/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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:21:31,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:21:31,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:21:31,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:21:31,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:21:31,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:21:31,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:21:31,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:21:31,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:21:31,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:21:31,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:21:31,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:21:31,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:21:31,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:21:31,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:21:31,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:21:31,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:21:31,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:21:31,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:21:31,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:21:31,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:21:31,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:21:31,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:21:31,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:21:31,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:21:31,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:21:31,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:21:31,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:21:31,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:21:31,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:21:31,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:21:31,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:21:31,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:21:31,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:21:31,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:21:31,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:21:31,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:21:31,663 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:21:31,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:21:31,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:21:31,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:21:31,666 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:21:31,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:21:31,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:21:31,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:21:31,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:21:31,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:21:31,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:21:31,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:21:31,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:21:31,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:21:31,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:21:31,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:21:31,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:21:31,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:21:31,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:21:31,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:21:31,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:21:31,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:21:31,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:21:31,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:21:31,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:21:31,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:21:32,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:21:32,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:21:32,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:21:32,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:21:32,157 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:21:32,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2020-12-22 06:21:32,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117ecd638/9ff3faf3f8ac4778b4cb0275cbef0c09/FLAGb0166076b [2020-12-22 06:21:33,096 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:21:33,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product30.cil.c [2020-12-22 06:21:33,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117ecd638/9ff3faf3f8ac4778b4cb0275cbef0c09/FLAGb0166076b [2020-12-22 06:21:33,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117ecd638/9ff3faf3f8ac4778b4cb0275cbef0c09 [2020-12-22 06:21:33,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:21:33,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:21:33,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:21:33,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:21:33,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:21:33,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:21:33" (1/1) ... [2020-12-22 06:21:33,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5def595e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:33, skipping insertion in model container [2020-12-22 06:21:33,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:21:33" (1/1) ... [2020-12-22 06:21:33,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:21:33,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:21:33,984 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_product30.cil.c[29183,29196] [2020-12-22 06:21:34,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:21:34,180 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:21:34,273 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_product30.cil.c[29183,29196] [2020-12-22 06:21:34,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:21:34,409 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:21:34,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34 WrapperNode [2020-12-22 06:21:34,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:21:34,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:21:34,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:21:34,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:21:34,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:21:34,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:21:34,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:21:34,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:21:34,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (1/1) ... [2020-12-22 06:21:34,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:21:34,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:21:34,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:21:34,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:21:34,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (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 06:21:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:21:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:21:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:21:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:21:34,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:21:37,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:21:37,128 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2020-12-22 06:21:37,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:21:37 BoogieIcfgContainer [2020-12-22 06:21:37,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:21:37,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:21:37,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:21:37,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:21:37,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:21:33" (1/3) ... [2020-12-22 06:21:37,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b05049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:21:37, skipping insertion in model container [2020-12-22 06:21:37,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:21:34" (2/3) ... [2020-12-22 06:21:37,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b05049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:21:37, skipping insertion in model container [2020-12-22 06:21:37,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:21:37" (3/3) ... [2020-12-22 06:21:37,140 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product30.cil.c [2020-12-22 06:21:37,147 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:21:37,154 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:21:37,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:21:37,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:21:37,206 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:21:37,206 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:21:37,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:21:37,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:21:37,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:21:37,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:21:37,207 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:21:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states. [2020-12-22 06:21:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:21:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:37,253 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] [2020-12-22 06:21:37,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:37,260 INFO L82 PathProgramCache]: Analyzing trace with hash -564584514, now seen corresponding path program 1 times [2020-12-22 06:21:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358914620] [2020-12-22 06:21:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:37,797 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 06:21:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358914620] [2020-12-22 06:21:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386679325] [2020-12-22 06:21:37,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:37,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:37,833 INFO L87 Difference]: Start difference. First operand 501 states. Second operand 3 states. [2020-12-22 06:21:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:38,026 INFO L93 Difference]: Finished difference Result 1468 states and 2564 transitions. [2020-12-22 06:21:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:38,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:21:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:38,054 INFO L225 Difference]: With dead ends: 1468 [2020-12-22 06:21:38,055 INFO L226 Difference]: Without dead ends: 960 [2020-12-22 06:21:38,062 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 06:21:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2020-12-22 06:21:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 489. [2020-12-22 06:21:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 848 transitions. [2020-12-22 06:21:38,151 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 848 transitions. Word has length 62 [2020-12-22 06:21:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:38,152 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 848 transitions. [2020-12-22 06:21:38,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 848 transitions. [2020-12-22 06:21:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:21:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:38,157 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] [2020-12-22 06:21:38,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:21:38,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash 425691729, now seen corresponding path program 1 times [2020-12-22 06:21:38,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:38,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530648849] [2020-12-22 06:21:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:38,358 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 06:21:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530648849] [2020-12-22 06:21:38,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:38,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:21:38,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337760396] [2020-12-22 06:21:38,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:38,364 INFO L87 Difference]: Start difference. First operand 489 states and 848 transitions. Second operand 5 states. [2020-12-22 06:21:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:38,597 INFO L93 Difference]: Finished difference Result 1416 states and 2460 transitions. [2020-12-22 06:21:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:21:38,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:21:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:38,607 INFO L225 Difference]: With dead ends: 1416 [2020-12-22 06:21:38,607 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 06:21:38,614 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 06:21:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 06:21:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 489. [2020-12-22 06:21:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2020-12-22 06:21:38,661 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 64 [2020-12-22 06:21:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:38,662 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2020-12-22 06:21:38,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2020-12-22 06:21:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:21:38,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:38,669 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] [2020-12-22 06:21:38,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:21:38,670 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash -886473314, now seen corresponding path program 1 times [2020-12-22 06:21:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312865815] [2020-12-22 06:21:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:38,820 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 06:21:38,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312865815] [2020-12-22 06:21:38,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:38,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632027116] [2020-12-22 06:21:38,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:38,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:38,826 INFO L87 Difference]: Start difference. First operand 489 states and 847 transitions. Second operand 3 states. [2020-12-22 06:21:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:38,872 INFO L93 Difference]: Finished difference Result 960 states and 1668 transitions. [2020-12-22 06:21:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:38,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:21:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:38,876 INFO L225 Difference]: With dead ends: 960 [2020-12-22 06:21:38,876 INFO L226 Difference]: Without dead ends: 494 [2020-12-22 06:21:38,878 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 06:21:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-22 06:21:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 489. [2020-12-22 06:21:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 846 transitions. [2020-12-22 06:21:38,906 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 846 transitions. Word has length 65 [2020-12-22 06:21:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:38,914 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 846 transitions. [2020-12-22 06:21:38,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 846 transitions. [2020-12-22 06:21:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:21:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:38,917 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 06:21:38,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:21:38,918 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash 981403236, now seen corresponding path program 1 times [2020-12-22 06:21:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960381012] [2020-12-22 06:21:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:39,035 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 06:21:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960381012] [2020-12-22 06:21:39,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:39,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:39,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77970674] [2020-12-22 06:21:39,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:39,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:39,038 INFO L87 Difference]: Start difference. First operand 489 states and 846 transitions. Second operand 3 states. [2020-12-22 06:21:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:39,084 INFO L93 Difference]: Finished difference Result 970 states and 1681 transitions. [2020-12-22 06:21:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:39,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:21:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:39,088 INFO L225 Difference]: With dead ends: 970 [2020-12-22 06:21:39,089 INFO L226 Difference]: Without dead ends: 489 [2020-12-22 06:21:39,090 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 06:21:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-12-22 06:21:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 489. [2020-12-22 06:21:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 844 transitions. [2020-12-22 06:21:39,151 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 844 transitions. Word has length 66 [2020-12-22 06:21:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:39,153 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 844 transitions. [2020-12-22 06:21:39,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 844 transitions. [2020-12-22 06:21:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:21:39,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:39,155 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 06:21:39,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:21:39,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1848300793, now seen corresponding path program 1 times [2020-12-22 06:21:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:39,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428879902] [2020-12-22 06:21:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:39,270 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 06:21:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428879902] [2020-12-22 06:21:39,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:39,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:21:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320358211] [2020-12-22 06:21:39,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:39,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:39,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:39,274 INFO L87 Difference]: Start difference. First operand 489 states and 844 transitions. Second operand 5 states. [2020-12-22 06:21:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:39,442 INFO L93 Difference]: Finished difference Result 1406 states and 2440 transitions. [2020-12-22 06:21:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:21:39,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 06:21:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:39,451 INFO L225 Difference]: With dead ends: 1406 [2020-12-22 06:21:39,451 INFO L226 Difference]: Without dead ends: 944 [2020-12-22 06:21:39,453 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 06:21:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-12-22 06:21:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 489. [2020-12-22 06:21:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 843 transitions. [2020-12-22 06:21:39,483 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 843 transitions. Word has length 67 [2020-12-22 06:21:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:39,483 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 843 transitions. [2020-12-22 06:21:39,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 843 transitions. [2020-12-22 06:21:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:21:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:39,485 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 06:21:39,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:21:39,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash -243159652, now seen corresponding path program 1 times [2020-12-22 06:21:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:39,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29638250] [2020-12-22 06:21:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:39,584 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 06:21:39,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29638250] [2020-12-22 06:21:39,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:39,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:21:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270951228] [2020-12-22 06:21:39,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:39,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:39,587 INFO L87 Difference]: Start difference. First operand 489 states and 843 transitions. Second operand 5 states. [2020-12-22 06:21:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:39,810 INFO L93 Difference]: Finished difference Result 1411 states and 2445 transitions. [2020-12-22 06:21:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:21:39,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 06:21:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:39,817 INFO L225 Difference]: With dead ends: 1411 [2020-12-22 06:21:39,817 INFO L226 Difference]: Without dead ends: 949 [2020-12-22 06:21:39,819 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 06:21:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2020-12-22 06:21:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 489. [2020-12-22 06:21:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-22 06:21:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 842 transitions. [2020-12-22 06:21:39,863 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 842 transitions. Word has length 68 [2020-12-22 06:21:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:39,863 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 842 transitions. [2020-12-22 06:21:39,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 842 transitions. [2020-12-22 06:21:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:21:39,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:39,865 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 06:21:39,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:21:39,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash -100986188, now seen corresponding path program 1 times [2020-12-22 06:21:39,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:39,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656839812] [2020-12-22 06:21:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:40,000 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 06:21:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656839812] [2020-12-22 06:21:40,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:40,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083452636] [2020-12-22 06:21:40,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:40,004 INFO L87 Difference]: Start difference. First operand 489 states and 842 transitions. Second operand 3 states. [2020-12-22 06:21:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:40,047 INFO L93 Difference]: Finished difference Result 740 states and 1260 transitions. [2020-12-22 06:21:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:40,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:21:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:40,051 INFO L225 Difference]: With dead ends: 740 [2020-12-22 06:21:40,051 INFO L226 Difference]: Without dead ends: 492 [2020-12-22 06:21:40,053 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 06:21:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-12-22 06:21:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 491. [2020-12-22 06:21:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 06:21:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 844 transitions. [2020-12-22 06:21:40,086 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 844 transitions. Word has length 69 [2020-12-22 06:21:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:40,087 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 844 transitions. [2020-12-22 06:21:40,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 844 transitions. [2020-12-22 06:21:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:21:40,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:40,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:40,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:21:40,089 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash 174861602, now seen corresponding path program 1 times [2020-12-22 06:21:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:40,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45997675] [2020-12-22 06:21:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:40,159 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 06:21:40,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45997675] [2020-12-22 06:21:40,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:40,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:40,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518364263] [2020-12-22 06:21:40,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:40,162 INFO L87 Difference]: Start difference. First operand 491 states and 844 transitions. Second operand 3 states. [2020-12-22 06:21:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:40,225 INFO L93 Difference]: Finished difference Result 1359 states and 2356 transitions. [2020-12-22 06:21:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:40,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 06:21:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:40,231 INFO L225 Difference]: With dead ends: 1359 [2020-12-22 06:21:40,231 INFO L226 Difference]: Without dead ends: 899 [2020-12-22 06:21:40,232 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 06:21:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-12-22 06:21:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 651. [2020-12-22 06:21:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-12-22 06:21:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1137 transitions. [2020-12-22 06:21:40,273 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1137 transitions. Word has length 77 [2020-12-22 06:21:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:40,274 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 1137 transitions. [2020-12-22 06:21:40,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1137 transitions. [2020-12-22 06:21:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:21:40,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:40,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:40,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:21:40,276 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:40,277 INFO L82 PathProgramCache]: Analyzing trace with hash 910595777, now seen corresponding path program 1 times [2020-12-22 06:21:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:40,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756022925] [2020-12-22 06:21:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:40,365 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 06:21:40,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756022925] [2020-12-22 06:21:40,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:40,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:21:40,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273280986] [2020-12-22 06:21:40,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:40,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:40,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:40,368 INFO L87 Difference]: Start difference. First operand 651 states and 1137 transitions. Second operand 5 states. [2020-12-22 06:21:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:40,651 INFO L93 Difference]: Finished difference Result 1883 states and 3317 transitions. [2020-12-22 06:21:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:21:40,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-12-22 06:21:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:40,659 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 06:21:40,659 INFO L226 Difference]: Without dead ends: 1263 [2020-12-22 06:21:40,661 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 06:21:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2020-12-22 06:21:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 651. [2020-12-22 06:21:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2020-12-22 06:21:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1135 transitions. [2020-12-22 06:21:40,716 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1135 transitions. Word has length 78 [2020-12-22 06:21:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:40,717 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 1135 transitions. [2020-12-22 06:21:40,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1135 transitions. [2020-12-22 06:21:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:21:40,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:40,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:40,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:21:40,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1384231848, now seen corresponding path program 1 times [2020-12-22 06:21:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:40,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834933620] [2020-12-22 06:21:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:40,806 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 06:21:40,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834933620] [2020-12-22 06:21:40,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:40,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871223622] [2020-12-22 06:21:40,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:40,808 INFO L87 Difference]: Start difference. First operand 651 states and 1135 transitions. Second operand 3 states. [2020-12-22 06:21:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:40,902 INFO L93 Difference]: Finished difference Result 1881 states and 3309 transitions. [2020-12-22 06:21:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:40,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 06:21:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:40,910 INFO L225 Difference]: With dead ends: 1881 [2020-12-22 06:21:40,911 INFO L226 Difference]: Without dead ends: 1261 [2020-12-22 06:21:40,916 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 06:21:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2020-12-22 06:21:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1013. [2020-12-22 06:21:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2020-12-22 06:21:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1798 transitions. [2020-12-22 06:21:40,999 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1798 transitions. Word has length 79 [2020-12-22 06:21:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:40,999 INFO L481 AbstractCegarLoop]: Abstraction has 1013 states and 1798 transitions. [2020-12-22 06:21:41,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1798 transitions. [2020-12-22 06:21:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:21:41,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:41,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:41,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:21:41,003 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash -82414218, now seen corresponding path program 1 times [2020-12-22 06:21:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:41,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415674485] [2020-12-22 06:21:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:41,153 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 06:21:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415674485] [2020-12-22 06:21:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541943239] [2020-12-22 06:21:41,154 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 06:21:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:21:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:21:41,723 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 06:21:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:21:41,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:21:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244949648] [2020-12-22 06:21:41,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:41,725 INFO L87 Difference]: Start difference. First operand 1013 states and 1798 transitions. Second operand 5 states. [2020-12-22 06:21:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:41,879 INFO L93 Difference]: Finished difference Result 1728 states and 3022 transitions. [2020-12-22 06:21:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:21:41,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 06:21:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:41,888 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 06:21:41,889 INFO L226 Difference]: Without dead ends: 1480 [2020-12-22 06:21:41,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 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 06:21:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-12-22 06:21:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1229. [2020-12-22 06:21:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1229 states. [2020-12-22 06:21:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2188 transitions. [2020-12-22 06:21:41,979 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2188 transitions. Word has length 79 [2020-12-22 06:21:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:41,980 INFO L481 AbstractCegarLoop]: Abstraction has 1229 states and 2188 transitions. [2020-12-22 06:21:41,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2188 transitions. [2020-12-22 06:21:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 06:21:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:41,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:42,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:21:42,197 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1206158029, now seen corresponding path program 1 times [2020-12-22 06:21:42,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:42,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618198593] [2020-12-22 06:21:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:42,273 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 06:21:42,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618198593] [2020-12-22 06:21:42,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:42,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:42,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735273768] [2020-12-22 06:21:42,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:42,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:42,275 INFO L87 Difference]: Start difference. First operand 1229 states and 2188 transitions. Second operand 3 states. [2020-12-22 06:21:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:42,438 INFO L93 Difference]: Finished difference Result 3321 states and 5938 transitions. [2020-12-22 06:21:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:42,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 06:21:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:42,453 INFO L225 Difference]: With dead ends: 3321 [2020-12-22 06:21:42,453 INFO L226 Difference]: Without dead ends: 2193 [2020-12-22 06:21:42,457 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 06:21:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2020-12-22 06:21:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1945. [2020-12-22 06:21:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2020-12-22 06:21:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3493 transitions. [2020-12-22 06:21:42,706 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3493 transitions. Word has length 83 [2020-12-22 06:21:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:42,709 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 3493 transitions. [2020-12-22 06:21:42,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3493 transitions. [2020-12-22 06:21:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:21:42,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:42,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:42,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:21:42,722 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1968536243, now seen corresponding path program 1 times [2020-12-22 06:21:42,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:42,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864911570] [2020-12-22 06:21:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:42,858 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 06:21:42,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864911570] [2020-12-22 06:21:42,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:42,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:42,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684468742] [2020-12-22 06:21:42,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:42,866 INFO L87 Difference]: Start difference. First operand 1945 states and 3493 transitions. Second operand 3 states. [2020-12-22 06:21:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:43,101 INFO L93 Difference]: Finished difference Result 5205 states and 9372 transitions. [2020-12-22 06:21:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:43,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 06:21:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:43,123 INFO L225 Difference]: With dead ends: 5205 [2020-12-22 06:21:43,124 INFO L226 Difference]: Without dead ends: 3395 [2020-12-22 06:21:43,129 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 06:21:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2020-12-22 06:21:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3147. [2020-12-22 06:21:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3147 states. [2020-12-22 06:21:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 5678 transitions. [2020-12-22 06:21:43,408 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 5678 transitions. Word has length 84 [2020-12-22 06:21:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:43,408 INFO L481 AbstractCegarLoop]: Abstraction has 3147 states and 5678 transitions. [2020-12-22 06:21:43,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 5678 transitions. [2020-12-22 06:21:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 06:21:43,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:43,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:43,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:21:43,419 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1160329948, now seen corresponding path program 1 times [2020-12-22 06:21:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:43,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502520881] [2020-12-22 06:21:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:43,508 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 06:21:43,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502520881] [2020-12-22 06:21:43,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:43,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535228769] [2020-12-22 06:21:43,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:43,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:43,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:43,511 INFO L87 Difference]: Start difference. First operand 3147 states and 5678 transitions. Second operand 3 states. [2020-12-22 06:21:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:43,906 INFO L93 Difference]: Finished difference Result 8527 states and 15410 transitions. [2020-12-22 06:21:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:43,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 06:21:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:43,937 INFO L225 Difference]: With dead ends: 8527 [2020-12-22 06:21:43,938 INFO L226 Difference]: Without dead ends: 5549 [2020-12-22 06:21:43,944 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 06:21:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2020-12-22 06:21:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 5301. [2020-12-22 06:21:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5301 states. [2020-12-22 06:21:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 9583 transitions. [2020-12-22 06:21:44,327 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 9583 transitions. Word has length 85 [2020-12-22 06:21:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:44,327 INFO L481 AbstractCegarLoop]: Abstraction has 5301 states and 9583 transitions. [2020-12-22 06:21:44,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 9583 transitions. [2020-12-22 06:21:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 06:21:44,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:44,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:44,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:21:44,339 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1882986108, now seen corresponding path program 1 times [2020-12-22 06:21:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:44,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106103938] [2020-12-22 06:21:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:44,412 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 06:21:44,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106103938] [2020-12-22 06:21:44,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:44,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283576261] [2020-12-22 06:21:44,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:44,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:44,459 INFO L87 Difference]: Start difference. First operand 5301 states and 9583 transitions. Second operand 3 states. [2020-12-22 06:21:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:45,127 INFO L93 Difference]: Finished difference Result 15447 states and 27967 transitions. [2020-12-22 06:21:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:45,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 06:21:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:45,186 INFO L225 Difference]: With dead ends: 15447 [2020-12-22 06:21:45,186 INFO L226 Difference]: Without dead ends: 10319 [2020-12-22 06:21:45,197 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 06:21:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10319 states. [2020-12-22 06:21:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10319 to 10071. [2020-12-22 06:21:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10071 states. [2020-12-22 06:21:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10071 states to 10071 states and 18224 transitions. [2020-12-22 06:21:46,002 INFO L78 Accepts]: Start accepts. Automaton has 10071 states and 18224 transitions. Word has length 86 [2020-12-22 06:21:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:46,003 INFO L481 AbstractCegarLoop]: Abstraction has 10071 states and 18224 transitions. [2020-12-22 06:21:46,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10071 states and 18224 transitions. [2020-12-22 06:21:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 06:21:46,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:46,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:46,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:21:46,018 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1403442771, now seen corresponding path program 1 times [2020-12-22 06:21:46,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:46,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657331769] [2020-12-22 06:21:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:46,089 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 06:21:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657331769] [2020-12-22 06:21:46,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:46,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774226355] [2020-12-22 06:21:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:46,091 INFO L87 Difference]: Start difference. First operand 10071 states and 18224 transitions. Second operand 3 states. [2020-12-22 06:21:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:47,168 INFO L93 Difference]: Finished difference Result 29459 states and 53365 transitions. [2020-12-22 06:21:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:47,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 06:21:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:47,231 INFO L225 Difference]: With dead ends: 29459 [2020-12-22 06:21:47,232 INFO L226 Difference]: Without dead ends: 19569 [2020-12-22 06:21:47,251 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 06:21:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19569 states. [2020-12-22 06:21:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19569 to 19321. [2020-12-22 06:21:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19321 states. [2020-12-22 06:21:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19321 states to 19321 states and 34961 transitions. [2020-12-22 06:21:48,575 INFO L78 Accepts]: Start accepts. Automaton has 19321 states and 34961 transitions. Word has length 87 [2020-12-22 06:21:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:48,576 INFO L481 AbstractCegarLoop]: Abstraction has 19321 states and 34961 transitions. [2020-12-22 06:21:48,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 19321 states and 34961 transitions. [2020-12-22 06:21:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 06:21:48,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:48,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:48,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:21:48,599 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash -388889402, now seen corresponding path program 1 times [2020-12-22 06:21:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572019359] [2020-12-22 06:21:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:48,690 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 06:21:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572019359] [2020-12-22 06:21:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444770185] [2020-12-22 06:21:48,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:48,693 INFO L87 Difference]: Start difference. First operand 19321 states and 34961 transitions. Second operand 3 states. [2020-12-22 06:21:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:50,358 INFO L93 Difference]: Finished difference Result 57395 states and 103890 transitions. [2020-12-22 06:21:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:21:50,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 06:21:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:50,494 INFO L225 Difference]: With dead ends: 57395 [2020-12-22 06:21:50,495 INFO L226 Difference]: Without dead ends: 38259 [2020-12-22 06:21:50,530 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 06:21:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38259 states. [2020-12-22 06:21:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38259 to 38011. [2020-12-22 06:21:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38011 states. [2020-12-22 06:21:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38011 states to 38011 states and 68690 transitions. [2020-12-22 06:21:52,817 INFO L78 Accepts]: Start accepts. Automaton has 38011 states and 68690 transitions. Word has length 88 [2020-12-22 06:21:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:52,817 INFO L481 AbstractCegarLoop]: Abstraction has 38011 states and 68690 transitions. [2020-12-22 06:21:52,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:21:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 38011 states and 68690 transitions. [2020-12-22 06:21:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:21:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:52,851 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:52,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:21:52,852 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1432968038, now seen corresponding path program 1 times [2020-12-22 06:21:52,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:52,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675556160] [2020-12-22 06:21:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:52,954 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 06:21:52,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675556160] [2020-12-22 06:21:52,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:52,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:21:52,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816534993] [2020-12-22 06:21:52,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:21:52,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:21:52,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:21:52,957 INFO L87 Difference]: Start difference. First operand 38011 states and 68690 transitions. Second operand 5 states. [2020-12-22 06:21:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:55,887 INFO L93 Difference]: Finished difference Result 111736 states and 201883 transitions. [2020-12-22 06:21:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:21:55,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-12-22 06:21:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:56,227 INFO L225 Difference]: With dead ends: 111736 [2020-12-22 06:21:56,227 INFO L226 Difference]: Without dead ends: 73978 [2020-12-22 06:21:56,313 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 06:21:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73978 states. [2020-12-22 06:21:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73978 to 38011. [2020-12-22 06:21:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38011 states. [2020-12-22 06:21:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38011 states to 38011 states and 68432 transitions. [2020-12-22 06:21:58,619 INFO L78 Accepts]: Start accepts. Automaton has 38011 states and 68432 transitions. Word has length 89 [2020-12-22 06:21:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:58,619 INFO L481 AbstractCegarLoop]: Abstraction has 38011 states and 68432 transitions. [2020-12-22 06:21:58,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:21:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38011 states and 68432 transitions. [2020-12-22 06:21:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:21:58,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:58,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:58,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:21:58,643 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash -131150408, now seen corresponding path program 2 times [2020-12-22 06:21:58,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:58,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97794661] [2020-12-22 06:21:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:58,706 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 06:21:58,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97794661] [2020-12-22 06:21:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:58,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:21:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287337437] [2020-12-22 06:21:58,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:21:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:21:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:21:58,709 INFO L87 Difference]: Start difference. First operand 38011 states and 68432 transitions. Second operand 3 states. [2020-12-22 06:22:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:00,309 INFO L93 Difference]: Finished difference Result 76011 states and 136844 transitions. [2020-12-22 06:22:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:00,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 06:22:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:00,393 INFO L225 Difference]: With dead ends: 76011 [2020-12-22 06:22:00,395 INFO L226 Difference]: Without dead ends: 38259 [2020-12-22 06:22:00,437 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 06:22:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38259 states. [2020-12-22 06:22:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38259 to 38011. [2020-12-22 06:22:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38011 states. [2020-12-22 06:22:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38011 states to 38011 states and 68304 transitions. [2020-12-22 06:22:02,174 INFO L78 Accepts]: Start accepts. Automaton has 38011 states and 68304 transitions. Word has length 89 [2020-12-22 06:22:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:02,174 INFO L481 AbstractCegarLoop]: Abstraction has 38011 states and 68304 transitions. [2020-12-22 06:22:02,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 38011 states and 68304 transitions. [2020-12-22 06:22:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:22:02,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:02,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:02,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:22:02,208 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 540374821, now seen corresponding path program 1 times [2020-12-22 06:22:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:02,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819476982] [2020-12-22 06:22:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:02,310 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 06:22:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819476982] [2020-12-22 06:22:02,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:02,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470354737] [2020-12-22 06:22:02,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:22:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:22:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:22:02,313 INFO L87 Difference]: Start difference. First operand 38011 states and 68304 transitions. Second operand 3 states. [2020-12-22 06:22:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:04,937 INFO L93 Difference]: Finished difference Result 105621 states and 189526 transitions. [2020-12-22 06:22:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:22:04,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 06:22:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:05,079 INFO L225 Difference]: With dead ends: 105621 [2020-12-22 06:22:05,079 INFO L226 Difference]: Without dead ends: 67829 [2020-12-22 06:22:05,290 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 06:22:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67829 states. [2020-12-22 06:22:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67829 to 67581. [2020-12-22 06:22:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67581 states. [2020-12-22 06:22:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67581 states to 67581 states and 120913 transitions. [2020-12-22 06:22:08,243 INFO L78 Accepts]: Start accepts. Automaton has 67581 states and 120913 transitions. Word has length 89 [2020-12-22 06:22:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:08,243 INFO L481 AbstractCegarLoop]: Abstraction has 67581 states and 120913 transitions. [2020-12-22 06:22:08,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:22:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 67581 states and 120913 transitions. [2020-12-22 06:22:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 06:22:08,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:08,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:08,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:22:08,260 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2042476290, now seen corresponding path program 1 times [2020-12-22 06:22:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:08,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857151683] [2020-12-22 06:22:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:08,376 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 06:22:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857151683] [2020-12-22 06:22:08,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:08,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:22:08,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596716888] [2020-12-22 06:22:08,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:22:08,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:22:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:22:08,378 INFO L87 Difference]: Start difference. First operand 67581 states and 120913 transitions. Second operand 9 states. [2020-12-22 06:22:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:14,799 INFO L93 Difference]: Finished difference Result 137062 states and 244916 transitions. [2020-12-22 06:22:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 06:22:14,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 06:22:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:15,199 INFO L225 Difference]: With dead ends: 137062 [2020-12-22 06:22:15,199 INFO L226 Difference]: Without dead ends: 136845 [2020-12-22 06:22:15,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:22:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136845 states. [2020-12-22 06:22:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136845 to 134888. [2020-12-22 06:22:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134888 states. [2020-12-22 06:22:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134888 states to 134888 states and 241374 transitions. [2020-12-22 06:22:21,357 INFO L78 Accepts]: Start accepts. Automaton has 134888 states and 241374 transitions. Word has length 90 [2020-12-22 06:22:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:21,358 INFO L481 AbstractCegarLoop]: Abstraction has 134888 states and 241374 transitions. [2020-12-22 06:22:21,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:22:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 134888 states and 241374 transitions. [2020-12-22 06:22:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:22:21,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:21,387 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:21,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:22:21,388 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2122098817, now seen corresponding path program 1 times [2020-12-22 06:22:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:21,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969285225] [2020-12-22 06:22:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:21,499 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 06:22:21,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969285225] [2020-12-22 06:22:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:22:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354947417] [2020-12-22 06:22:21,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:22:21,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:22:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:22:21,507 INFO L87 Difference]: Start difference. First operand 134888 states and 241374 transitions. Second operand 7 states. [2020-12-22 06:22:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:26,339 INFO L93 Difference]: Finished difference Result 135406 states and 242219 transitions. [2020-12-22 06:22:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:22:26,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-12-22 06:22:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:26,575 INFO L225 Difference]: With dead ends: 135406 [2020-12-22 06:22:26,576 INFO L226 Difference]: Without dead ends: 135061 [2020-12-22 06:22:26,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:22:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135061 states. [2020-12-22 06:22:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135061 to 134876. [2020-12-22 06:22:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134876 states. [2020-12-22 06:22:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134876 states to 134876 states and 241347 transitions. [2020-12-22 06:22:32,696 INFO L78 Accepts]: Start accepts. Automaton has 134876 states and 241347 transitions. Word has length 91 [2020-12-22 06:22:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:32,697 INFO L481 AbstractCegarLoop]: Abstraction has 134876 states and 241347 transitions. [2020-12-22 06:22:32,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:22:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 134876 states and 241347 transitions. [2020-12-22 06:22:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:22:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:32,732 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:22:32,732 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 961128793, now seen corresponding path program 1 times [2020-12-22 06:22:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425914593] [2020-12-22 06:22:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:32,814 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 06:22:32,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425914593] [2020-12-22 06:22:32,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:32,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:22:32,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918217865] [2020-12-22 06:22:32,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:22:32,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:22:32,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:22:32,816 INFO L87 Difference]: Start difference. First operand 134876 states and 241347 transitions. Second operand 4 states. [2020-12-22 06:22:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:39,890 INFO L93 Difference]: Finished difference Result 203337 states and 363693 transitions. [2020-12-22 06:22:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:22:39,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-12-22 06:22:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:40,277 INFO L225 Difference]: With dead ends: 203337 [2020-12-22 06:22:40,278 INFO L226 Difference]: Without dead ends: 203004 [2020-12-22 06:22:40,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:22:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203004 states. [2020-12-22 06:22:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203004 to 202379. [2020-12-22 06:22:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202379 states. [2020-12-22 06:22:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202379 states to 202379 states and 362128 transitions. [2020-12-22 06:22:49,839 INFO L78 Accepts]: Start accepts. Automaton has 202379 states and 362128 transitions. Word has length 91 [2020-12-22 06:22:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:22:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 202379 states and 362128 transitions. [2020-12-22 06:22:49,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:22:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 202379 states and 362128 transitions. [2020-12-22 06:22:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 06:22:49,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:22:49,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:22:49,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:22:49,905 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:22:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:22:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash 983761047, now seen corresponding path program 1 times [2020-12-22 06:22:49,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:22:49,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915875322] [2020-12-22 06:22:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:22:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:22:50,027 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 06:22:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915875322] [2020-12-22 06:22:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:22:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:22:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305229046] [2020-12-22 06:22:50,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:22:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:22:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:22:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:22:50,029 INFO L87 Difference]: Start difference. First operand 202379 states and 362128 transitions. Second operand 9 states. [2020-12-22 06:22:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:22:58,229 INFO L93 Difference]: Finished difference Result 205830 states and 367784 transitions. [2020-12-22 06:22:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:22:58,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 06:22:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:22:58,768 INFO L225 Difference]: With dead ends: 205830 [2020-12-22 06:22:58,768 INFO L226 Difference]: Without dead ends: 205283 [2020-12-22 06:22:58,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-12-22 06:22:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205283 states. [2020-12-22 06:23:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205283 to 202481. [2020-12-22 06:23:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202481 states. [2020-12-22 06:23:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202481 states to 202481 states and 362289 transitions. [2020-12-22 06:23:08,610 INFO L78 Accepts]: Start accepts. Automaton has 202481 states and 362289 transitions. Word has length 91 [2020-12-22 06:23:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:23:08,610 INFO L481 AbstractCegarLoop]: Abstraction has 202481 states and 362289 transitions. [2020-12-22 06:23:08,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:23:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 202481 states and 362289 transitions. [2020-12-22 06:23:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:23:08,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:23:08,659 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:23:08,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:23:08,659 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:23:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:23:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1096408318, now seen corresponding path program 1 times [2020-12-22 06:23:08,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:23:08,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442606287] [2020-12-22 06:23:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:23:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:23:08,755 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 06:23:08,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442606287] [2020-12-22 06:23:08,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:23:08,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:23:08,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380017960] [2020-12-22 06:23:08,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:23:08,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:23:08,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:23:08,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:23:08,757 INFO L87 Difference]: Start difference. First operand 202481 states and 362289 transitions. Second operand 5 states. [2020-12-22 06:23:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:23:16,600 INFO L93 Difference]: Finished difference Result 206009 states and 368077 transitions. [2020-12-22 06:23:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:23:16,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-12-22 06:23:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:23:17,151 INFO L225 Difference]: With dead ends: 206009 [2020-12-22 06:23:17,152 INFO L226 Difference]: Without dead ends: 205464 [2020-12-22 06:23:17,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:23:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205464 states. [2020-12-22 06:23:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205464 to 203218. [2020-12-22 06:23:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203218 states. [2020-12-22 06:23:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203218 states to 203218 states and 363481 transitions. [2020-12-22 06:23:28,283 INFO L78 Accepts]: Start accepts. Automaton has 203218 states and 363481 transitions. Word has length 92 [2020-12-22 06:23:28,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:23:28,283 INFO L481 AbstractCegarLoop]: Abstraction has 203218 states and 363481 transitions. [2020-12-22 06:23:28,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:23:28,283 INFO L276 IsEmpty]: Start isEmpty. Operand 203218 states and 363481 transitions. [2020-12-22 06:23:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:23:28,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:23:28,325 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:23:28,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:23:28,326 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:23:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:23:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash 462576803, now seen corresponding path program 1 times [2020-12-22 06:23:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:23:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56966986] [2020-12-22 06:23:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:23:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:23:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:23:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56966986] [2020-12-22 06:23:28,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:23:28,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:23:28,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101261637] [2020-12-22 06:23:28,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:23:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:23:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:23:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:23:28,812 INFO L87 Difference]: Start difference. First operand 203218 states and 363481 transitions. Second operand 10 states. [2020-12-22 06:23:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:23:36,456 INFO L93 Difference]: Finished difference Result 205235 states and 366741 transitions. [2020-12-22 06:23:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 06:23:36,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2020-12-22 06:23:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:23:36,844 INFO L225 Difference]: With dead ends: 205235 [2020-12-22 06:23:36,844 INFO L226 Difference]: Without dead ends: 203945 [2020-12-22 06:23:36,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-22 06:23:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203945 states. [2020-12-22 06:23:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203945 to 203186. [2020-12-22 06:23:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203186 states. [2020-12-22 06:23:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203186 states to 203186 states and 363413 transitions. [2020-12-22 06:23:46,514 INFO L78 Accepts]: Start accepts. Automaton has 203186 states and 363413 transitions. Word has length 94 [2020-12-22 06:23:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:23:46,514 INFO L481 AbstractCegarLoop]: Abstraction has 203186 states and 363413 transitions. [2020-12-22 06:23:46,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:23:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 203186 states and 363413 transitions. [2020-12-22 06:23:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:23:46,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:23:46,558 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:23:46,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:23:46,558 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:23:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:23:46,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1537405240, now seen corresponding path program 1 times [2020-12-22 06:23:46,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:23:46,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486849850] [2020-12-22 06:23:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:23:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:23:46,733 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 06:23:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486849850] [2020-12-22 06:23:46,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:23:46,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 06:23:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676574858] [2020-12-22 06:23:46,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 06:23:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:23:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 06:23:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 06:23:46,735 INFO L87 Difference]: Start difference. First operand 203186 states and 363413 transitions. Second operand 12 states. [2020-12-22 06:23:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:23:56,529 INFO L93 Difference]: Finished difference Result 211164 states and 376497 transitions. [2020-12-22 06:23:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 06:23:56,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2020-12-22 06:23:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:23:57,086 INFO L225 Difference]: With dead ends: 211164 [2020-12-22 06:23:57,086 INFO L226 Difference]: Without dead ends: 210338 [2020-12-22 06:23:57,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=675, Invalid=2081, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 06:23:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210338 states. [2020-12-22 06:24:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210338 to 203846. [2020-12-22 06:24:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203846 states. [2020-12-22 06:24:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203846 states to 203846 states and 364495 transitions. [2020-12-22 06:24:06,885 INFO L78 Accepts]: Start accepts. Automaton has 203846 states and 364495 transitions. Word has length 94 [2020-12-22 06:24:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:24:06,885 INFO L481 AbstractCegarLoop]: Abstraction has 203846 states and 364495 transitions. [2020-12-22 06:24:06,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 06:24:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 203846 states and 364495 transitions. [2020-12-22 06:24:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 06:24:06,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:24:06,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:24:06,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:24:06,925 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:24:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:24:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1457337874, now seen corresponding path program 1 times [2020-12-22 06:24:06,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:24:06,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768318041] [2020-12-22 06:24:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:24:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:24:07,029 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 06:24:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768318041] [2020-12-22 06:24:07,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:24:07,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:24:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812222991] [2020-12-22 06:24:07,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:24:07,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:24:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:24:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:24:07,031 INFO L87 Difference]: Start difference. First operand 203846 states and 364495 transitions. Second operand 8 states. [2020-12-22 06:24:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:24:15,014 INFO L93 Difference]: Finished difference Result 206118 states and 368204 transitions. [2020-12-22 06:24:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 06:24:15,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 06:24:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:24:15,565 INFO L225 Difference]: With dead ends: 206118 [2020-12-22 06:24:15,565 INFO L226 Difference]: Without dead ends: 204000 [2020-12-22 06:24:15,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:24:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204000 states. [2020-12-22 06:24:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204000 to 203356. [2020-12-22 06:24:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203356 states. [2020-12-22 06:24:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203356 states to 203356 states and 363675 transitions. [2020-12-22 06:24:26,165 INFO L78 Accepts]: Start accepts. Automaton has 203356 states and 363675 transitions. Word has length 94 [2020-12-22 06:24:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:24:26,165 INFO L481 AbstractCegarLoop]: Abstraction has 203356 states and 363675 transitions. [2020-12-22 06:24:26,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:24:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 203356 states and 363675 transitions. [2020-12-22 06:24:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:24:26,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:24:26,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:24:26,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 06:24:26,621 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:24:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:24:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1588925066, now seen corresponding path program 1 times [2020-12-22 06:24:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:24:26,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953003098] [2020-12-22 06:24:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:24:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:24:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 06:24:26,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953003098] [2020-12-22 06:24:26,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477610105] [2020-12-22 06:24:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:24:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:24:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 06:24:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:24:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:24:27,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:24:27,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 06:24:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336477782] [2020-12-22 06:24:27,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:24:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:24:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:24:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:24:27,399 INFO L87 Difference]: Start difference. First operand 203356 states and 363675 transitions. Second operand 9 states. [2020-12-22 06:24:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:24:39,130 INFO L93 Difference]: Finished difference Result 226581 states and 402140 transitions. [2020-12-22 06:24:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 06:24:39,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-12-22 06:24:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:24:39,733 INFO L225 Difference]: With dead ends: 226581 [2020-12-22 06:24:39,733 INFO L226 Difference]: Without dead ends: 224839 [2020-12-22 06:24:39,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 06:24:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224839 states. [2020-12-22 06:24:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224839 to 208113. [2020-12-22 06:24:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208113 states. [2020-12-22 06:24:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208113 states to 208113 states and 371998 transitions. [2020-12-22 06:24:49,648 INFO L78 Accepts]: Start accepts. Automaton has 208113 states and 371998 transitions. Word has length 95 [2020-12-22 06:24:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:24:49,648 INFO L481 AbstractCegarLoop]: Abstraction has 208113 states and 371998 transitions. [2020-12-22 06:24:49,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:24:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 208113 states and 371998 transitions. [2020-12-22 06:24:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:24:50,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:24:50,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:24:50,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 06:24:50,310 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:24:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:24:50,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1417193265, now seen corresponding path program 1 times [2020-12-22 06:24:50,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:24:50,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427798508] [2020-12-22 06:24:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:24:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:24:50,387 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 06:24:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427798508] [2020-12-22 06:24:50,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:24:50,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:24:50,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448881780] [2020-12-22 06:24:50,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:24:50,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:24:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:24:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:24:50,389 INFO L87 Difference]: Start difference. First operand 208113 states and 371998 transitions. Second operand 3 states.