161903, now seen corresponding path program 1 times [2020-12-22 06:28:59,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:59,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954084269] [2020-12-22 06:28:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:59,419 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 06:28:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954084269] [2020-12-22 06:28:59,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:28:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654834914] [2020-12-22 06:28:59,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:28:59,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:59,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:28:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:28:59,423 INFO L87 Difference]: Start difference. First operand 157596 states and 282801 transitions. Second operand 3 states.