/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/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:49:42,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:49:42,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:49:42,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:49:42,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:49:42,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:49:42,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:49:42,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:49:42,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:49:42,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:49:42,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:49:42,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:49:42,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:49:42,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:49:42,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:49:42,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:49:42,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:49:42,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:49:42,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:49:42,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:49:42,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:49:42,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:49:42,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:49:42,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:49:42,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:49:42,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:49:42,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:49:42,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:49:42,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:49:42,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:49:42,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:49:42,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:49:42,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:49:42,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:49:42,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:49:42,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:49:42,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:49:42,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:49:42,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:49:42,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:49:42,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:49:42,505 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:49:42,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:49:42,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:49:42,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:49:42,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:49:42,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:49:42,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:49:42,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:49:42,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:49:42,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:49:42,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:49:42,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:49:42,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:49:42,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:42,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:49:42,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:49:42,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:49:42,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:49:42,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:49:42,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:49:42,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:49:42,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:49:42,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:49:42,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:49:42,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:49:42,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:49:42,959 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:49:42,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_5.c [2020-12-22 04:49:43,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563237ab2/184d9f1254024fbda8425ea660768d8e/FLAG87daf1d12 [2020-12-22 04:49:43,734 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:49:43,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_5.c [2020-12-22 04:49:43,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563237ab2/184d9f1254024fbda8425ea660768d8e/FLAG87daf1d12 [2020-12-22 04:49:44,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563237ab2/184d9f1254024fbda8425ea660768d8e [2020-12-22 04:49:44,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:49:44,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:49:44,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:44,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:49:44,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:49:44,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117f04d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44, skipping insertion in model container [2020-12-22 04:49:44,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:49:44,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:49:44,286 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/loop-simple/nested_5.c[899,912] [2020-12-22 04:49:44,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:44,304 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:49:44,323 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/loop-simple/nested_5.c[899,912] [2020-12-22 04:49:44,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:44,341 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:49:44,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44 WrapperNode [2020-12-22 04:49:44,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:44,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:44,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:49:44,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:49:44,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:44,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:49:44,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:49:44,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:49:44,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (1/1) ... [2020-12-22 04:49:44,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:49:44,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:49:44,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:49:44,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:49:44,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (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 04:49:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:49:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:49:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:49:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:49:44,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:49:44,901 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 04:49:44,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:44 BoogieIcfgContainer [2020-12-22 04:49:44,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:49:44,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:49:44,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:49:44,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:49:44,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:44" (1/3) ... [2020-12-22 04:49:44,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2899594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:44, skipping insertion in model container [2020-12-22 04:49:44,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:44" (2/3) ... [2020-12-22 04:49:44,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2899594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:44, skipping insertion in model container [2020-12-22 04:49:44,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:44" (3/3) ... [2020-12-22 04:49:44,941 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.c [2020-12-22 04:49:44,952 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:49:44,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:49:45,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:49:45,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:49:45,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:49:45,055 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:49:45,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:49:45,055 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:49:45,055 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:49:45,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:49:45,056 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:49:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-22 04:49:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:45,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:45,084 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 28698534, now seen corresponding path program 1 times [2020-12-22 04:49:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587176390] [2020-12-22 04:49:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,373 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 04:49:45,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587176390] [2020-12-22 04:49:45,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:45,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:45,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47895644] [2020-12-22 04:49:45,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:45,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:45,412 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-22 04:49:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,473 INFO L93 Difference]: Finished difference Result 46 states and 76 transitions. [2020-12-22 04:49:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:45,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 04:49:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,487 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:49:45,487 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:49:45,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:49:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2020-12-22 04:49:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:49:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-22 04:49:45,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 5 [2020-12-22 04:49:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,530 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-22 04:49:45,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-22 04:49:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:49:45,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:49:45,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash 270418006, now seen corresponding path program 1 times [2020-12-22 04:49:45,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657199961] [2020-12-22 04:49:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,576 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 04:49:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657199961] [2020-12-22 04:49:45,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:45,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:45,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395901111] [2020-12-22 04:49:45,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:45,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:45,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:45,580 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2020-12-22 04:49:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,609 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2020-12-22 04:49:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:45,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:49:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,611 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:49:45,612 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:49:45,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:49:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2020-12-22 04:49:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:49:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-22 04:49:45,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2020-12-22 04:49:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,618 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-22 04:49:45,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-22 04:49:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:49:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:49:45,620 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1592253138, now seen corresponding path program 1 times [2020-12-22 04:49:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955542388] [2020-12-22 04:49:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:45,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955542388] [2020-12-22 04:49:45,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:45,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:45,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116536905] [2020-12-22 04:49:45,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:45,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:45,671 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2020-12-22 04:49:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,698 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-22 04:49:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:45,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 04:49:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,700 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:49:45,700 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:49:45,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:49:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-12-22 04:49:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:49:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-22 04:49:45,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-12-22 04:49:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,711 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-22 04:49:45,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-22 04:49:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:49:45,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:49:45,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1010250086, now seen corresponding path program 1 times [2020-12-22 04:49:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029918602] [2020-12-22 04:49:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:45,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029918602] [2020-12-22 04:49:45,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:45,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:45,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227414883] [2020-12-22 04:49:45,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:45,801 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2020-12-22 04:49:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,826 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2020-12-22 04:49:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:45,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 04:49:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,828 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:49:45,828 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:49:45,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:49:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-22 04:49:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:49:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-22 04:49:45,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2020-12-22 04:49:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,834 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-22 04:49:45,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-22 04:49:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:49:45,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:49:45,835 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 884246574, now seen corresponding path program 1 times [2020-12-22 04:49:45,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946144618] [2020-12-22 04:49:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:45,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946144618] [2020-12-22 04:49:45,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:45,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953138016] [2020-12-22 04:49:45,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:45,913 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2020-12-22 04:49:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,934 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-22 04:49:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:45,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 04:49:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,936 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:49:45,936 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:49:45,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:49:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 04:49:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:49:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 04:49:45,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 17 [2020-12-22 04:49:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,942 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 04:49:45,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 04:49:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:49:45,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:49:45,944 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash 291300972, now seen corresponding path program 1 times [2020-12-22 04:49:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536591557] [2020-12-22 04:49:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:45,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536591557] [2020-12-22 04:49:45,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656522725] [2020-12-22 04:49:45,988 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 04:49:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:46,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:46,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249465930] [2020-12-22 04:49:46,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:46,202 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-12-22 04:49:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:46,241 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-22 04:49:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:49:46,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-22 04:49:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:46,244 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:49:46,244 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:49:46,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 04:49:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:49:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 04:49:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:49:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-22 04:49:46,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2020-12-22 04:49:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:46,253 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-22 04:49:46,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-22 04:49:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:49:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:46,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:46,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:49:46,469 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1701227818, now seen corresponding path program 2 times [2020-12-22 04:49:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618427571] [2020-12-22 04:49:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:46,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618427571] [2020-12-22 04:49:46,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766555864] [2020-12-22 04:49:46,546 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 04:49:46,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:46,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 04:49:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275982848] [2020-12-22 04:49:46,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:46,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:46,774 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-22 04:49:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:47,034 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-12-22 04:49:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:49:47,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-22 04:49:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:47,036 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:49:47,036 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:49:47,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:49:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:49:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2020-12-22 04:49:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:49:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-22 04:49:47,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 21 [2020-12-22 04:49:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:47,047 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-22 04:49:47,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-22 04:49:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:49:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:47,049 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:47,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:47,264 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -291735974, now seen corresponding path program 3 times [2020-12-22 04:49:47,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:47,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75702176] [2020-12-22 04:49:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 04:49:47,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75702176] [2020-12-22 04:49:47,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870337795] [2020-12-22 04:49:47,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:49:47,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:49:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:49:47,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:47,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:49:47,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615464259] [2020-12-22 04:49:47,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:47,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:47,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:47,509 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-12-22 04:49:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:47,654 INFO L93 Difference]: Finished difference Result 239 states and 281 transitions. [2020-12-22 04:49:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:49:47,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-12-22 04:49:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:47,657 INFO L225 Difference]: With dead ends: 239 [2020-12-22 04:49:47,657 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 04:49:47,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:49:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 04:49:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-12-22 04:49:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:49:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-12-22 04:49:47,676 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 32 [2020-12-22 04:49:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:47,676 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-12-22 04:49:47,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-12-22 04:49:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 04:49:47,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:47,680 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:47,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:47,896 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2113646594, now seen corresponding path program 4 times [2020-12-22 04:49:47,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:47,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982903890] [2020-12-22 04:49:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 472 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 04:49:47,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982903890] [2020-12-22 04:49:47,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900876821] [2020-12-22 04:49:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:49:48,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 196 proven. 9 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-12-22 04:49:48,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:48,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2020-12-22 04:49:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048141419] [2020-12-22 04:49:48,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:48,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:48,426 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 8 states. [2020-12-22 04:49:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:48,677 INFO L93 Difference]: Finished difference Result 450 states and 536 transitions. [2020-12-22 04:49:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:49:48,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2020-12-22 04:49:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:48,681 INFO L225 Difference]: With dead ends: 450 [2020-12-22 04:49:48,681 INFO L226 Difference]: Without dead ends: 352 [2020-12-22 04:49:48,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:49:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-22 04:49:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 224. [2020-12-22 04:49:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 04:49:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2020-12-22 04:49:48,739 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 101 [2020-12-22 04:49:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:48,741 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2020-12-22 04:49:48,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2020-12-22 04:49:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 04:49:48,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:48,752 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:48,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:48,970 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1556657574, now seen corresponding path program 5 times [2020-12-22 04:49:48,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:48,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899378211] [2020-12-22 04:49:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 656 proven. 16 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2020-12-22 04:49:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899378211] [2020-12-22 04:49:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550440879] [2020-12-22 04:49:49,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 04:49:49,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:49:49,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:49,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 2643 proven. 16 refuted. 0 times theorem prover too weak. 3032 trivial. 0 not checked. [2020-12-22 04:49:49,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:49,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925276594] [2020-12-22 04:49:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:49,613 INFO L87 Difference]: Start difference. First operand 224 states and 254 transitions. Second operand 8 states. [2020-12-22 04:49:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:49,662 INFO L93 Difference]: Finished difference Result 481 states and 556 transitions. [2020-12-22 04:49:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:49,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 223 [2020-12-22 04:49:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:49,664 INFO L225 Difference]: With dead ends: 481 [2020-12-22 04:49:49,664 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 04:49:49,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 04:49:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 256. [2020-12-22 04:49:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-22 04:49:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 286 transitions. [2020-12-22 04:49:49,701 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 286 transitions. Word has length 223 [2020-12-22 04:49:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:49,701 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 286 transitions. [2020-12-22 04:49:49,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 286 transitions. [2020-12-22 04:49:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 04:49:49,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:49,710 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:49,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:49:49,926 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1159239078, now seen corresponding path program 6 times [2020-12-22 04:49:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:49,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914086822] [2020-12-22 04:49:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8235 backedges. 956 proven. 25 refuted. 0 times theorem prover too weak. 7254 trivial. 0 not checked. [2020-12-22 04:49:50,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914086822] [2020-12-22 04:49:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361356813] [2020-12-22 04:49:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 04:49:50,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-12-22 04:49:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:50,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8235 backedges. 3823 proven. 25 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2020-12-22 04:49:50,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:50,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:50,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952176667] [2020-12-22 04:49:50,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:50,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:50,690 INFO L87 Difference]: Start difference. First operand 256 states and 286 transitions. Second operand 9 states. [2020-12-22 04:49:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:50,758 INFO L93 Difference]: Finished difference Result 527 states and 602 transitions. [2020-12-22 04:49:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:50,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 255 [2020-12-22 04:49:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:50,761 INFO L225 Difference]: With dead ends: 527 [2020-12-22 04:49:50,761 INFO L226 Difference]: Without dead ends: 288 [2020-12-22 04:49:50,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-12-22 04:49:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-12-22 04:49:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 04:49:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 318 transitions. [2020-12-22 04:49:50,784 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 318 transitions. Word has length 255 [2020-12-22 04:49:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:50,785 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 318 transitions. [2020-12-22 04:49:50,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 318 transitions. [2020-12-22 04:49:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-12-22 04:49:50,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:50,789 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:51,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:51,002 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1567066714, now seen corresponding path program 7 times [2020-12-22 04:49:51,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:51,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496131319] [2020-12-22 04:49:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11291 backedges. 2489 proven. 89 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2020-12-22 04:49:51,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496131319] [2020-12-22 04:49:51,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974794940] [2020-12-22 04:49:51,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11291 backedges. 2489 proven. 89 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2020-12-22 04:49:51,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:51,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:49:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796183236] [2020-12-22 04:49:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:51,648 INFO L87 Difference]: Start difference. First operand 288 states and 318 transitions. Second operand 6 states. [2020-12-22 04:49:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:51,720 INFO L93 Difference]: Finished difference Result 772 states and 853 transitions. [2020-12-22 04:49:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:51,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 287 [2020-12-22 04:49:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:51,724 INFO L225 Difference]: With dead ends: 772 [2020-12-22 04:49:51,724 INFO L226 Difference]: Without dead ends: 520 [2020-12-22 04:49:51,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 287 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 04:49:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-12-22 04:49:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 408. [2020-12-22 04:49:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 04:49:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 446 transitions. [2020-12-22 04:49:51,765 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 446 transitions. Word has length 287 [2020-12-22 04:49:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:51,768 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 446 transitions. [2020-12-22 04:49:51,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 446 transitions. [2020-12-22 04:49:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-12-22 04:49:51,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:51,775 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:51,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:51,990 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2008351322, now seen corresponding path program 8 times [2020-12-22 04:49:51,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:51,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997514190] [2020-12-22 04:49:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25215 backedges. 5548 proven. 264 refuted. 0 times theorem prover too weak. 19403 trivial. 0 not checked. [2020-12-22 04:49:52,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997514190] [2020-12-22 04:49:52,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906728066] [2020-12-22 04:49:52,363 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:52,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:52,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25215 backedges. 5548 proven. 264 refuted. 0 times theorem prover too weak. 19403 trivial. 0 not checked. [2020-12-22 04:49:52,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:52,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296506889] [2020-12-22 04:49:52,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:52,978 INFO L87 Difference]: Start difference. First operand 408 states and 446 transitions. Second operand 7 states. [2020-12-22 04:49:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:53,047 INFO L93 Difference]: Finished difference Result 997 states and 1093 transitions. [2020-12-22 04:49:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:49:53,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 407 [2020-12-22 04:49:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:53,051 INFO L225 Difference]: With dead ends: 997 [2020-12-22 04:49:53,051 INFO L226 Difference]: Without dead ends: 640 [2020-12-22 04:49:53,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-12-22 04:49:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 528. [2020-12-22 04:49:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-12-22 04:49:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 574 transitions. [2020-12-22 04:49:53,090 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 574 transitions. Word has length 407 [2020-12-22 04:49:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:53,090 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 574 transitions. [2020-12-22 04:49:53,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 574 transitions. [2020-12-22 04:49:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-12-22 04:49:53,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:53,101 INFO L422 BasicCegarLoop]: trace histogram [192, 192, 32, 32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:53,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:49:53,315 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:53,316 INFO L82 PathProgramCache]: Analyzing trace with hash 112297382, now seen corresponding path program 9 times [2020-12-22 04:49:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:53,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728491461] [2020-12-22 04:49:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 44707 backedges. 9825 proven. 526 refuted. 0 times theorem prover too weak. 34356 trivial. 0 not checked. [2020-12-22 04:49:53,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728491461] [2020-12-22 04:49:53,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947471361] [2020-12-22 04:49:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:53,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2020-12-22 04:49:53,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:53,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 44707 backedges. 9836 proven. 526 refuted. 0 times theorem prover too weak. 34345 trivial. 0 not checked. [2020-12-22 04:49:54,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:54,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:54,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842452618] [2020-12-22 04:49:54,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:54,557 INFO L87 Difference]: Start difference. First operand 528 states and 574 transitions. Second operand 8 states. [2020-12-22 04:49:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:54,639 INFO L93 Difference]: Finished difference Result 1222 states and 1333 transitions. [2020-12-22 04:49:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:54,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 527 [2020-12-22 04:49:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:54,643 INFO L225 Difference]: With dead ends: 1222 [2020-12-22 04:49:54,643 INFO L226 Difference]: Without dead ends: 760 [2020-12-22 04:49:54,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2020-12-22 04:49:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 648. [2020-12-22 04:49:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-12-22 04:49:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 702 transitions. [2020-12-22 04:49:54,691 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 702 transitions. Word has length 527 [2020-12-22 04:49:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:54,692 INFO L481 AbstractCegarLoop]: Abstraction has 648 states and 702 transitions. [2020-12-22 04:49:54,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 702 transitions. [2020-12-22 04:49:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2020-12-22 04:49:54,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:54,710 INFO L422 BasicCegarLoop]: trace histogram [240, 240, 40, 40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:54,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:54,926 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash 492047782, now seen corresponding path program 10 times [2020-12-22 04:49:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602538894] [2020-12-22 04:49:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 69767 backedges. 15320 proven. 875 refuted. 0 times theorem prover too weak. 53572 trivial. 0 not checked. [2020-12-22 04:49:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602538894] [2020-12-22 04:49:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155815242] [2020-12-22 04:49:55,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:55,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 69767 backedges. 15320 proven. 875 refuted. 0 times theorem prover too weak. 53572 trivial. 0 not checked. [2020-12-22 04:49:56,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:56,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106084862] [2020-12-22 04:49:56,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:56,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:56,314 INFO L87 Difference]: Start difference. First operand 648 states and 702 transitions. Second operand 9 states. [2020-12-22 04:49:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:56,421 INFO L93 Difference]: Finished difference Result 1335 states and 1453 transitions. [2020-12-22 04:49:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:56,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 647 [2020-12-22 04:49:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:56,425 INFO L225 Difference]: With dead ends: 1335 [2020-12-22 04:49:56,426 INFO L226 Difference]: Without dead ends: 768 [2020-12-22 04:49:56,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-12-22 04:49:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2020-12-22 04:49:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-12-22 04:49:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 830 transitions. [2020-12-22 04:49:56,484 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 830 transitions. Word has length 647 [2020-12-22 04:49:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:56,485 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 830 transitions. [2020-12-22 04:49:56,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 830 transitions. [2020-12-22 04:49:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2020-12-22 04:49:56,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:56,492 INFO L422 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:56,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:49:56,707 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1921608282, now seen corresponding path program 11 times [2020-12-22 04:49:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:56,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242956500] [2020-12-22 04:49:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 100395 backedges. 37786 proven. 3149 refuted. 0 times theorem prover too weak. 59460 trivial. 0 not checked. [2020-12-22 04:49:57,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242956500] [2020-12-22 04:49:57,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31847954] [2020-12-22 04:49:57,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:57,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2020-12-22 04:49:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100395 backedges. 62978 proven. 3149 refuted. 0 times theorem prover too weak. 34268 trivial. 0 not checked. [2020-12-22 04:49:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:58,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:49:58,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023108570] [2020-12-22 04:49:58,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:58,383 INFO L87 Difference]: Start difference. First operand 768 states and 830 transitions. Second operand 6 states. [2020-12-22 04:49:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:58,504 INFO L93 Difference]: Finished difference Result 2085 states and 2254 transitions. [2020-12-22 04:49:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:58,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 767 [2020-12-22 04:49:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:58,512 INFO L225 Difference]: With dead ends: 2085 [2020-12-22 04:49:58,512 INFO L226 Difference]: Without dead ends: 1508 [2020-12-22 04:49:58,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 767 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 04:49:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2020-12-22 04:49:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1140. [2020-12-22 04:49:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1140 states. [2020-12-22 04:49:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1230 transitions. [2020-12-22 04:49:58,595 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1230 transitions. Word has length 767 [2020-12-22 04:49:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:58,595 INFO L481 AbstractCegarLoop]: Abstraction has 1140 states and 1230 transitions. [2020-12-22 04:49:58,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1230 transitions. [2020-12-22 04:49:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2020-12-22 04:49:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:58,609 INFO L422 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:58,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:49:58,824 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1982396250, now seen corresponding path program 12 times [2020-12-22 04:49:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604789426] [2020-12-22 04:49:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 226105 backedges. 84997 proven. 9444 refuted. 0 times theorem prover too weak. 131664 trivial. 0 not checked. [2020-12-22 04:50:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604789426] [2020-12-22 04:50:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85097343] [2020-12-22 04:50:00,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:00,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 193 check-sat command(s) [2020-12-22 04:50:00,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:50:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 226105 backedges. 85001 proven. 9444 refuted. 0 times theorem prover too weak. 131660 trivial. 0 not checked. [2020-12-22 04:50:02,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:02,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:50:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750796794] [2020-12-22 04:50:02,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:50:02,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:02,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:50:02,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:50:02,648 INFO L87 Difference]: Start difference. First operand 1140 states and 1230 transitions. Second operand 7 states. [2020-12-22 04:50:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:02,789 INFO L93 Difference]: Finished difference Result 2736 states and 2954 transitions. [2020-12-22 04:50:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:50:02,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1139 [2020-12-22 04:50:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:02,798 INFO L225 Difference]: With dead ends: 2736 [2020-12-22 04:50:02,799 INFO L226 Difference]: Without dead ends: 1880 [2020-12-22 04:50:02,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1139 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:50:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-12-22 04:50:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1512. [2020-12-22 04:50:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-12-22 04:50:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1630 transitions. [2020-12-22 04:50:02,905 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1630 transitions. Word has length 1139 [2020-12-22 04:50:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:02,906 INFO L481 AbstractCegarLoop]: Abstraction has 1512 states and 1630 transitions. [2020-12-22 04:50:02,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:50:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1630 transitions. [2020-12-22 04:50:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1512 [2020-12-22 04:50:02,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:02,927 INFO L422 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:50:03,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:50:03,141 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash 58666406, now seen corresponding path program 13 times [2020-12-22 04:50:03,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:03,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834817382] [2020-12-22 04:50:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 402167 backedges. 151090 proven. 18886 refuted. 0 times theorem prover too weak. 232191 trivial. 0 not checked. [2020-12-22 04:50:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834817382] [2020-12-22 04:50:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208593738] [2020-12-22 04:50:05,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:50:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 402167 backedges. 151090 proven. 18886 refuted. 0 times theorem prover too weak. 232191 trivial. 0 not checked. [2020-12-22 04:50:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:08,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:50:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383950190] [2020-12-22 04:50:08,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:50:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:50:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:50:08,016 INFO L87 Difference]: Start difference. First operand 1512 states and 1630 transitions. Second operand 8 states. [2020-12-22 04:50:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:08,189 INFO L93 Difference]: Finished difference Result 3387 states and 3654 transitions. [2020-12-22 04:50:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:50:08,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1511 [2020-12-22 04:50:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:08,201 INFO L225 Difference]: With dead ends: 3387 [2020-12-22 04:50:08,201 INFO L226 Difference]: Without dead ends: 2252 [2020-12-22 04:50:08,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1511 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:50:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2020-12-22 04:50:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1884. [2020-12-22 04:50:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-12-22 04:50:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2030 transitions. [2020-12-22 04:50:08,326 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2030 transitions. Word has length 1511 [2020-12-22 04:50:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:08,327 INFO L481 AbstractCegarLoop]: Abstraction has 1884 states and 2030 transitions. [2020-12-22 04:50:08,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:50:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2030 transitions. [2020-12-22 04:50:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2020-12-22 04:50:08,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:08,358 INFO L422 BasicCegarLoop]: trace histogram [720, 720, 120, 120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:50:08,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:50:08,573 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash 574149798, now seen corresponding path program 14 times [2020-12-22 04:50:08,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:08,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158246321] [2020-12-22 04:50:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 628581 backedges. 236065 proven. 31475 refuted. 0 times theorem prover too weak. 361041 trivial. 0 not checked. [2020-12-22 04:50:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158246321] [2020-12-22 04:50:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922477893] [2020-12-22 04:50:11,791 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:12,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:50:12,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:50:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 628581 backedges. 236065 proven. 31475 refuted. 0 times theorem prover too weak. 361041 trivial. 0 not checked. [2020-12-22 04:50:15,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:15,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:50:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005089342] [2020-12-22 04:50:15,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:50:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:50:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:50:15,566 INFO L87 Difference]: Start difference. First operand 1884 states and 2030 transitions. Second operand 9 states. [2020-12-22 04:50:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:15,735 INFO L93 Difference]: Finished difference Result 3670 states and 3958 transitions. [2020-12-22 04:50:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:50:15,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1883 [2020-12-22 04:50:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:15,746 INFO L225 Difference]: With dead ends: 3670 [2020-12-22 04:50:15,746 INFO L226 Difference]: Without dead ends: 2256 [2020-12-22 04:50:15,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1890 GetRequests, 1883 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:50:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2020-12-22 04:50:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2256. [2020-12-22 04:50:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2256 states. [2020-12-22 04:50:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 2430 transitions. [2020-12-22 04:50:15,887 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 2430 transitions. Word has length 1883 [2020-12-22 04:50:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:15,888 INFO L481 AbstractCegarLoop]: Abstraction has 2256 states and 2430 transitions. [2020-12-22 04:50:15,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:50:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 2430 transitions. [2020-12-22 04:50:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2256 [2020-12-22 04:50:15,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:15,926 INFO L422 BasicCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:50:16,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:16,127 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1623901606, now seen corresponding path program 15 times [2020-12-22 04:50:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:16,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654328812] [2020-12-22 04:50:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 905347 backedges. 453235 proven. 113309 refuted. 0 times theorem prover too weak. 338803 trivial. 0 not checked. [2020-12-22 04:50:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654328812] [2020-12-22 04:50:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516911096] [2020-12-22 04:50:20,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:23,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 377 check-sat command(s) [2020-12-22 04:50:23,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:50:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 905347 backedges. 453236 proven. 113309 refuted. 0 times theorem prover too weak. 338802 trivial. 0 not checked. [2020-12-22 04:50:28,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:28,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:50:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917150330] [2020-12-22 04:50:28,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:50:28,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:50:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:50:28,006 INFO L87 Difference]: Start difference. First operand 2256 states and 2430 transitions. Second operand 6 states. [2020-12-22 04:50:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:28,246 INFO L93 Difference]: Finished difference Result 5628 states and 6063 transitions. [2020-12-22 04:50:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:50:28,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 2255 [2020-12-22 04:50:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:28,270 INFO L225 Difference]: With dead ends: 5628 [2020-12-22 04:50:28,270 INFO L226 Difference]: Without dead ends: 4498 [2020-12-22 04:50:28,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2259 GetRequests, 2255 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 04:50:28,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2020-12-22 04:50:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 3378. [2020-12-22 04:50:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2020-12-22 04:50:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3638 transitions. [2020-12-22 04:50:28,512 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3638 transitions. Word has length 2255 [2020-12-22 04:50:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:28,515 INFO L481 AbstractCegarLoop]: Abstraction has 3378 states and 3638 transitions. [2020-12-22 04:50:28,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:50:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3638 transitions. [2020-12-22 04:50:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3378 [2020-12-22 04:50:28,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:28,585 INFO L422 BasicCegarLoop]: trace histogram [1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:50:28,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:28,787 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash -951274498, now seen corresponding path program 16 times [2020-12-22 04:50:28,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:28,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334296377] [2020-12-22 04:50:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2037860 backedges. 1019772 proven. 339924 refuted. 0 times theorem prover too weak. 678164 trivial. 0 not checked. [2020-12-22 04:50:39,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334296377] [2020-12-22 04:50:39,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736068543] [2020-12-22 04:50:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:41,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:50:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 5463 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:50:41,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2037860 backedges. 1019772 proven. 339924 refuted. 0 times theorem prover too weak. 678164 trivial. 0 not checked. [2020-12-22 04:50:49,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:49,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:50:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448779954] [2020-12-22 04:50:49,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:50:49,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:50:49,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:50:49,734 INFO L87 Difference]: Start difference. First operand 3378 states and 3638 transitions. Second operand 7 states. [2020-12-22 04:50:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:50,063 INFO L93 Difference]: Finished difference Result 7311 states and 7875 transitions. [2020-12-22 04:50:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:50:50,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 3377 [2020-12-22 04:50:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:50,091 INFO L225 Difference]: With dead ends: 7311 [2020-12-22 04:50:50,091 INFO L226 Difference]: Without dead ends: 5620 [2020-12-22 04:50:50,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3382 GetRequests, 3377 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:50:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2020-12-22 04:50:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 4500. [2020-12-22 04:50:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4500 states. [2020-12-22 04:50:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 4846 transitions. [2020-12-22 04:50:50,427 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 4846 transitions. Word has length 3377 [2020-12-22 04:50:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:50,430 INFO L481 AbstractCegarLoop]: Abstraction has 4500 states and 4846 transitions. [2020-12-22 04:50:50,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:50:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 4846 transitions. [2020-12-22 04:50:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4500 [2020-12-22 04:50:50,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:50,612 INFO L422 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:50:50,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:50,828 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash 694903206, now seen corresponding path program 17 times [2020-12-22 04:50:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023308652] [2020-12-22 04:50:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:51:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3623601 backedges. 1812923 proven. 679846 refuted. 0 times theorem prover too weak. 1130832 trivial. 0 not checked. [2020-12-22 04:51:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023308652] [2020-12-22 04:51:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484453849] [2020-12-22 04:51:07,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:51:18,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1002 check-sat command(s) [2020-12-22 04:51:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:51:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 7262 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:51:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:51:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3623601 backedges. 1812923 proven. 679846 refuted. 0 times theorem prover too weak. 1130832 trivial. 0 not checked. [2020-12-22 04:51:33,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:51:33,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:51:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388050569] [2020-12-22 04:51:33,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:51:33,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:51:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:51:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:51:33,710 INFO L87 Difference]: Start difference. First operand 4500 states and 4846 transitions. Second operand 8 states. [2020-12-22 04:51:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:51:34,147 INFO L93 Difference]: Finished difference Result 8994 states and 9687 transitions. [2020-12-22 04:51:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:51:34,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4499 [2020-12-22 04:51:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:51:34,184 INFO L225 Difference]: With dead ends: 8994 [2020-12-22 04:51:34,184 INFO L226 Difference]: Without dead ends: 6742 [2020-12-22 04:51:34,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4505 GetRequests, 4499 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:51:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2020-12-22 04:51:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 5622. [2020-12-22 04:51:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5622 states. [2020-12-22 04:51:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 6054 transitions. [2020-12-22 04:51:34,622 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 6054 transitions. Word has length 4499 [2020-12-22 04:51:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:51:34,625 INFO L481 AbstractCegarLoop]: Abstraction has 5622 states and 6054 transitions. [2020-12-22 04:51:34,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:51:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 6054 transitions. [2020-12-22 04:51:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5622 [2020-12-22 04:51:34,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:51:34,891 INFO L422 BasicCegarLoop]: trace histogram [2160, 2160, 360, 360, 360, 60, 60, 60, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:51:35,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:51:35,097 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:51:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:51:35,099 INFO L82 PathProgramCache]: Analyzing trace with hash 129948158, now seen corresponding path program 18 times [2020-12-22 04:51:35,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:51:35,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333763232] [2020-12-22 04:51:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:51:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5662570 backedges. 2832688 proven. 1133075 refuted. 0 times theorem prover too weak. 1696807 trivial. 0 not checked. [2020-12-22 04:52:00,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333763232] [2020-12-22 04:52:00,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547812120] [2020-12-22 04:52:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:20,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1066 check-sat command(s) [2020-12-22 04:52:20,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 6842 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:52:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5662570 backedges. 0 proven. 2832690 refuted. 0 times theorem prover too weak. 2829880 trivial. 0 not checked. [2020-12-22 04:52:49,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-22 04:52:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872951346] [2020-12-22 04:52:49,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:52:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:52:49,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:52:49,741 INFO L87 Difference]: Start difference. First operand 5622 states and 6054 transitions. Second operand 11 states. [2020-12-22 04:52:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:50,621 INFO L93 Difference]: Finished difference Result 16294 states and 17551 transitions. [2020-12-22 04:52:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:52:50,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5621 [2020-12-22 04:52:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:50,659 INFO L225 Difference]: With dead ends: 16294 [2020-12-22 04:52:50,660 INFO L226 Difference]: Without dead ends: 13481 [2020-12-22 04:52:50,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5646 GetRequests, 5619 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:52:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13481 states. [2020-12-22 04:52:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13481 to 10113. [2020-12-22 04:52:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10113 states. [2020-12-22 04:52:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10113 states to 10113 states and 10890 transitions. [2020-12-22 04:52:51,383 INFO L78 Accepts]: Start accepts. Automaton has 10113 states and 10890 transitions. Word has length 5621 [2020-12-22 04:52:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:51,386 INFO L481 AbstractCegarLoop]: Abstraction has 10113 states and 10890 transitions. [2020-12-22 04:52:51,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:52:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10113 states and 10890 transitions. [2020-12-22 04:52:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10113 [2020-12-22 04:52:51,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:51,971 INFO L422 BasicCegarLoop]: trace histogram [3888, 3888, 648, 648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 04:52:52,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:52:52,172 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1006391510, now seen corresponding path program 19 times [2020-12-22 04:52:52,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:52,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463344995] [2020-12-22 04:52:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat