/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-pthread/cs_lamport.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:14:32,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:14:32,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:14:32,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:14:32,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:14:32,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:14:32,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:14:32,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:14:32,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:14:32,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:14:32,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:14:32,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:14:32,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:14:32,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:14:32,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:14:32,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:14:32,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:14:32,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:14:32,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:14:32,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:14:32,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:14:32,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:14:32,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:14:32,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:14:32,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:14:32,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:14:32,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:14:32,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:14:32,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:14:32,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:14:32,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:14:32,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:14:32,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:14:32,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:14:32,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:14:32,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:14:32,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:14:32,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:14:32,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:14:32,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:14:32,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:14:32,538 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:14:32,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:14:32,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:14:32,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:14:32,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:14:32,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:14:32,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:14:32,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:14:32,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:14:32,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:14:32,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:14:32,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:14:32,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:14:32,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:14:32,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:14:32,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:14:32,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:14:32,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:14:32,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:14:32,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:14:32,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:14:32,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:14:32,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:14:32,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:14:32,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:14:32,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:14:32,937 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:14:32,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_lamport.i [2020-12-22 09:14:33,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76589334/4d42b90763c74d009df1e946273e20c4/FLAG5ef3836a6 [2020-12-22 09:14:33,795 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:14:33,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_lamport.i [2020-12-22 09:14:33,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76589334/4d42b90763c74d009df1e946273e20c4/FLAG5ef3836a6 [2020-12-22 09:14:34,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76589334/4d42b90763c74d009df1e946273e20c4 [2020-12-22 09:14:34,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:14:34,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:14:34,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:14:34,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:14:34,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:14:34,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:14:34" (1/1) ... [2020-12-22 09:14:34,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c4a266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:34, skipping insertion in model container [2020-12-22 09:14:34,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:14:34" (1/1) ... [2020-12-22 09:14:34,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:14:34,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:14:34,597 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_lamport.i[23604,23617] [2020-12-22 09:14:34,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:14:34,731 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:14:34,789 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_lamport.i[23604,23617] [2020-12-22 09:14:34,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:14:35,040 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:14:35,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35 WrapperNode [2020-12-22 09:14:35,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:14:35,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:14:35,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:14:35,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:14:35,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:14:35,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:14:35,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:14:35,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:14:35,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... [2020-12-22 09:14:35,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:14:35,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:14:35,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:14:35,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:14:35,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:14:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 09:14:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 09:14:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 09:14:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:14:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 09:14:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 09:14:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 09:14:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:14:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:14:35,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:14:39,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:14:39,594 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2020-12-22 09:14:39,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:14:39 BoogieIcfgContainer [2020-12-22 09:14:39,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:14:39,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:14:39,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:14:39,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:14:39,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:14:34" (1/3) ... [2020-12-22 09:14:39,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b14d1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:14:39, skipping insertion in model container [2020-12-22 09:14:39,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:14:35" (2/3) ... [2020-12-22 09:14:39,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b14d1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:14:39, skipping insertion in model container [2020-12-22 09:14:39,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:14:39" (3/3) ... [2020-12-22 09:14:39,604 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_lamport.i [2020-12-22 09:14:39,610 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:14:39,615 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:14:39,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:14:39,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:14:39,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:14:39,661 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:14:39,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:14:39,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:14:39,662 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:14:39,662 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:14:39,662 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:14:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states. [2020-12-22 09:14:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:14:39,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:39,692 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] [2020-12-22 09:14:39,693 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1960876399, now seen corresponding path program 1 times [2020-12-22 09:14:39,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:39,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809232120] [2020-12-22 09:14:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:14:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809232120] [2020-12-22 09:14:40,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:14:40,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:14:40,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510232459] [2020-12-22 09:14:40,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:14:40,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:14:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:40,183 INFO L87 Difference]: Start difference. First operand 202 states. Second operand 3 states. [2020-12-22 09:14:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:40,283 INFO L93 Difference]: Finished difference Result 406 states and 636 transitions. [2020-12-22 09:14:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:14:40,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:14:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:40,299 INFO L225 Difference]: With dead ends: 406 [2020-12-22 09:14:40,299 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 09:14:40,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 09:14:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-12-22 09:14:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 09:14:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 266 transitions. [2020-12-22 09:14:40,355 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 266 transitions. Word has length 56 [2020-12-22 09:14:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:40,356 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 266 transitions. [2020-12-22 09:14:40,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:14:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 266 transitions. [2020-12-22 09:14:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 09:14:40,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:40,363 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] [2020-12-22 09:14:40,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:14:40,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:40,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:40,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1377074985, now seen corresponding path program 1 times [2020-12-22 09:14:40,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:40,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878318587] [2020-12-22 09:14:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:14:40,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878318587] [2020-12-22 09:14:40,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:14:40,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:14:40,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825502276] [2020-12-22 09:14:40,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:14:40,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:14:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:40,511 INFO L87 Difference]: Start difference. First operand 199 states and 266 transitions. Second operand 3 states. [2020-12-22 09:14:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:40,568 INFO L93 Difference]: Finished difference Result 397 states and 532 transitions. [2020-12-22 09:14:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:14:40,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 09:14:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:40,573 INFO L225 Difference]: With dead ends: 397 [2020-12-22 09:14:40,573 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 09:14:40,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 09:14:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-12-22 09:14:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 09:14:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 267 transitions. [2020-12-22 09:14:40,603 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 267 transitions. Word has length 59 [2020-12-22 09:14:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:40,603 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 267 transitions. [2020-12-22 09:14:40,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:14:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 267 transitions. [2020-12-22 09:14:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:14:40,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:40,612 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] [2020-12-22 09:14:40,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:14:40,612 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 903972697, now seen corresponding path program 1 times [2020-12-22 09:14:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:40,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951792698] [2020-12-22 09:14:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:14:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951792698] [2020-12-22 09:14:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601068820] [2020-12-22 09:14:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:14:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:14:41,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:14:41,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 09:14:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332840593] [2020-12-22 09:14:41,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:14:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:14:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:14:41,164 INFO L87 Difference]: Start difference. First operand 200 states and 267 transitions. Second operand 5 states. [2020-12-22 09:14:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:41,216 INFO L93 Difference]: Finished difference Result 400 states and 535 transitions. [2020-12-22 09:14:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:14:41,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-12-22 09:14:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:41,225 INFO L225 Difference]: With dead ends: 400 [2020-12-22 09:14:41,225 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 09:14:41,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 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 09:14:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 09:14:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-12-22 09:14:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 09:14:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 269 transitions. [2020-12-22 09:14:41,254 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 269 transitions. Word has length 61 [2020-12-22 09:14:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:41,254 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 269 transitions. [2020-12-22 09:14:41,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:14:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 269 transitions. [2020-12-22 09:14:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:14:41,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:41,260 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:41,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 09:14:41,476 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1737493157, now seen corresponding path program 2 times [2020-12-22 09:14:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:41,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820779674] [2020-12-22 09:14:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:14:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820779674] [2020-12-22 09:14:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313337515] [2020-12-22 09:14:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:42,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:14:42,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:14:42,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 09:14:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:14:42,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:14:42,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 09:14:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772194722] [2020-12-22 09:14:42,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:14:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:14:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:14:42,332 INFO L87 Difference]: Start difference. First operand 202 states and 269 transitions. Second operand 4 states. [2020-12-22 09:14:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:42,393 INFO L93 Difference]: Finished difference Result 367 states and 486 transitions. [2020-12-22 09:14:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:14:42,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:14:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:42,396 INFO L225 Difference]: With dead ends: 367 [2020-12-22 09:14:42,396 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 09:14:42,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:14:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 09:14:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2020-12-22 09:14:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 09:14:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 418 transitions. [2020-12-22 09:14:42,407 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 418 transitions. Word has length 63 [2020-12-22 09:14:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:42,407 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 418 transitions. [2020-12-22 09:14:42,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:14:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 418 transitions. [2020-12-22 09:14:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 09:14:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:42,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:42,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:42,625 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:42,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1308430535, now seen corresponding path program 1 times [2020-12-22 09:14:42,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:42,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047264457] [2020-12-22 09:14:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:14:42,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047264457] [2020-12-22 09:14:42,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980436365] [2020-12-22 09:14:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:14:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:14:43,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:14:43,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 09:14:43,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308847524] [2020-12-22 09:14:43,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:14:43,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:14:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:14:43,200 INFO L87 Difference]: Start difference. First operand 308 states and 418 transitions. Second operand 3 states. [2020-12-22 09:14:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:45,376 INFO L93 Difference]: Finished difference Result 881 states and 1196 transitions. [2020-12-22 09:14:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:14:45,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 09:14:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:45,381 INFO L225 Difference]: With dead ends: 881 [2020-12-22 09:14:45,381 INFO L226 Difference]: Without dead ends: 598 [2020-12-22 09:14:45,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:14:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-22 09:14:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 495. [2020-12-22 09:14:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-22 09:14:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 678 transitions. [2020-12-22 09:14:45,400 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 678 transitions. Word has length 92 [2020-12-22 09:14:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:45,400 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 678 transitions. [2020-12-22 09:14:45,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:14:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 678 transitions. [2020-12-22 09:14:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 09:14:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:45,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:45,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:45,617 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:45,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1254037637, now seen corresponding path program 1 times [2020-12-22 09:14:45,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:45,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262137605] [2020-12-22 09:14:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:14:45,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262137605] [2020-12-22 09:14:45,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873969932] [2020-12-22 09:14:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:14:46,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:14:46,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:14:46,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 09:14:46,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453401220] [2020-12-22 09:14:46,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:14:46,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:46,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:14:46,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:14:46,129 INFO L87 Difference]: Start difference. First operand 495 states and 678 transitions. Second operand 7 states. [2020-12-22 09:14:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:46,344 INFO L93 Difference]: Finished difference Result 1006 states and 1378 transitions. [2020-12-22 09:14:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:14:46,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-12-22 09:14:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:46,350 INFO L225 Difference]: With dead ends: 1006 [2020-12-22 09:14:46,352 INFO L226 Difference]: Without dead ends: 514 [2020-12-22 09:14:46,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:14:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-12-22 09:14:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 506. [2020-12-22 09:14:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-12-22 09:14:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 690 transitions. [2020-12-22 09:14:46,388 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 690 transitions. Word has length 92 [2020-12-22 09:14:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:46,388 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 690 transitions. [2020-12-22 09:14:46,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:14:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 690 transitions. [2020-12-22 09:14:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:14:46,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:46,394 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:46,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:46,610 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 478362091, now seen corresponding path program 2 times [2020-12-22 09:14:46,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:46,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912452133] [2020-12-22 09:14:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:14:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912452133] [2020-12-22 09:14:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877790489] [2020-12-22 09:14:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:47,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:14:47,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:14:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 09:14:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:14:47,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:14:47,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 09:14:47,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190617449] [2020-12-22 09:14:47,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:14:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:14:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:14:47,307 INFO L87 Difference]: Start difference. First operand 506 states and 690 transitions. Second operand 3 states. [2020-12-22 09:14:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:47,337 INFO L93 Difference]: Finished difference Result 799 states and 1080 transitions. [2020-12-22 09:14:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:14:47,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-12-22 09:14:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:47,341 INFO L225 Difference]: With dead ends: 799 [2020-12-22 09:14:47,341 INFO L226 Difference]: Without dead ends: 506 [2020-12-22 09:14:47,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:14:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-12-22 09:14:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2020-12-22 09:14:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-12-22 09:14:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 689 transitions. [2020-12-22 09:14:47,363 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 689 transitions. Word has length 103 [2020-12-22 09:14:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:47,363 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 689 transitions. [2020-12-22 09:14:47,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:14:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 689 transitions. [2020-12-22 09:14:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:14:47,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:47,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:47,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 09:14:47,582 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1405889393, now seen corresponding path program 1 times [2020-12-22 09:14:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:47,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884413376] [2020-12-22 09:14:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:14:47,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884413376] [2020-12-22 09:14:47,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457494059] [2020-12-22 09:14:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:14:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:14:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:14:48,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:14:48,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 09:14:48,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173245271] [2020-12-22 09:14:48,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:14:48,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:48,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:14:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:14:48,220 INFO L87 Difference]: Start difference. First operand 506 states and 689 transitions. Second operand 6 states. [2020-12-22 09:14:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:48,410 INFO L93 Difference]: Finished difference Result 1000 states and 1365 transitions. [2020-12-22 09:14:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:14:48,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-12-22 09:14:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:48,415 INFO L225 Difference]: With dead ends: 1000 [2020-12-22 09:14:48,415 INFO L226 Difference]: Without dead ends: 515 [2020-12-22 09:14:48,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:14:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-12-22 09:14:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2020-12-22 09:14:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-22 09:14:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 699 transitions. [2020-12-22 09:14:48,440 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 699 transitions. Word has length 103 [2020-12-22 09:14:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:48,441 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 699 transitions. [2020-12-22 09:14:48,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:14:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 699 transitions. [2020-12-22 09:14:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:14:48,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:48,443 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:48,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:14:48,657 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:48,659 INFO L82 PathProgramCache]: Analyzing trace with hash 887018239, now seen corresponding path program 2 times [2020-12-22 09:14:48,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:48,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447132545] [2020-12-22 09:14:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:14:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447132545] [2020-12-22 09:14:48,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:14:48,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:14:48,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995407083] [2020-12-22 09:14:48,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:14:48,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:14:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:48,934 INFO L87 Difference]: Start difference. First operand 515 states and 699 transitions. Second operand 3 states. [2020-12-22 09:14:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:49,095 INFO L93 Difference]: Finished difference Result 820 states and 1105 transitions. [2020-12-22 09:14:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:14:49,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 09:14:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:49,099 INFO L225 Difference]: With dead ends: 820 [2020-12-22 09:14:49,099 INFO L226 Difference]: Without dead ends: 530 [2020-12-22 09:14:49,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:14:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-12-22 09:14:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2020-12-22 09:14:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-12-22 09:14:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 717 transitions. [2020-12-22 09:14:49,121 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 717 transitions. Word has length 112 [2020-12-22 09:14:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 530 states and 717 transitions. [2020-12-22 09:14:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:14:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 717 transitions. [2020-12-22 09:14:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:14:49,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:49,123 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:49,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:14:49,124 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1673844607, now seen corresponding path program 1 times [2020-12-22 09:14:49,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:49,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792958709] [2020-12-22 09:14:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:14:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792958709] [2020-12-22 09:14:49,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:14:49,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:14:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009547603] [2020-12-22 09:14:49,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:14:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:14:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:14:49,350 INFO L87 Difference]: Start difference. First operand 530 states and 717 transitions. Second operand 4 states. [2020-12-22 09:14:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:14:49,714 INFO L93 Difference]: Finished difference Result 779 states and 1042 transitions. [2020-12-22 09:14:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:14:49,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-12-22 09:14:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:14:49,721 INFO L225 Difference]: With dead ends: 779 [2020-12-22 09:14:49,721 INFO L226 Difference]: Without dead ends: 496 [2020-12-22 09:14:49,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:14:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-12-22 09:14:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2020-12-22 09:14:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-12-22 09:14:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 661 transitions. [2020-12-22 09:14:49,749 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 661 transitions. Word has length 112 [2020-12-22 09:14:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:14:49,749 INFO L481 AbstractCegarLoop]: Abstraction has 496 states and 661 transitions. [2020-12-22 09:14:49,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:14:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 661 transitions. [2020-12-22 09:14:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:14:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:14:49,754 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:14:49,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:14:49,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:14:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:14:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash -719904449, now seen corresponding path program 1 times [2020-12-22 09:14:49,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:14:49,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89506034] [2020-12-22 09:14:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:14:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:14:54,617 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:14:55,011 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-22 09:14:55,414 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 09:14:55,815 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-12-22 09:14:56,110 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-22 09:14:56,319 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-22 09:14:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:14:56,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89506034] [2020-12-22 09:14:56,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:14:56,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 09:14:56,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959437409] [2020-12-22 09:14:56,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:14:56,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:14:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:14:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:14:56,729 INFO L87 Difference]: Start difference. First operand 496 states and 661 transitions. Second operand 15 states. [2020-12-22 09:14:59,456 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 09:14:59,727 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-12-22 09:14:59,935 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-22 09:15:00,250 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-22 09:15:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:04,572 INFO L93 Difference]: Finished difference Result 1100 states and 1461 transitions. [2020-12-22 09:15:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 09:15:04,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-22 09:15:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:04,579 INFO L225 Difference]: With dead ends: 1100 [2020-12-22 09:15:04,579 INFO L226 Difference]: Without dead ends: 880 [2020-12-22 09:15:04,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:15:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2020-12-22 09:15:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 547. [2020-12-22 09:15:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-12-22 09:15:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 724 transitions. [2020-12-22 09:15:04,606 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 724 transitions. Word has length 112 [2020-12-22 09:15:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:04,607 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 724 transitions. [2020-12-22 09:15:04,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:15:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 724 transitions. [2020-12-22 09:15:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:15:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:04,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:04,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:15:04,610 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1687255103, now seen corresponding path program 1 times [2020-12-22 09:15:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307430632] [2020-12-22 09:15:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:07,357 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-12-22 09:15:07,667 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 09:15:07,912 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-12-22 09:15:08,095 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-12-22 09:15:08,394 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-12-22 09:15:08,632 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2020-12-22 09:15:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307430632] [2020-12-22 09:15:08,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:08,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:15:08,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121666947] [2020-12-22 09:15:08,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:15:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:15:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:15:08,947 INFO L87 Difference]: Start difference. First operand 547 states and 724 transitions. Second operand 11 states. [2020-12-22 09:15:09,256 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-12-22 09:15:11,992 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92 [2020-12-22 09:15:12,341 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 97 [2020-12-22 09:15:12,705 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 99 [2020-12-22 09:15:13,143 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2020-12-22 09:15:13,338 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-12-22 09:15:13,661 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-12-22 09:15:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:14,998 INFO L93 Difference]: Finished difference Result 976 states and 1280 transitions. [2020-12-22 09:15:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:15:14,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 112 [2020-12-22 09:15:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:15,003 INFO L225 Difference]: With dead ends: 976 [2020-12-22 09:15:15,003 INFO L226 Difference]: Without dead ends: 756 [2020-12-22 09:15:15,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:15:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-12-22 09:15:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 530. [2020-12-22 09:15:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-12-22 09:15:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 701 transitions. [2020-12-22 09:15:15,030 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 701 transitions. Word has length 112 [2020-12-22 09:15:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:15,030 INFO L481 AbstractCegarLoop]: Abstraction has 530 states and 701 transitions. [2020-12-22 09:15:15,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:15:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 701 transitions. [2020-12-22 09:15:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 09:15:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:15,032 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:15,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:15:15,033 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 377917729, now seen corresponding path program 1 times [2020-12-22 09:15:15,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:15,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468907965] [2020-12-22 09:15:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468907965] [2020-12-22 09:15:15,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:15,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:15:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584982256] [2020-12-22 09:15:15,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:15:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:15:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:15,145 INFO L87 Difference]: Start difference. First operand 530 states and 701 transitions. Second operand 3 states. [2020-12-22 09:15:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:15,247 INFO L93 Difference]: Finished difference Result 929 states and 1251 transitions. [2020-12-22 09:15:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:15:15,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 09:15:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:15,251 INFO L225 Difference]: With dead ends: 929 [2020-12-22 09:15:15,251 INFO L226 Difference]: Without dead ends: 544 [2020-12-22 09:15:15,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:15:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-12-22 09:15:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2020-12-22 09:15:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-12-22 09:15:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 714 transitions. [2020-12-22 09:15:15,276 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 714 transitions. Word has length 115 [2020-12-22 09:15:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:15,276 INFO L481 AbstractCegarLoop]: Abstraction has 544 states and 714 transitions. [2020-12-22 09:15:15,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:15:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 714 transitions. [2020-12-22 09:15:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 09:15:15,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:15,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:15,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:15:15,279 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash -39478877, now seen corresponding path program 1 times [2020-12-22 09:15:15,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:15,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944807850] [2020-12-22 09:15:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:19,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944807850] [2020-12-22 09:15:19,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:19,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:15:19,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704358685] [2020-12-22 09:15:19,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:15:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:19,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:15:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:19,323 INFO L87 Difference]: Start difference. First operand 544 states and 714 transitions. Second operand 5 states. [2020-12-22 09:15:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:20,030 INFO L93 Difference]: Finished difference Result 1256 states and 1639 transitions. [2020-12-22 09:15:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:15:20,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 09:15:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:20,034 INFO L225 Difference]: With dead ends: 1256 [2020-12-22 09:15:20,035 INFO L226 Difference]: Without dead ends: 764 [2020-12-22 09:15:20,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-12-22 09:15:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 576. [2020-12-22 09:15:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-12-22 09:15:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 730 transitions. [2020-12-22 09:15:20,068 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 730 transitions. Word has length 115 [2020-12-22 09:15:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:20,068 INFO L481 AbstractCegarLoop]: Abstraction has 576 states and 730 transitions. [2020-12-22 09:15:20,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:15:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 730 transitions. [2020-12-22 09:15:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 09:15:20,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:20,071 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:20,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:15:20,072 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:20,072 INFO L82 PathProgramCache]: Analyzing trace with hash -210094109, now seen corresponding path program 1 times [2020-12-22 09:15:20,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:20,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281589099] [2020-12-22 09:15:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:27,122 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-22 09:15:27,301 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-12-22 09:15:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:27,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281589099] [2020-12-22 09:15:27,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:27,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:15:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664605027] [2020-12-22 09:15:27,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:15:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:15:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:15:27,501 INFO L87 Difference]: Start difference. First operand 576 states and 730 transitions. Second operand 11 states. [2020-12-22 09:15:30,085 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-12-22 09:15:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:31,315 INFO L93 Difference]: Finished difference Result 926 states and 1152 transitions. [2020-12-22 09:15:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:15:31,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 115 [2020-12-22 09:15:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:31,321 INFO L225 Difference]: With dead ends: 926 [2020-12-22 09:15:31,321 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 09:15:31,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:15:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 09:15:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 576. [2020-12-22 09:15:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-12-22 09:15:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 727 transitions. [2020-12-22 09:15:31,351 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 727 transitions. Word has length 115 [2020-12-22 09:15:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:31,351 INFO L481 AbstractCegarLoop]: Abstraction has 576 states and 727 transitions. [2020-12-22 09:15:31,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:15:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 727 transitions. [2020-12-22 09:15:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:15:31,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:31,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:31,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:15:31,354 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 483421956, now seen corresponding path program 1 times [2020-12-22 09:15:31,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:31,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773072517] [2020-12-22 09:15:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:34,433 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-12-22 09:15:34,887 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:15:35,142 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-12-22 09:15:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773072517] [2020-12-22 09:15:35,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:35,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:15:35,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879646598] [2020-12-22 09:15:35,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:15:35,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:15:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:15:35,284 INFO L87 Difference]: Start difference. First operand 576 states and 727 transitions. Second operand 6 states. [2020-12-22 09:15:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:38,322 INFO L93 Difference]: Finished difference Result 673 states and 837 transitions. [2020-12-22 09:15:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:15:38,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2020-12-22 09:15:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:38,327 INFO L225 Difference]: With dead ends: 673 [2020-12-22 09:15:38,327 INFO L226 Difference]: Without dead ends: 556 [2020-12-22 09:15:38,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:15:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-12-22 09:15:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2020-12-22 09:15:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-12-22 09:15:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 703 transitions. [2020-12-22 09:15:38,355 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 703 transitions. Word has length 120 [2020-12-22 09:15:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:38,356 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 703 transitions. [2020-12-22 09:15:38,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:15:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 703 transitions. [2020-12-22 09:15:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:15:38,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:38,358 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:38,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:15:38,358 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1156181625, now seen corresponding path program 1 times [2020-12-22 09:15:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:38,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145403038] [2020-12-22 09:15:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:41,876 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:15:42,135 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-12-22 09:15:42,958 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-12-22 09:15:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:43,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145403038] [2020-12-22 09:15:43,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:43,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:15:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413697766] [2020-12-22 09:15:43,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:15:43,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:15:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:15:43,118 INFO L87 Difference]: Start difference. First operand 556 states and 703 transitions. Second operand 5 states. [2020-12-22 09:15:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:45,906 INFO L93 Difference]: Finished difference Result 794 states and 996 transitions. [2020-12-22 09:15:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:15:45,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-12-22 09:15:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:45,910 INFO L225 Difference]: With dead ends: 794 [2020-12-22 09:15:45,910 INFO L226 Difference]: Without dead ends: 534 [2020-12-22 09:15:45,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 16 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:15:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-22 09:15:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2020-12-22 09:15:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-12-22 09:15:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 676 transitions. [2020-12-22 09:15:45,937 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 676 transitions. Word has length 120 [2020-12-22 09:15:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:45,938 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 676 transitions. [2020-12-22 09:15:45,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:15:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 676 transitions. [2020-12-22 09:15:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 09:15:45,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:45,940 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:45,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:15:45,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash 882640438, now seen corresponding path program 1 times [2020-12-22 09:15:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:45,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477271574] [2020-12-22 09:15:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:50,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477271574] [2020-12-22 09:15:50,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:50,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:15:50,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822956232] [2020-12-22 09:15:50,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:15:50,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:15:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:15:50,349 INFO L87 Difference]: Start difference. First operand 534 states and 676 transitions. Second operand 10 states. [2020-12-22 09:15:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:15:53,760 INFO L93 Difference]: Finished difference Result 657 states and 805 transitions. [2020-12-22 09:15:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:15:53,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-12-22 09:15:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:15:53,763 INFO L225 Difference]: With dead ends: 657 [2020-12-22 09:15:53,763 INFO L226 Difference]: Without dead ends: 609 [2020-12-22 09:15:53,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:15:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-12-22 09:15:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 539. [2020-12-22 09:15:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-22 09:15:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 682 transitions. [2020-12-22 09:15:53,793 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 682 transitions. Word has length 123 [2020-12-22 09:15:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:15:53,793 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 682 transitions. [2020-12-22 09:15:53,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:15:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 682 transitions. [2020-12-22 09:15:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:15:53,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:15:53,796 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:15:53,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:15:53,796 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:15:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:15:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1882264179, now seen corresponding path program 1 times [2020-12-22 09:15:53,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:15:53,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019622233] [2020-12-22 09:15:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:15:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:15:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:15:54,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019622233] [2020-12-22 09:15:54,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:15:54,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:15:54,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021410935] [2020-12-22 09:15:54,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:15:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:15:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:15:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:15:54,300 INFO L87 Difference]: Start difference. First operand 539 states and 682 transitions. Second operand 10 states. [2020-12-22 09:16:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:01,580 INFO L93 Difference]: Finished difference Result 1028 states and 1285 transitions. [2020-12-22 09:16:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:16:01,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 127 [2020-12-22 09:16:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:01,585 INFO L225 Difference]: With dead ends: 1028 [2020-12-22 09:16:01,585 INFO L226 Difference]: Without dead ends: 767 [2020-12-22 09:16:01,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:16:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-12-22 09:16:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2020-12-22 09:16:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-12-22 09:16:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 714 transitions. [2020-12-22 09:16:01,615 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 714 transitions. Word has length 127 [2020-12-22 09:16:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:01,616 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 714 transitions. [2020-12-22 09:16:01,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:16:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 714 transitions. [2020-12-22 09:16:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:16:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:01,618 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:16:01,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:16:01,618 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:01,619 INFO L82 PathProgramCache]: Analyzing trace with hash 51159306, now seen corresponding path program 1 times [2020-12-22 09:16:01,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:01,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758794747] [2020-12-22 09:16:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:06,170 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-22 09:16:06,375 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-22 09:16:06,576 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-12-22 09:16:06,780 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 09:16:07,011 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-12-22 09:16:07,257 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-12-22 09:16:07,471 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-22 09:16:07,725 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-22 09:16:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:08,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758794747] [2020-12-22 09:16:08,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:08,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:16:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111869604] [2020-12-22 09:16:08,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:16:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:16:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:16:08,033 INFO L87 Difference]: Start difference. First operand 567 states and 714 transitions. Second operand 12 states. [2020-12-22 09:16:10,487 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-12-22 09:16:10,727 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-12-22 09:16:11,363 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-12-22 09:16:12,108 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-12-22 09:16:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:13,710 INFO L93 Difference]: Finished difference Result 906 states and 1125 transitions. [2020-12-22 09:16:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:16:13,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-22 09:16:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:13,714 INFO L225 Difference]: With dead ends: 906 [2020-12-22 09:16:13,715 INFO L226 Difference]: Without dead ends: 858 [2020-12-22 09:16:13,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:16:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-12-22 09:16:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 633. [2020-12-22 09:16:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-12-22 09:16:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 807 transitions. [2020-12-22 09:16:13,758 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 807 transitions. Word has length 130 [2020-12-22 09:16:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:13,759 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 807 transitions. [2020-12-22 09:16:13,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:16:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 807 transitions. [2020-12-22 09:16:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:16:13,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:13,761 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:16:13,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:16:13,761 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1809309913, now seen corresponding path program 1 times [2020-12-22 09:16:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:13,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390162638] [2020-12-22 09:16:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:19,665 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:16:20,359 WARN L197 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 109 [2020-12-22 09:16:21,199 WARN L197 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 120 [2020-12-22 09:16:21,802 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 88 [2020-12-22 09:16:22,368 WARN L197 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 83 [2020-12-22 09:16:22,937 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 82 [2020-12-22 09:16:23,645 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 106 [2020-12-22 09:16:24,122 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 64 [2020-12-22 09:16:24,824 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 95 [2020-12-22 09:16:25,232 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 58 [2020-12-22 09:16:25,522 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 37 [2020-12-22 09:16:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:26,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390162638] [2020-12-22 09:16:26,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:26,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 09:16:26,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778956136] [2020-12-22 09:16:26,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 09:16:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 09:16:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:16:26,091 INFO L87 Difference]: Start difference. First operand 633 states and 807 transitions. Second operand 14 states. [2020-12-22 09:16:26,915 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-12-22 09:16:29,881 WARN L197 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2020-12-22 09:16:30,742 WARN L197 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 122 [2020-12-22 09:16:31,688 WARN L197 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 120 [2020-12-22 09:16:32,672 WARN L197 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 134 [2020-12-22 09:16:32,938 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-22 09:16:33,483 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2020-12-22 09:16:34,041 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2020-12-22 09:16:34,689 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-12-22 09:16:34,962 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-12-22 09:16:35,553 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-12-22 09:16:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:37,689 INFO L93 Difference]: Finished difference Result 842 states and 1027 transitions. [2020-12-22 09:16:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 09:16:37,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 130 [2020-12-22 09:16:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:37,693 INFO L225 Difference]: With dead ends: 842 [2020-12-22 09:16:37,693 INFO L226 Difference]: Without dead ends: 794 [2020-12-22 09:16:37,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-12-22 09:16:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-12-22 09:16:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 633. [2020-12-22 09:16:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-12-22 09:16:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 807 transitions. [2020-12-22 09:16:37,744 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 807 transitions. Word has length 130 [2020-12-22 09:16:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:37,744 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 807 transitions. [2020-12-22 09:16:37,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 09:16:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 807 transitions. [2020-12-22 09:16:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:16:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:37,746 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:16:37,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:16:37,746 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1924957605, now seen corresponding path program 1 times [2020-12-22 09:16:37,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:37,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346920539] [2020-12-22 09:16:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:40,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346920539] [2020-12-22 09:16:40,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:40,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:16:40,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543082229] [2020-12-22 09:16:40,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:16:40,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:16:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:16:40,276 INFO L87 Difference]: Start difference. First operand 633 states and 807 transitions. Second operand 5 states. [2020-12-22 09:16:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:44,517 INFO L93 Difference]: Finished difference Result 858 states and 1081 transitions. [2020-12-22 09:16:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:16:44,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-12-22 09:16:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:44,523 INFO L225 Difference]: With dead ends: 858 [2020-12-22 09:16:44,523 INFO L226 Difference]: Without dead ends: 500 [2020-12-22 09:16:44,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:16:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-12-22 09:16:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 476. [2020-12-22 09:16:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-12-22 09:16:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 593 transitions. [2020-12-22 09:16:44,565 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 593 transitions. Word has length 130 [2020-12-22 09:16:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:44,566 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 593 transitions. [2020-12-22 09:16:44,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:16:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 593 transitions. [2020-12-22 09:16:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:16:44,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:44,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:16:44,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:16:44,568 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1213724617, now seen corresponding path program 1 times [2020-12-22 09:16:44,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:44,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141288617] [2020-12-22 09:16:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:16:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:16:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:16:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141288617] [2020-12-22 09:16:53,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:16:53,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:16:53,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645401752] [2020-12-22 09:16:53,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:16:53,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:16:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:16:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:16:53,565 INFO L87 Difference]: Start difference. First operand 476 states and 593 transitions. Second operand 4 states. [2020-12-22 09:16:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:16:54,248 INFO L93 Difference]: Finished difference Result 921 states and 1133 transitions. [2020-12-22 09:16:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:16:54,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 09:16:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:16:54,252 INFO L225 Difference]: With dead ends: 921 [2020-12-22 09:16:54,252 INFO L226 Difference]: Without dead ends: 562 [2020-12-22 09:16:54,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:16:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-22 09:16:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 500. [2020-12-22 09:16:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-12-22 09:16:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 617 transitions. [2020-12-22 09:16:54,302 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 617 transitions. Word has length 131 [2020-12-22 09:16:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:16:54,302 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 617 transitions. [2020-12-22 09:16:54,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:16:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 617 transitions. [2020-12-22 09:16:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:16:54,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:16:54,304 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:16:54,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:16:54,304 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:16:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:16:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 245588611, now seen corresponding path program 1 times [2020-12-22 09:16:54,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:16:54,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227688180] [2020-12-22 09:16:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:29,304 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 85 [2020-12-22 09:17:30,451 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 253 DAG size of output: 120 [2020-12-22 09:17:31,864 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 278 DAG size of output: 143 [2020-12-22 09:17:33,470 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 320 DAG size of output: 166 [2020-12-22 09:17:35,077 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 312 DAG size of output: 163 [2020-12-22 09:17:36,680 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 311 DAG size of output: 159 [2020-12-22 09:17:38,464 WARN L197 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 317 DAG size of output: 169 [2020-12-22 09:17:40,773 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 380 DAG size of output: 205 [2020-12-22 09:17:43,363 WARN L197 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 409 DAG size of output: 215 [2020-12-22 09:17:45,863 WARN L197 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 403 DAG size of output: 211 [2020-12-22 09:17:48,103 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 357 DAG size of output: 202 [2020-12-22 09:17:50,633 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 362 DAG size of output: 204 [2020-12-22 09:17:51,965 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 308 DAG size of output: 143 [2020-12-22 09:17:53,849 WARN L197 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 334 DAG size of output: 165 [2020-12-22 09:17:55,660 WARN L197 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 325 DAG size of output: 154 [2020-12-22 09:17:57,411 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 324 DAG size of output: 147 [2020-12-22 09:18:00,000 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 384 DAG size of output: 161 [2020-12-22 09:18:02,407 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 378 DAG size of output: 164 [2020-12-22 09:18:04,698 WARN L197 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 387 DAG size of output: 166 [2020-12-22 09:18:06,258 WARN L197 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 291 DAG size of output: 145 [2020-12-22 09:18:07,713 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 269 DAG size of output: 129 [2020-12-22 09:18:09,027 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 254 DAG size of output: 125 [2020-12-22 09:18:10,066 WARN L197 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 118 [2020-12-22 09:18:11,050 WARN L197 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 115 [2020-12-22 09:18:12,023 WARN L197 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 110 [2020-12-22 09:18:12,989 WARN L197 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 107 [2020-12-22 09:18:13,555 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 55 [2020-12-22 09:18:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 09:18:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227688180] [2020-12-22 09:18:14,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:14,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 09:18:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175286452] [2020-12-22 09:18:14,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 09:18:14,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 09:18:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-12-22 09:18:14,092 INFO L87 Difference]: Start difference. First operand 500 states and 617 transitions. Second operand 29 states. [2020-12-22 09:18:15,531 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2020-12-22 09:18:18,946 WARN L197 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 157 [2020-12-22 09:18:19,785 WARN L197 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 154 [2020-12-22 09:18:20,627 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2020-12-22 09:18:21,994 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 164 DAG size of output: 152