/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_spec11_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:19:55,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:19:55,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:19:55,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:19:55,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:19:55,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:19:55,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:19:55,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:19:55,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:19:55,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:19:55,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:19:55,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:19:55,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:19:55,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:19:55,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:19:55,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:19:55,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:19:55,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:19:55,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:19:55,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:19:55,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:19:55,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:19:55,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:19:55,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:19:55,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:19:55,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:19:55,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:19:55,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:19:55,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:19:55,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:19:55,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:19:55,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:19:55,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:19:55,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:19:55,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:19:55,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:19:55,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:19:55,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:19:55,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:19:55,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:19:55,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:19:55,638 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:19:55,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:19:55,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:19:55,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:19:55,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:19:55,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:19:55,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:19:55,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:19:55,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:19:55,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:19:55,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:19:55,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:19:55,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:19:55,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:19:55,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:19:55,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:19:55,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:19:55,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:19:55,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:19:55,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:19:55,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:19:55,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:19:56,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:19:56,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:19:56,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:19:56,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:19:56,119 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:19:56,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2020-12-22 06:19:56,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6410c0a8/01ee40ec2f274952b828eeb65c0471a2/FLAG916685358 [2020-12-22 06:19:56,924 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:19:56,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2020-12-22 06:19:56,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6410c0a8/01ee40ec2f274952b828eeb65c0471a2/FLAG916685358 [2020-12-22 06:19:57,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6410c0a8/01ee40ec2f274952b828eeb65c0471a2 [2020-12-22 06:19:57,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:19:57,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:19:57,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:57,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:19:57,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:19:57,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:57" (1/1) ... [2020-12-22 06:19:57,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3848acd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:57, skipping insertion in model container [2020-12-22 06:19:57,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:57" (1/1) ... [2020-12-22 06:19:57,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:19:57,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:19:57,862 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_spec11_product18.cil.c[57581,57594] [2020-12-22 06:19:57,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:57,901 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:19:58,071 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_spec11_product18.cil.c[57581,57594] [2020-12-22 06:19:58,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:58,173 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:19:58,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58 WrapperNode [2020-12-22 06:19:58,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:58,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:58,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:19:58,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:19:58,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:58,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:19:58,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:19:58,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:19:58,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (1/1) ... [2020-12-22 06:19:58,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:19:58,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:19:58,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:19:58,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:19:58,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (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 06:19:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:19:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:19:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:19:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:19:58,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:20:01,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:20:01,126 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2020-12-22 06:20:01,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:20:01 BoogieIcfgContainer [2020-12-22 06:20:01,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:20:01,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:20:01,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:20:01,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:20:01,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:19:57" (1/3) ... [2020-12-22 06:20:01,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c3829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:20:01, skipping insertion in model container [2020-12-22 06:20:01,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:58" (2/3) ... [2020-12-22 06:20:01,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c3829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:20:01, skipping insertion in model container [2020-12-22 06:20:01,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:20:01" (3/3) ... [2020-12-22 06:20:01,138 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product18.cil.c [2020-12-22 06:20:01,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:20:01,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:20:01,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:20:01,203 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:20:01,203 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:20:01,203 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:20:01,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:20:01,204 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:20:01,204 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:20:01,204 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:20:01,204 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:20:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2020-12-22 06:20:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:20:01,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:01,244 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] [2020-12-22 06:20:01,245 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:01,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1400822452, now seen corresponding path program 1 times [2020-12-22 06:20:01,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:01,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235002580] [2020-12-22 06:20:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:01,683 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 06:20:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235002580] [2020-12-22 06:20:01,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:01,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:01,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866611435] [2020-12-22 06:20:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:01,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:01,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:01,717 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 3 states. [2020-12-22 06:20:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:01,919 INFO L93 Difference]: Finished difference Result 1156 states and 2024 transitions. [2020-12-22 06:20:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:01,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 06:20:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:01,985 INFO L225 Difference]: With dead ends: 1156 [2020-12-22 06:20:01,985 INFO L226 Difference]: Without dead ends: 752 [2020-12-22 06:20:01,993 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 06:20:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-12-22 06:20:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 385. [2020-12-22 06:20:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 668 transitions. [2020-12-22 06:20:02,100 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 668 transitions. Word has length 45 [2020-12-22 06:20:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,100 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 668 transitions. [2020-12-22 06:20:02,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 668 transitions. [2020-12-22 06:20:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:20:02,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,105 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] [2020-12-22 06:20:02,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:20:02,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1435806119, now seen corresponding path program 1 times [2020-12-22 06:20:02,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345633283] [2020-12-22 06:20:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:02,290 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 06:20:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345633283] [2020-12-22 06:20:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:02,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171913452] [2020-12-22 06:20:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:02,295 INFO L87 Difference]: Start difference. First operand 385 states and 668 transitions. Second operand 5 states. [2020-12-22 06:20:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,605 INFO L93 Difference]: Finished difference Result 1104 states and 1920 transitions. [2020-12-22 06:20:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:20:02,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-12-22 06:20:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,613 INFO L225 Difference]: With dead ends: 1104 [2020-12-22 06:20:02,614 INFO L226 Difference]: Without dead ends: 738 [2020-12-22 06:20:02,617 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 06:20:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-12-22 06:20:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 385. [2020-12-22 06:20:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 667 transitions. [2020-12-22 06:20:02,666 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 667 transitions. Word has length 47 [2020-12-22 06:20:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,670 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 667 transitions. [2020-12-22 06:20:02,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 667 transitions. [2020-12-22 06:20:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:20:02,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,678 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 06:20:02,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:20:02,678 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1947061100, now seen corresponding path program 1 times [2020-12-22 06:20:02,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515270098] [2020-12-22 06:20:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:02,854 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 06:20:02,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515270098] [2020-12-22 06:20:02,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:02,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:02,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141286757] [2020-12-22 06:20:02,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:02,858 INFO L87 Difference]: Start difference. First operand 385 states and 667 transitions. Second operand 3 states. [2020-12-22 06:20:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,912 INFO L93 Difference]: Finished difference Result 752 states and 1308 transitions. [2020-12-22 06:20:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:02,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 06:20:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,916 INFO L225 Difference]: With dead ends: 752 [2020-12-22 06:20:02,917 INFO L226 Difference]: Without dead ends: 390 [2020-12-22 06:20:02,918 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 06:20:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-22 06:20:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-12-22 06:20:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 666 transitions. [2020-12-22 06:20:02,940 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 666 transitions. Word has length 48 [2020-12-22 06:20:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,940 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 666 transitions. [2020-12-22 06:20:02,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 666 transitions. [2020-12-22 06:20:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 06:20:02,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,943 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] [2020-12-22 06:20:02,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:20:02,943 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash 140592614, now seen corresponding path program 1 times [2020-12-22 06:20:02,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992395953] [2020-12-22 06:20:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,044 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 06:20:03,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992395953] [2020-12-22 06:20:03,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:03,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847804494] [2020-12-22 06:20:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:03,052 INFO L87 Difference]: Start difference. First operand 385 states and 666 transitions. Second operand 3 states. [2020-12-22 06:20:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:03,110 INFO L93 Difference]: Finished difference Result 762 states and 1321 transitions. [2020-12-22 06:20:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:03,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 06:20:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:03,116 INFO L225 Difference]: With dead ends: 762 [2020-12-22 06:20:03,116 INFO L226 Difference]: Without dead ends: 385 [2020-12-22 06:20:03,118 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 06:20:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-12-22 06:20:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-12-22 06:20:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 664 transitions. [2020-12-22 06:20:03,138 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 664 transitions. Word has length 49 [2020-12-22 06:20:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:03,139 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 664 transitions. [2020-12-22 06:20:03,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 664 transitions. [2020-12-22 06:20:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:20:03,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:03,140 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 06:20:03,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:20:03,141 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:03,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1941161649, now seen corresponding path program 1 times [2020-12-22 06:20:03,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:03,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430331053] [2020-12-22 06:20:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,271 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 06:20:03,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430331053] [2020-12-22 06:20:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887655651] [2020-12-22 06:20:03,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:03,274 INFO L87 Difference]: Start difference. First operand 385 states and 664 transitions. Second operand 5 states. [2020-12-22 06:20:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:03,542 INFO L93 Difference]: Finished difference Result 1094 states and 1900 transitions. [2020-12-22 06:20:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:03,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 06:20:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:03,553 INFO L225 Difference]: With dead ends: 1094 [2020-12-22 06:20:03,554 INFO L226 Difference]: Without dead ends: 736 [2020-12-22 06:20:03,555 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 06:20:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-12-22 06:20:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 385. [2020-12-22 06:20:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 663 transitions. [2020-12-22 06:20:03,583 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 663 transitions. Word has length 50 [2020-12-22 06:20:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:03,583 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 663 transitions. [2020-12-22 06:20:03,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 663 transitions. [2020-12-22 06:20:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:20:03,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:03,587 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 06:20:03,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:20:03,587 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash -50501714, now seen corresponding path program 1 times [2020-12-22 06:20:03,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:03,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588958308] [2020-12-22 06:20:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,748 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 06:20:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588958308] [2020-12-22 06:20:03,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400145069] [2020-12-22 06:20:03,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:03,753 INFO L87 Difference]: Start difference. First operand 385 states and 663 transitions. Second operand 5 states. [2020-12-22 06:20:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:04,000 INFO L93 Difference]: Finished difference Result 1099 states and 1905 transitions. [2020-12-22 06:20:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:04,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 06:20:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:04,007 INFO L225 Difference]: With dead ends: 1099 [2020-12-22 06:20:04,007 INFO L226 Difference]: Without dead ends: 741 [2020-12-22 06:20:04,008 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 06:20:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-12-22 06:20:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 385. [2020-12-22 06:20:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 06:20:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 662 transitions. [2020-12-22 06:20:04,040 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 662 transitions. Word has length 51 [2020-12-22 06:20:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:04,041 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 662 transitions. [2020-12-22 06:20:04,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 662 transitions. [2020-12-22 06:20:04,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:20:04,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:04,042 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 06:20:04,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:20:04,043 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:04,044 INFO L82 PathProgramCache]: Analyzing trace with hash 91475862, now seen corresponding path program 1 times [2020-12-22 06:20:04,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:04,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461493706] [2020-12-22 06:20:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:04,113 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 06:20:04,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461493706] [2020-12-22 06:20:04,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:04,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:04,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348127631] [2020-12-22 06:20:04,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:04,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:04,116 INFO L87 Difference]: Start difference. First operand 385 states and 662 transitions. Second operand 3 states. [2020-12-22 06:20:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:04,156 INFO L93 Difference]: Finished difference Result 532 states and 900 transitions. [2020-12-22 06:20:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:04,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 06:20:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:04,161 INFO L225 Difference]: With dead ends: 532 [2020-12-22 06:20:04,161 INFO L226 Difference]: Without dead ends: 388 [2020-12-22 06:20:04,162 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 06:20:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-12-22 06:20:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2020-12-22 06:20:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-22 06:20:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 664 transitions. [2020-12-22 06:20:04,191 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 664 transitions. Word has length 52 [2020-12-22 06:20:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:04,191 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 664 transitions. [2020-12-22 06:20:04,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 664 transitions. [2020-12-22 06:20:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:20:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:04,193 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] [2020-12-22 06:20:04,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:20:04,194 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -219376792, now seen corresponding path program 1 times [2020-12-22 06:20:04,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:04,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246130343] [2020-12-22 06:20:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:04,267 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 06:20:04,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246130343] [2020-12-22 06:20:04,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:04,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:04,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731148410] [2020-12-22 06:20:04,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:04,269 INFO L87 Difference]: Start difference. First operand 387 states and 664 transitions. Second operand 3 states. [2020-12-22 06:20:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:04,327 INFO L93 Difference]: Finished difference Result 1047 states and 1816 transitions. [2020-12-22 06:20:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:04,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:20:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:04,338 INFO L225 Difference]: With dead ends: 1047 [2020-12-22 06:20:04,338 INFO L226 Difference]: Without dead ends: 691 [2020-12-22 06:20:04,340 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 06:20:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-12-22 06:20:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 547. [2020-12-22 06:20:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-12-22 06:20:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 957 transitions. [2020-12-22 06:20:04,412 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 957 transitions. Word has length 60 [2020-12-22 06:20:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:04,413 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 957 transitions. [2020-12-22 06:20:04,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 957 transitions. [2020-12-22 06:20:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:20:04,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:04,415 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 06:20:04,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:20:04,418 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 601234409, now seen corresponding path program 1 times [2020-12-22 06:20:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:04,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814562935] [2020-12-22 06:20:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:04,547 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 06:20:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814562935] [2020-12-22 06:20:04,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:04,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554320060] [2020-12-22 06:20:04,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:04,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:04,556 INFO L87 Difference]: Start difference. First operand 547 states and 957 transitions. Second operand 5 states. [2020-12-22 06:20:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:04,853 INFO L93 Difference]: Finished difference Result 1571 states and 2777 transitions. [2020-12-22 06:20:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:04,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-12-22 06:20:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:04,861 INFO L225 Difference]: With dead ends: 1571 [2020-12-22 06:20:04,862 INFO L226 Difference]: Without dead ends: 1055 [2020-12-22 06:20:04,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:20:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-12-22 06:20:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 547. [2020-12-22 06:20:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-12-22 06:20:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 955 transitions. [2020-12-22 06:20:04,913 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 955 transitions. Word has length 61 [2020-12-22 06:20:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:04,913 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 955 transitions. [2020-12-22 06:20:04,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 955 transitions. [2020-12-22 06:20:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:20:04,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:04,915 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 06:20:04,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:20:04,915 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:04,916 INFO L82 PathProgramCache]: Analyzing trace with hash 422054258, now seen corresponding path program 1 times [2020-12-22 06:20:04,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:04,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065859667] [2020-12-22 06:20:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:04,980 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 06:20:04,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065859667] [2020-12-22 06:20:04,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:04,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:04,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417001501] [2020-12-22 06:20:04,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:04,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:04,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:04,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:04,983 INFO L87 Difference]: Start difference. First operand 547 states and 955 transitions. Second operand 3 states. [2020-12-22 06:20:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:05,064 INFO L93 Difference]: Finished difference Result 1569 states and 2769 transitions. [2020-12-22 06:20:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:05,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:20:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:05,072 INFO L225 Difference]: With dead ends: 1569 [2020-12-22 06:20:05,073 INFO L226 Difference]: Without dead ends: 1053 [2020-12-22 06:20:05,075 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 06:20:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-12-22 06:20:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 909. [2020-12-22 06:20:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2020-12-22 06:20:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1618 transitions. [2020-12-22 06:20:05,150 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1618 transitions. Word has length 62 [2020-12-22 06:20:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:05,151 INFO L481 AbstractCegarLoop]: Abstraction has 909 states and 1618 transitions. [2020-12-22 06:20:05,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1618 transitions. [2020-12-22 06:20:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:20:05,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:05,153 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 06:20:05,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:20:05,154 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1136277356, now seen corresponding path program 1 times [2020-12-22 06:20:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:05,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360940518] [2020-12-22 06:20:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:05,304 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 06:20:05,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360940518] [2020-12-22 06:20:05,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400846230] [2020-12-22 06:20:05,305 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 06:20:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:20:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:20:06,075 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 06:20:06,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:20:06,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:20:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013944022] [2020-12-22 06:20:06,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:06,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:06,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:06,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:06,078 INFO L87 Difference]: Start difference. First operand 909 states and 1618 transitions. Second operand 5 states. [2020-12-22 06:20:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:06,251 INFO L93 Difference]: Finished difference Result 1416 states and 2482 transitions. [2020-12-22 06:20:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:20:06,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 06:20:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:06,261 INFO L225 Difference]: With dead ends: 1416 [2020-12-22 06:20:06,261 INFO L226 Difference]: Without dead ends: 1272 [2020-12-22 06:20:06,262 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 06:20:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2020-12-22 06:20:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1125. [2020-12-22 06:20:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2020-12-22 06:20:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2008 transitions. [2020-12-22 06:20:06,360 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2008 transitions. Word has length 62 [2020-12-22 06:20:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:06,360 INFO L481 AbstractCegarLoop]: Abstraction has 1125 states and 2008 transitions. [2020-12-22 06:20:06,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2008 transitions. [2020-12-22 06:20:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:20:06,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:06,369 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] [2020-12-22 06:20:06,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:20:06,584 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 390986551, now seen corresponding path program 1 times [2020-12-22 06:20:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:06,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578160479] [2020-12-22 06:20:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:06,702 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 06:20:06,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578160479] [2020-12-22 06:20:06,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:06,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123241462] [2020-12-22 06:20:06,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:06,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:06,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:06,705 INFO L87 Difference]: Start difference. First operand 1125 states and 2008 transitions. Second operand 3 states. [2020-12-22 06:20:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:06,842 INFO L93 Difference]: Finished difference Result 3009 states and 5398 transitions. [2020-12-22 06:20:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:06,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:20:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:06,856 INFO L225 Difference]: With dead ends: 3009 [2020-12-22 06:20:06,857 INFO L226 Difference]: Without dead ends: 1985 [2020-12-22 06:20:06,862 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 06:20:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-12-22 06:20:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1841. [2020-12-22 06:20:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1841 states. [2020-12-22 06:20:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 3313 transitions. [2020-12-22 06:20:06,993 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 3313 transitions. Word has length 66 [2020-12-22 06:20:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:06,994 INFO L481 AbstractCegarLoop]: Abstraction has 1841 states and 3313 transitions. [2020-12-22 06:20:06,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 3313 transitions. [2020-12-22 06:20:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:20:06,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:06,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:06,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:20:06,999 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1611877815, now seen corresponding path program 1 times [2020-12-22 06:20:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:07,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007485367] [2020-12-22 06:20:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:07,096 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 06:20:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007485367] [2020-12-22 06:20:07,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:07,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162543342] [2020-12-22 06:20:07,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:07,103 INFO L87 Difference]: Start difference. First operand 1841 states and 3313 transitions. Second operand 3 states. [2020-12-22 06:20:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:07,331 INFO L93 Difference]: Finished difference Result 4893 states and 8832 transitions. [2020-12-22 06:20:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:07,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:20:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:07,355 INFO L225 Difference]: With dead ends: 4893 [2020-12-22 06:20:07,355 INFO L226 Difference]: Without dead ends: 3187 [2020-12-22 06:20:07,359 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 06:20:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2020-12-22 06:20:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3043. [2020-12-22 06:20:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3043 states. [2020-12-22 06:20:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 5498 transitions. [2020-12-22 06:20:07,597 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 5498 transitions. Word has length 67 [2020-12-22 06:20:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:07,599 INFO L481 AbstractCegarLoop]: Abstraction has 3043 states and 5498 transitions. [2020-12-22 06:20:07,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 5498 transitions. [2020-12-22 06:20:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:20:07,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:07,604 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 06:20:07,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:20:07,604 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1959710938, now seen corresponding path program 1 times [2020-12-22 06:20:07,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:07,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020845897] [2020-12-22 06:20:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:07,686 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 06:20:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020845897] [2020-12-22 06:20:07,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:07,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:07,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893803392] [2020-12-22 06:20:07,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:07,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:07,689 INFO L87 Difference]: Start difference. First operand 3043 states and 5498 transitions. Second operand 3 states. [2020-12-22 06:20:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:08,084 INFO L93 Difference]: Finished difference Result 8215 states and 14870 transitions. [2020-12-22 06:20:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:08,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 06:20:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:08,118 INFO L225 Difference]: With dead ends: 8215 [2020-12-22 06:20:08,118 INFO L226 Difference]: Without dead ends: 5341 [2020-12-22 06:20:08,124 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 06:20:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5341 states. [2020-12-22 06:20:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5341 to 5197. [2020-12-22 06:20:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5197 states. [2020-12-22 06:20:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 9403 transitions. [2020-12-22 06:20:08,505 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 9403 transitions. Word has length 68 [2020-12-22 06:20:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:08,505 INFO L481 AbstractCegarLoop]: Abstraction has 5197 states and 9403 transitions. [2020-12-22 06:20:08,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 9403 transitions. [2020-12-22 06:20:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:20:08,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:08,514 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 06:20:08,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:20:08,514 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1840332486, now seen corresponding path program 1 times [2020-12-22 06:20:08,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:08,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812944608] [2020-12-22 06:20:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:08,604 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 06:20:08,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812944608] [2020-12-22 06:20:08,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:08,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:08,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646651489] [2020-12-22 06:20:08,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:08,607 INFO L87 Difference]: Start difference. First operand 5197 states and 9403 transitions. Second operand 3 states. [2020-12-22 06:20:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:09,185 INFO L93 Difference]: Finished difference Result 15135 states and 27427 transitions. [2020-12-22 06:20:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:09,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:20:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:09,239 INFO L225 Difference]: With dead ends: 15135 [2020-12-22 06:20:09,239 INFO L226 Difference]: Without dead ends: 10111 [2020-12-22 06:20:09,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10111 states. [2020-12-22 06:20:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10111 to 9967. [2020-12-22 06:20:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9967 states. [2020-12-22 06:20:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 18044 transitions. [2020-12-22 06:20:09,932 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 18044 transitions. Word has length 69 [2020-12-22 06:20:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:09,932 INFO L481 AbstractCegarLoop]: Abstraction has 9967 states and 18044 transitions. [2020-12-22 06:20:09,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 18044 transitions. [2020-12-22 06:20:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:20:09,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:09,940 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 06:20:09,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:20:09,940 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash 998555159, now seen corresponding path program 1 times [2020-12-22 06:20:09,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:09,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400250276] [2020-12-22 06:20:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:10,009 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 06:20:10,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400250276] [2020-12-22 06:20:10,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:10,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526629702] [2020-12-22 06:20:10,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:10,011 INFO L87 Difference]: Start difference. First operand 9967 states and 18044 transitions. Second operand 3 states. [2020-12-22 06:20:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:11,104 INFO L93 Difference]: Finished difference Result 29147 states and 52825 transitions. [2020-12-22 06:20:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:11,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:20:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:11,177 INFO L225 Difference]: With dead ends: 29147 [2020-12-22 06:20:11,177 INFO L226 Difference]: Without dead ends: 19361 [2020-12-22 06:20:11,196 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 06:20:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19361 states. [2020-12-22 06:20:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19361 to 19217. [2020-12-22 06:20:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19217 states. [2020-12-22 06:20:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19217 states to 19217 states and 34781 transitions. [2020-12-22 06:20:12,548 INFO L78 Accepts]: Start accepts. Automaton has 19217 states and 34781 transitions. Word has length 70 [2020-12-22 06:20:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:12,548 INFO L481 AbstractCegarLoop]: Abstraction has 19217 states and 34781 transitions. [2020-12-22 06:20:12,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 19217 states and 34781 transitions. [2020-12-22 06:20:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:20:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:12,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:12,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:20:12,557 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1854509244, now seen corresponding path program 1 times [2020-12-22 06:20:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:12,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659184252] [2020-12-22 06:20:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:12,635 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 06:20:12,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659184252] [2020-12-22 06:20:12,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:12,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199358928] [2020-12-22 06:20:12,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:12,638 INFO L87 Difference]: Start difference. First operand 19217 states and 34781 transitions. Second operand 3 states. [2020-12-22 06:20:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:14,812 INFO L93 Difference]: Finished difference Result 57083 states and 103350 transitions. [2020-12-22 06:20:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:14,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:20:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:14,940 INFO L225 Difference]: With dead ends: 57083 [2020-12-22 06:20:14,940 INFO L226 Difference]: Without dead ends: 38051 [2020-12-22 06:20:14,979 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 06:20:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38051 states. [2020-12-22 06:20:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38051 to 37907. [2020-12-22 06:20:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37907 states. [2020-12-22 06:20:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68510 transitions. [2020-12-22 06:20:17,198 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68510 transitions. Word has length 71 [2020-12-22 06:20:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:17,198 INFO L481 AbstractCegarLoop]: Abstraction has 37907 states and 68510 transitions. [2020-12-22 06:20:17,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68510 transitions. [2020-12-22 06:20:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:20:17,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:17,211 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 06:20:17,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:20:17,211 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2033361680, now seen corresponding path program 1 times [2020-12-22 06:20:17,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:17,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910850608] [2020-12-22 06:20:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:17,317 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 06:20:17,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910850608] [2020-12-22 06:20:17,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:17,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:17,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833664182] [2020-12-22 06:20:17,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:17,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:17,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:17,320 INFO L87 Difference]: Start difference. First operand 37907 states and 68510 transitions. Second operand 5 states. [2020-12-22 06:20:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:20,364 INFO L93 Difference]: Finished difference Result 111424 states and 201343 transitions. [2020-12-22 06:20:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:20:20,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 06:20:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:20,603 INFO L225 Difference]: With dead ends: 111424 [2020-12-22 06:20:20,603 INFO L226 Difference]: Without dead ends: 73770 [2020-12-22 06:20:20,656 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 06:20:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2020-12-22 06:20:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 37907. [2020-12-22 06:20:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37907 states. [2020-12-22 06:20:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68252 transitions. [2020-12-22 06:20:23,512 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68252 transitions. Word has length 72 [2020-12-22 06:20:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:23,513 INFO L481 AbstractCegarLoop]: Abstraction has 37907 states and 68252 transitions. [2020-12-22 06:20:23,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68252 transitions. [2020-12-22 06:20:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:20:23,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:23,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:23,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:20:23,522 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash 703274002, now seen corresponding path program 2 times [2020-12-22 06:20:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:23,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922790943] [2020-12-22 06:20:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:23,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922790943] [2020-12-22 06:20:23,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:23,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:23,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247566747] [2020-12-22 06:20:23,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:23,607 INFO L87 Difference]: Start difference. First operand 37907 states and 68252 transitions. Second operand 5 states. [2020-12-22 06:20:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:25,680 INFO L93 Difference]: Finished difference Result 75699 states and 136304 transitions. [2020-12-22 06:20:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:25,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 06:20:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:25,797 INFO L225 Difference]: With dead ends: 75699 [2020-12-22 06:20:25,797 INFO L226 Difference]: Without dead ends: 38051 [2020-12-22 06:20:25,843 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 06:20:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38051 states. [2020-12-22 06:20:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38051 to 37907. [2020-12-22 06:20:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37907 states. [2020-12-22 06:20:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37907 states to 37907 states and 68124 transitions. [2020-12-22 06:20:27,815 INFO L78 Accepts]: Start accepts. Automaton has 37907 states and 68124 transitions. Word has length 72 [2020-12-22 06:20:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:27,815 INFO L481 AbstractCegarLoop]: Abstraction has 37907 states and 68124 transitions. [2020-12-22 06:20:27,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 37907 states and 68124 transitions. [2020-12-22 06:20:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:20:27,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:27,825 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 06:20:27,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:20:27,825 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:27,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1868125957, now seen corresponding path program 1 times [2020-12-22 06:20:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:27,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769038190] [2020-12-22 06:20:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:27,896 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 06:20:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769038190] [2020-12-22 06:20:27,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:27,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:27,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562418711] [2020-12-22 06:20:27,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:27,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:27,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:27,898 INFO L87 Difference]: Start difference. First operand 37907 states and 68124 transitions. Second operand 3 states. [2020-12-22 06:20:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:31,069 INFO L93 Difference]: Finished difference Result 105309 states and 188986 transitions. [2020-12-22 06:20:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:31,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:20:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:31,239 INFO L225 Difference]: With dead ends: 105309 [2020-12-22 06:20:31,240 INFO L226 Difference]: Without dead ends: 67621 [2020-12-22 06:20:31,309 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 06:20:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67621 states. [2020-12-22 06:20:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67621 to 67477. [2020-12-22 06:20:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67477 states. [2020-12-22 06:20:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67477 states to 67477 states and 120733 transitions. [2020-12-22 06:20:34,754 INFO L78 Accepts]: Start accepts. Automaton has 67477 states and 120733 transitions. Word has length 72 [2020-12-22 06:20:34,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:34,754 INFO L481 AbstractCegarLoop]: Abstraction has 67477 states and 120733 transitions. [2020-12-22 06:20:34,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:34,754 INFO L276 IsEmpty]: Start isEmpty. Operand 67477 states and 120733 transitions. [2020-12-22 06:20:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:20:34,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:34,763 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 06:20:34,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:20:34,764 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1193061364, now seen corresponding path program 1 times [2020-12-22 06:20:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:34,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656715733] [2020-12-22 06:20:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:34,896 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 06:20:34,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656715733] [2020-12-22 06:20:34,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:34,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:20:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069485036] [2020-12-22 06:20:34,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:20:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:20:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:20:34,898 INFO L87 Difference]: Start difference. First operand 67477 states and 120733 transitions. Second operand 6 states. [2020-12-22 06:20:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:37,857 INFO L93 Difference]: Finished difference Result 67562 states and 120866 transitions. [2020-12-22 06:20:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:20:37,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-22 06:20:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:37,979 INFO L225 Difference]: With dead ends: 67562 [2020-12-22 06:20:37,980 INFO L226 Difference]: Without dead ends: 67477 [2020-12-22 06:20:37,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:20:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67477 states. [2020-12-22 06:20:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67477 to 67477. [2020-12-22 06:20:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67477 states. [2020-12-22 06:20:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67477 states to 67477 states and 120731 transitions. [2020-12-22 06:20:41,016 INFO L78 Accepts]: Start accepts. Automaton has 67477 states and 120731 transitions. Word has length 73 [2020-12-22 06:20:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 67477 states and 120731 transitions. [2020-12-22 06:20:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:20:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 67477 states and 120731 transitions. [2020-12-22 06:20:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:20:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:41,027 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 06:20:41,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:20:41,027 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1185431247, now seen corresponding path program 1 times [2020-12-22 06:20:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:41,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727519990] [2020-12-22 06:20:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:41,216 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 06:20:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727519990] [2020-12-22 06:20:41,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:41,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 06:20:41,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985212241] [2020-12-22 06:20:41,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 06:20:41,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 06:20:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:20:41,218 INFO L87 Difference]: Start difference. First operand 67477 states and 120731 transitions. Second operand 11 states. [2020-12-22 06:20:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:45,586 INFO L93 Difference]: Finished difference Result 68440 states and 122274 transitions. [2020-12-22 06:20:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 06:20:45,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-12-22 06:20:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:45,697 INFO L225 Difference]: With dead ends: 68440 [2020-12-22 06:20:45,698 INFO L226 Difference]: Without dead ends: 68360 [2020-12-22 06:20:45,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=466, Invalid=1340, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 06:20:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68360 states. [2020-12-22 06:20:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68360 to 67570. [2020-12-22 06:20:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67570 states. [2020-12-22 06:20:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67570 states to 67570 states and 120882 transitions. [2020-12-22 06:20:48,847 INFO L78 Accepts]: Start accepts. Automaton has 67570 states and 120882 transitions. Word has length 76 [2020-12-22 06:20:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:48,847 INFO L481 AbstractCegarLoop]: Abstraction has 67570 states and 120882 transitions. [2020-12-22 06:20:48,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 06:20:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 67570 states and 120882 transitions. [2020-12-22 06:20:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:20:48,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:48,857 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 06:20:48,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:20:48,858 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash -391825552, now seen corresponding path program 1 times [2020-12-22 06:20:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:48,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670223151] [2020-12-22 06:20:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:48,991 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 06:20:48,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670223151] [2020-12-22 06:20:48,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:20:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989476012] [2020-12-22 06:20:48,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:20:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:20:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:20:48,993 INFO L87 Difference]: Start difference. First operand 67570 states and 120882 transitions. Second operand 6 states. [2020-12-22 06:20:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:51,490 INFO L93 Difference]: Finished difference Result 67667 states and 121041 transitions. [2020-12-22 06:20:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:20:51,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 06:20:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:51,491 INFO L225 Difference]: With dead ends: 67667 [2020-12-22 06:20:51,491 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 06:20:51,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:20:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 06:20:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 06:20:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 06:20:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 06:20:51,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-12-22 06:20:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:51,526 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 06:20:51,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:20:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 06:20:51,526 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 06:20:51,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:20:51,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 06:20:51,873 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 139 [2020-12-22 06:20:51,993 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 06:20:52,251 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2020-12-22 06:20:56,304 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 712 DAG size of output: 638 [2020-12-22 06:21:06,832 WARN L197 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 1366 DAG size of output: 1177 [2020-12-22 06:21:17,050 WARN L197 SmtUtils]: Spent 10.20 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:21:19,858 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 1096 DAG size of output: 789 [2020-12-22 06:21:30,106 WARN L197 SmtUtils]: Spent 10.24 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:21:39,929 WARN L197 SmtUtils]: Spent 9.81 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:21:49,699 WARN L197 SmtUtils]: Spent 9.76 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:21:52,727 WARN L197 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:21:55,510 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 712 DAG size of output: 654 [2020-12-22 06:22:05,259 WARN L197 SmtUtils]: Spent 9.66 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:15,110 WARN L197 SmtUtils]: Spent 9.60 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:24,936 WARN L197 SmtUtils]: Spent 9.64 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:34,590 WARN L197 SmtUtils]: Spent 9.56 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:44,307 WARN L197 SmtUtils]: Spent 9.59 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:53,936 WARN L197 SmtUtils]: Spent 9.62 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:22:56,649 WARN L197 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 712 DAG size of output: 654 [2020-12-22 06:22:59,316 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 712 DAG size of output: 638 [2020-12-22 06:23:00,663 WARN L197 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 328 DAG size of output: 320 [2020-12-22 06:23:03,256 WARN L197 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 712 DAG size of output: 638 [2020-12-22 06:23:13,136 WARN L197 SmtUtils]: Spent 9.83 s on a formula simplification. DAG size of input: 1355 DAG size of output: 1168 [2020-12-22 06:23:15,646 WARN L197 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1096 DAG size of output: 789 [2020-12-22 06:23:18,154 WARN L197 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1096 DAG size of output: 789 [2020-12-22 06:23:20,899 WARN L197 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:22,349 WARN L197 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 328 DAG size of output: 320 [2020-12-22 06:23:25,031 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:27,625 WARN L197 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 712 DAG size of output: 654 [2020-12-22 06:23:30,375 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:33,142 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:35,751 WARN L197 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:38,472 WARN L197 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 712 DAG size of output: 654 [2020-12-22 06:23:41,039 WARN L197 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 712 DAG size of output: 638 [2020-12-22 06:23:43,680 WARN L197 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:23:46,168 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 1096 DAG size of output: 789 [2020-12-22 06:23:55,575 WARN L197 SmtUtils]: Spent 9.40 s on a formula simplification. DAG size of input: 1352 DAG size of output: 1165 [2020-12-22 06:23:58,183 WARN L197 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 709 DAG size of output: 699 [2020-12-22 06:24:00,847 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 712 DAG size of output: 654 [2020-12-22 06:24:03,522 WARN L197 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 712 DAG size of output: 638 [2020-12-22 06:24:05,993 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 1096 DAG size of output: 789