/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/eca-rers2012/Problem15_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:02:01,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:02:01,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:02:01,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:02:01,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:02:01,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:02:01,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:02:01,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:02:01,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:02:01,382 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:02:01,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:02:01,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:02:01,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:02:01,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:02:01,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:02:01,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:02:01,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:02:01,384 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:02:01,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:02:01,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:02:01,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:02:01,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:02:01,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:02:01,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:02:01,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:02:01,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:02:01,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:02:01,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:02:01,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:02:01,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:02:01,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:02:02,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:02:02,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:02:02,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:02:02,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:02:02,086 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:02:02,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label17.c [2020-12-22 02:02:02,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb09c171/59a2643fa3d14abb99a21c474371745c/FLAGa3b1943c7 [2020-12-22 02:02:03,240 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:02:03,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label17.c [2020-12-22 02:02:03,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb09c171/59a2643fa3d14abb99a21c474371745c/FLAGa3b1943c7 [2020-12-22 02:02:03,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb09c171/59a2643fa3d14abb99a21c474371745c [2020-12-22 02:02:03,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:02:03,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:02:03,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:02:03,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:02:03,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:02:03,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:03" (1/1) ... [2020-12-22 02:02:03,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414bbf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:03, skipping insertion in model container [2020-12-22 02:02:03,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:02:03" (1/1) ... [2020-12-22 02:02:03,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:02:03,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:02:03,904 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/eca-rers2012/Problem15_label17.c[7664,7677] [2020-12-22 02:02:04,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:02:04,576 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:02:04,629 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/eca-rers2012/Problem15_label17.c[7664,7677] [2020-12-22 02:02:04,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:02:04,903 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:02:04,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04 WrapperNode [2020-12-22 02:02:04,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:02:04,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:02:04,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:02:04,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:02:04,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:02:05,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:02:05,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:02:05,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:02:05,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (1/1) ... [2020-12-22 02:02:05,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:02:05,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:02:05,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:02:05,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:02:05,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (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 02:02:06,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:02:06,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:02:06,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:02:06,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:02:10,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:02:10,261 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:02:10,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:10 BoogieIcfgContainer [2020-12-22 02:02:10,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:02:10,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:02:10,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:02:10,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:02:10,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:02:03" (1/3) ... [2020-12-22 02:02:10,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f64c87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:10, skipping insertion in model container [2020-12-22 02:02:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:02:04" (2/3) ... [2020-12-22 02:02:10,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f64c87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:02:10, skipping insertion in model container [2020-12-22 02:02:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:02:10" (3/3) ... [2020-12-22 02:02:10,279 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2020-12-22 02:02:10,289 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:02:10,295 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:02:10,315 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:02:10,369 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:02:10,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:02:10,370 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:02:10,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:02:10,371 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:02:10,371 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:02:10,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:02:10,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:02:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2020-12-22 02:02:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 02:02:10,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:10,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:10,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2020-12-22 02:02:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:10,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678346478] [2020-12-22 02:02:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:10,929 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 02:02:10,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678346478] [2020-12-22 02:02:10,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:10,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:02:10,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567337916] [2020-12-22 02:02:10,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:10,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:10,963 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 3 states. [2020-12-22 02:02:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:15,194 INFO L93 Difference]: Finished difference Result 1191 states and 2157 transitions. [2020-12-22 02:02:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:15,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 02:02:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:15,222 INFO L225 Difference]: With dead ends: 1191 [2020-12-22 02:02:15,223 INFO L226 Difference]: Without dead ends: 688 [2020-12-22 02:02:15,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:02:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-12-22 02:02:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 680. [2020-12-22 02:02:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-12-22 02:02:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1093 transitions. [2020-12-22 02:02:15,393 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1093 transitions. Word has length 63 [2020-12-22 02:02:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:15,394 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 1093 transitions. [2020-12-22 02:02:15,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:15,394 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1093 transitions. [2020-12-22 02:02:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 02:02:15,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:15,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:15,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:02:15,403 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1963228353, now seen corresponding path program 1 times [2020-12-22 02:02:15,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:15,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809645145] [2020-12-22 02:02:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:02:15,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809645145] [2020-12-22 02:02:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:02:15,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111355796] [2020-12-22 02:02:15,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:15,712 INFO L87 Difference]: Start difference. First operand 680 states and 1093 transitions. Second operand 3 states. [2020-12-22 02:02:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:18,387 INFO L93 Difference]: Finished difference Result 1964 states and 3171 transitions. [2020-12-22 02:02:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:18,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 02:02:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:18,396 INFO L225 Difference]: With dead ends: 1964 [2020-12-22 02:02:18,397 INFO L226 Difference]: Without dead ends: 1286 [2020-12-22 02:02:18,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:02:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-12-22 02:02:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1281. [2020-12-22 02:02:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-22 02:02:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1786 transitions. [2020-12-22 02:02:18,444 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1786 transitions. Word has length 131 [2020-12-22 02:02:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:18,445 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1786 transitions. [2020-12-22 02:02:18,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1786 transitions. [2020-12-22 02:02:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 02:02:18,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:18,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:18,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:02:18,452 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:18,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1160975019, now seen corresponding path program 1 times [2020-12-22 02:02:18,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:18,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220649699] [2020-12-22 02:02:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:02:18,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220649699] [2020-12-22 02:02:18,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:18,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:02:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247680262] [2020-12-22 02:02:18,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:18,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:18,730 INFO L87 Difference]: Start difference. First operand 1281 states and 1786 transitions. Second operand 3 states. [2020-12-22 02:02:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:22,417 INFO L93 Difference]: Finished difference Result 2859 states and 3905 transitions. [2020-12-22 02:02:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:22,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 02:02:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:22,429 INFO L225 Difference]: With dead ends: 2859 [2020-12-22 02:02:22,430 INFO L226 Difference]: Without dead ends: 1580 [2020-12-22 02:02:22,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:02:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2020-12-22 02:02:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2020-12-22 02:02:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2020-12-22 02:02:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2091 transitions. [2020-12-22 02:02:22,482 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2091 transitions. Word has length 139 [2020-12-22 02:02:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:22,491 INFO L481 AbstractCegarLoop]: Abstraction has 1580 states and 2091 transitions. [2020-12-22 02:02:22,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2091 transitions. [2020-12-22 02:02:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-22 02:02:22,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:22,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:22,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:02:22,504 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash 75098474, now seen corresponding path program 1 times [2020-12-22 02:02:22,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609350165] [2020-12-22 02:02:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-22 02:02:22,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609350165] [2020-12-22 02:02:22,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:22,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:22,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264258782] [2020-12-22 02:02:22,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:22,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:22,788 INFO L87 Difference]: Start difference. First operand 1580 states and 2091 transitions. Second operand 3 states. [2020-12-22 02:02:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:26,004 INFO L93 Difference]: Finished difference Result 4065 states and 5551 transitions. [2020-12-22 02:02:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:26,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2020-12-22 02:02:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:26,024 INFO L225 Difference]: With dead ends: 4065 [2020-12-22 02:02:26,025 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 02:02:26,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 02:02:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2786. [2020-12-22 02:02:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2786 states. [2020-12-22 02:02:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3399 transitions. [2020-12-22 02:02:26,100 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3399 transitions. Word has length 230 [2020-12-22 02:02:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:26,103 INFO L481 AbstractCegarLoop]: Abstraction has 2786 states and 3399 transitions. [2020-12-22 02:02:26,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3399 transitions. [2020-12-22 02:02:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 02:02:26,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:26,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:26,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:02:26,108 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1852515434, now seen corresponding path program 1 times [2020-12-22 02:02:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:26,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650753782] [2020-12-22 02:02:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 02:02:26,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650753782] [2020-12-22 02:02:26,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:26,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:02:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570381249] [2020-12-22 02:02:26,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:26,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:26,444 INFO L87 Difference]: Start difference. First operand 2786 states and 3399 transitions. Second operand 3 states. [2020-12-22 02:02:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:30,164 INFO L93 Difference]: Finished difference Result 6472 states and 8164 transitions. [2020-12-22 02:02:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:30,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 236 [2020-12-22 02:02:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:30,186 INFO L225 Difference]: With dead ends: 6472 [2020-12-22 02:02:30,186 INFO L226 Difference]: Without dead ends: 3987 [2020-12-22 02:02:30,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:02:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2020-12-22 02:02:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 3686. [2020-12-22 02:02:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2020-12-22 02:02:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 4407 transitions. [2020-12-22 02:02:30,283 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 4407 transitions. Word has length 236 [2020-12-22 02:02:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:30,284 INFO L481 AbstractCegarLoop]: Abstraction has 3686 states and 4407 transitions. [2020-12-22 02:02:30,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 4407 transitions. [2020-12-22 02:02:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-12-22 02:02:30,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:30,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:30,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:02:30,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1238094804, now seen corresponding path program 1 times [2020-12-22 02:02:30,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:30,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916829837] [2020-12-22 02:02:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 02:02:30,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916829837] [2020-12-22 02:02:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:30,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:02:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688343947] [2020-12-22 02:02:30,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:30,867 INFO L87 Difference]: Start difference. First operand 3686 states and 4407 transitions. Second operand 3 states. [2020-12-22 02:02:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:34,200 INFO L93 Difference]: Finished difference Result 9471 states and 11465 transitions. [2020-12-22 02:02:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:34,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-12-22 02:02:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:34,236 INFO L225 Difference]: With dead ends: 9471 [2020-12-22 02:02:34,236 INFO L226 Difference]: Without dead ends: 6086 [2020-12-22 02:02:34,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:02:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2020-12-22 02:02:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5485. [2020-12-22 02:02:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5485 states. [2020-12-22 02:02:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 6412 transitions. [2020-12-22 02:02:34,364 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 6412 transitions. Word has length 345 [2020-12-22 02:02:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:34,364 INFO L481 AbstractCegarLoop]: Abstraction has 5485 states and 6412 transitions. [2020-12-22 02:02:34,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 6412 transitions. [2020-12-22 02:02:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-12-22 02:02:34,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:34,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:34,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:02:34,372 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 207476629, now seen corresponding path program 1 times [2020-12-22 02:02:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:34,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725553347] [2020-12-22 02:02:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 02:02:34,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725553347] [2020-12-22 02:02:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:34,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824494162] [2020-12-22 02:02:34,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:34,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:34,709 INFO L87 Difference]: Start difference. First operand 5485 states and 6412 transitions. Second operand 3 states. [2020-12-22 02:02:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:37,922 INFO L93 Difference]: Finished difference Result 12762 states and 15152 transitions. [2020-12-22 02:02:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:37,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-12-22 02:02:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:37,960 INFO L225 Difference]: With dead ends: 12762 [2020-12-22 02:02:37,960 INFO L226 Difference]: Without dead ends: 7578 [2020-12-22 02:02:37,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2020-12-22 02:02:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 4883. [2020-12-22 02:02:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4883 states. [2020-12-22 02:02:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 5760 transitions. [2020-12-22 02:02:38,101 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 5760 transitions. Word has length 350 [2020-12-22 02:02:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:38,102 INFO L481 AbstractCegarLoop]: Abstraction has 4883 states and 5760 transitions. [2020-12-22 02:02:38,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 5760 transitions. [2020-12-22 02:02:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-12-22 02:02:38,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:38,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:38,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:02:38,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1372922242, now seen corresponding path program 1 times [2020-12-22 02:02:38,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:38,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996870664] [2020-12-22 02:02:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:02:38,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996870664] [2020-12-22 02:02:38,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:38,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:38,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471178417] [2020-12-22 02:02:38,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:38,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:38,745 INFO L87 Difference]: Start difference. First operand 4883 states and 5760 transitions. Second operand 3 states. [2020-12-22 02:02:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:41,738 INFO L93 Difference]: Finished difference Result 9461 states and 11209 transitions. [2020-12-22 02:02:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:41,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2020-12-22 02:02:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:41,763 INFO L225 Difference]: With dead ends: 9461 [2020-12-22 02:02:41,764 INFO L226 Difference]: Without dead ends: 4879 [2020-12-22 02:02:41,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 02:02:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2020-12-22 02:02:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4877. [2020-12-22 02:02:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2020-12-22 02:02:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 5665 transitions. [2020-12-22 02:02:41,863 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 5665 transitions. Word has length 415 [2020-12-22 02:02:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:41,864 INFO L481 AbstractCegarLoop]: Abstraction has 4877 states and 5665 transitions. [2020-12-22 02:02:41,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 5665 transitions. [2020-12-22 02:02:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-12-22 02:02:41,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:41,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:41,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:02:41,870 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash 337502603, now seen corresponding path program 1 times [2020-12-22 02:02:41,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:41,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499278304] [2020-12-22 02:02:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:02:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499278304] [2020-12-22 02:02:42,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:42,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:42,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764060802] [2020-12-22 02:02:42,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:42,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:42,390 INFO L87 Difference]: Start difference. First operand 4877 states and 5665 transitions. Second operand 3 states. [2020-12-22 02:02:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:45,454 INFO L93 Difference]: Finished difference Result 11259 states and 13334 transitions. [2020-12-22 02:02:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:45,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 426 [2020-12-22 02:02:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:45,481 INFO L225 Difference]: With dead ends: 11259 [2020-12-22 02:02:45,481 INFO L226 Difference]: Without dead ends: 6683 [2020-12-22 02:02:45,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6683 states. [2020-12-22 02:02:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6683 to 6082. [2020-12-22 02:02:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6082 states. [2020-12-22 02:02:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 6988 transitions. [2020-12-22 02:02:45,602 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 6988 transitions. Word has length 426 [2020-12-22 02:02:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:45,603 INFO L481 AbstractCegarLoop]: Abstraction has 6082 states and 6988 transitions. [2020-12-22 02:02:45,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 6988 transitions. [2020-12-22 02:02:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-12-22 02:02:45,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:45,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:45,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:02:45,610 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1276524408, now seen corresponding path program 1 times [2020-12-22 02:02:45,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:45,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358587581] [2020-12-22 02:02:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-22 02:02:46,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358587581] [2020-12-22 02:02:46,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:46,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:46,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291308344] [2020-12-22 02:02:46,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:46,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:46,100 INFO L87 Difference]: Start difference. First operand 6082 states and 6988 transitions. Second operand 3 states. [2020-12-22 02:02:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:49,243 INFO L93 Difference]: Finished difference Result 13657 states and 15963 transitions. [2020-12-22 02:02:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:49,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 440 [2020-12-22 02:02:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:49,257 INFO L225 Difference]: With dead ends: 13657 [2020-12-22 02:02:49,257 INFO L226 Difference]: Without dead ends: 7876 [2020-12-22 02:02:49,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 02:02:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2020-12-22 02:02:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 7278. [2020-12-22 02:02:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7278 states. [2020-12-22 02:02:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 8508 transitions. [2020-12-22 02:02:49,378 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 8508 transitions. Word has length 440 [2020-12-22 02:02:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:49,380 INFO L481 AbstractCegarLoop]: Abstraction has 7278 states and 8508 transitions. [2020-12-22 02:02:49,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 8508 transitions. [2020-12-22 02:02:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-12-22 02:02:49,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:49,387 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:49,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:02:49,388 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1397064048, now seen corresponding path program 1 times [2020-12-22 02:02:49,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:49,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372524561] [2020-12-22 02:02:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-12-22 02:02:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372524561] [2020-12-22 02:02:49,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:49,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:49,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470266766] [2020-12-22 02:02:49,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:49,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:49,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:49,854 INFO L87 Difference]: Start difference. First operand 7278 states and 8508 transitions. Second operand 3 states. [2020-12-22 02:02:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:52,902 INFO L93 Difference]: Finished difference Result 14556 states and 17043 transitions. [2020-12-22 02:02:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:52,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 515 [2020-12-22 02:02:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:52,919 INFO L225 Difference]: With dead ends: 14556 [2020-12-22 02:02:52,919 INFO L226 Difference]: Without dead ends: 7579 [2020-12-22 02:02:52,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2020-12-22 02:02:53,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 7576. [2020-12-22 02:02:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7576 states. [2020-12-22 02:02:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7576 states to 7576 states and 8619 transitions. [2020-12-22 02:02:53,039 INFO L78 Accepts]: Start accepts. Automaton has 7576 states and 8619 transitions. Word has length 515 [2020-12-22 02:02:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:53,041 INFO L481 AbstractCegarLoop]: Abstraction has 7576 states and 8619 transitions. [2020-12-22 02:02:53,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7576 states and 8619 transitions. [2020-12-22 02:02:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-12-22 02:02:53,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:53,109 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:53,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:02:53,113 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2057557162, now seen corresponding path program 1 times [2020-12-22 02:02:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:53,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537640171] [2020-12-22 02:02:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 531 proven. 39 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 02:02:53,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537640171] [2020-12-22 02:02:53,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261509179] [2020-12-22 02:02:53,936 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 02:02:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:02:54,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:02:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2020-12-22 02:02:55,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:02:55,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 02:02:55,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325067320] [2020-12-22 02:02:55,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:55,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:02:55,328 INFO L87 Difference]: Start difference. First operand 7576 states and 8619 transitions. Second operand 3 states. [2020-12-22 02:02:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:58,787 INFO L93 Difference]: Finished difference Result 16943 states and 19522 transitions. [2020-12-22 02:02:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:58,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 547 [2020-12-22 02:02:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:58,805 INFO L225 Difference]: With dead ends: 16943 [2020-12-22 02:02:58,805 INFO L226 Difference]: Without dead ends: 9668 [2020-12-22 02:02:58,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:02:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9668 states. [2020-12-22 02:02:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9668 to 9668. [2020-12-22 02:02:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9668 states. [2020-12-22 02:02:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9668 states to 9668 states and 11027 transitions. [2020-12-22 02:02:59,038 INFO L78 Accepts]: Start accepts. Automaton has 9668 states and 11027 transitions. Word has length 547 [2020-12-22 02:02:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:59,038 INFO L481 AbstractCegarLoop]: Abstraction has 9668 states and 11027 transitions. [2020-12-22 02:02:59,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9668 states and 11027 transitions. [2020-12-22 02:02:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2020-12-22 02:02:59,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:59,046 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:02:59,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 02:02:59,260 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1484596940, now seen corresponding path program 1 times [2020-12-22 02:02:59,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:59,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251614882] [2020-12-22 02:02:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-22 02:02:59,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251614882] [2020-12-22 02:02:59,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:59,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:59,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937742227] [2020-12-22 02:02:59,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:59,752 INFO L87 Difference]: Start difference. First operand 9668 states and 11027 transitions. Second operand 3 states. [2020-12-22 02:03:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:03:03,970 INFO L93 Difference]: Finished difference Result 23534 states and 27046 transitions. [2020-12-22 02:03:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:03:03,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 551 [2020-12-22 02:03:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:03:03,996 INFO L225 Difference]: With dead ends: 23534 [2020-12-22 02:03:03,997 INFO L226 Difference]: Without dead ends: 14167 [2020-12-22 02:03:04,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:03:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14167 states. [2020-12-22 02:03:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14167 to 13857. [2020-12-22 02:03:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13857 states. [2020-12-22 02:03:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13857 states to 13857 states and 15594 transitions. [2020-12-22 02:03:04,214 INFO L78 Accepts]: Start accepts. Automaton has 13857 states and 15594 transitions. Word has length 551 [2020-12-22 02:03:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:03:04,215 INFO L481 AbstractCegarLoop]: Abstraction has 13857 states and 15594 transitions. [2020-12-22 02:03:04,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:03:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 13857 states and 15594 transitions. [2020-12-22 02:03:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-12-22 02:03:04,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:03:04,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:03:04,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:03:04,241 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:03:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:03:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 94161064, now seen corresponding path program 1 times [2020-12-22 02:03:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:03:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591241283] [2020-12-22 02:03:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:03:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 688 proven. 39 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-12-22 02:03:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591241283] [2020-12-22 02:03:05,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393771070] [2020-12-22 02:03:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:03:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:03:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:03:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 615 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2020-12-22 02:03:06,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:03:06,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 02:03:06,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790281300] [2020-12-22 02:03:06,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:03:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:03:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:03:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:03:06,378 INFO L87 Difference]: Start difference. First operand 13857 states and 15594 transitions. Second operand 3 states. [2020-12-22 02:03:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:03:09,941 INFO L93 Difference]: Finished difference Result 27410 states and 30876 transitions. [2020-12-22 02:03:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:03:09,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 626 [2020-12-22 02:03:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:03:09,959 INFO L225 Difference]: With dead ends: 27410 [2020-12-22 02:03:09,959 INFO L226 Difference]: Without dead ends: 13854 [2020-12-22 02:03:09,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:03:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13854 states. [2020-12-22 02:03:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13854 to 13555. [2020-12-22 02:03:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13555 states. [2020-12-22 02:03:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13555 states to 13555 states and 14678 transitions. [2020-12-22 02:03:10,162 INFO L78 Accepts]: Start accepts. Automaton has 13555 states and 14678 transitions. Word has length 626 [2020-12-22 02:03:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:03:10,163 INFO L481 AbstractCegarLoop]: Abstraction has 13555 states and 14678 transitions. [2020-12-22 02:03:10,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:03:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13555 states and 14678 transitions. [2020-12-22 02:03:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2020-12-22 02:03:10,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:03:10,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:03:10,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 02:03:10,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:03:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:03:10,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1632467113, now seen corresponding path program 1 times [2020-12-22 02:03:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:03:10,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037921964] [2020-12-22 02:03:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:03:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 615 proven. 39 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-12-22 02:03:11,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037921964] [2020-12-22 02:03:11,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904549863] [2020-12-22 02:03:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:03:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:03:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:03:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 654 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-12-22 02:03:13,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:03:13,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 02:03:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561882272] [2020-12-22 02:03:13,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:03:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:03:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:03:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:03:13,286 INFO L87 Difference]: Start difference. First operand 13555 states and 14678 transitions. Second operand 4 states. [2020-12-22 02:03:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:03:18,624 INFO L93 Difference]: Finished difference Result 28306 states and 30686 transitions. [2020-12-22 02:03:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:03:18,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 627 [2020-12-22 02:03:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:03:18,677 INFO L225 Difference]: With dead ends: 28306 [2020-12-22 02:03:18,677 INFO L226 Difference]: Without dead ends: 14753 [2020-12-22 02:03:18,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:03:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14753 states. [2020-12-22 02:03:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14753 to 14453. [2020-12-22 02:03:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14453 states. [2020-12-22 02:03:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14453 states to 14453 states and 15621 transitions. [2020-12-22 02:03:18,936 INFO L78 Accepts]: Start accepts. Automaton has 14453 states and 15621 transitions. Word has length 627 [2020-12-22 02:03:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:03:18,937 INFO L481 AbstractCegarLoop]: Abstraction has 14453 states and 15621 transitions. [2020-12-22 02:03:18,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:03:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14453 states and 15621 transitions. [2020-12-22 02:03:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2020-12-22 02:03:18,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:03:18,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:03:19,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 02:03:19,168 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:03:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:03:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1939287860, now seen corresponding path program 1 times [2020-12-22 02:03:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:03:19,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634269180] [2020-12-22 02:03:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:03:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 266 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:03:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634269180] [2020-12-22 02:03:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982564098] [2020-12-22 02:03:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:03:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:03:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:03:21,747 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-22 02:03:21,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:03:21,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:03:21,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:03:21,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:03:21,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:03:21,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:03:21,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:03:21,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:03:21,839 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 02:03:21,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:03:21,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 02:03:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 450 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:03:22,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:03:22,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 02:03:22,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125136811] [2020-12-22 02:03:22,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 02:03:22,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:03:22,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 02:03:22,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:03:22,677 INFO L87 Difference]: Start difference. First operand 14453 states and 15621 transitions. Second operand 9 states. [2020-12-22 02:03:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:03:53,029 INFO L93 Difference]: Finished difference Result 46902 states and 50583 transitions. [2020-12-22 02:03:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 02:03:53,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 664 [2020-12-22 02:03:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:03:53,138 INFO L225 Difference]: With dead ends: 46902 [2020-12-22 02:03:53,138 INFO L226 Difference]: Without dead ends: 32451 [2020-12-22 02:03:53,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2020-12-22 02:03:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32451 states. [2020-12-22 02:03:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32451 to 25529. [2020-12-22 02:03:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25529 states. [2020-12-22 02:03:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25529 states to 25529 states and 27476 transitions. [2020-12-22 02:03:53,866 INFO L78 Accepts]: Start accepts. Automaton has 25529 states and 27476 transitions. Word has length 664 [2020-12-22 02:03:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:03:53,867 INFO L481 AbstractCegarLoop]: Abstraction has 25529 states and 27476 transitions. [2020-12-22 02:03:53,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 02:03:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25529 states and 27476 transitions. [2020-12-22 02:03:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2020-12-22 02:03:53,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:03:53,892 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:03:54,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:03:54,109 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:03:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:03:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1642869698, now seen corresponding path program 1 times [2020-12-22 02:03:54,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:03:54,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234534360] [2020-12-22 02:03:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:03:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:03:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2020-12-22 02:03:55,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234534360] [2020-12-22 02:03:55,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:03:55,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:03:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475803247] [2020-12-22 02:03:55,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:03:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:03:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:03:55,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:03:55,017 INFO L87 Difference]: Start difference. First operand 25529 states and 27476 transitions. Second operand 3 states. [2020-12-22 02:03:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:03:59,648 INFO L93 Difference]: Finished difference Result 51054 states and 54948 transitions. [2020-12-22 02:03:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:03:59,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 731 [2020-12-22 02:03:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:03:59,695 INFO L225 Difference]: With dead ends: 51054 [2020-12-22 02:03:59,695 INFO L226 Difference]: Without dead ends: 25527 [2020-12-22 02:03:59,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:03:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25527 states. [2020-12-22 02:04:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25527 to 25527. [2020-12-22 02:04:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25527 states. [2020-12-22 02:04:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25527 states to 25527 states and 27472 transitions. [2020-12-22 02:04:00,139 INFO L78 Accepts]: Start accepts. Automaton has 25527 states and 27472 transitions. Word has length 731 [2020-12-22 02:04:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:00,140 INFO L481 AbstractCegarLoop]: Abstraction has 25527 states and 27472 transitions. [2020-12-22 02:04:00,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:04:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25527 states and 27472 transitions. [2020-12-22 02:04:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2020-12-22 02:04:00,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:00,177 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:00,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:04:00,178 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1626669109, now seen corresponding path program 1 times [2020-12-22 02:04:00,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:00,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117339114] [2020-12-22 02:04:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 763 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-22 02:04:01,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117339114] [2020-12-22 02:04:01,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:04:01,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:04:01,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872556237] [2020-12-22 02:04:01,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:04:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:04:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:04:01,144 INFO L87 Difference]: Start difference. First operand 25527 states and 27472 transitions. Second operand 3 states. [2020-12-22 02:04:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:04:07,134 INFO L93 Difference]: Finished difference Result 61216 states and 65878 transitions. [2020-12-22 02:04:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:04:07,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 760 [2020-12-22 02:04:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:04:07,191 INFO L225 Difference]: With dead ends: 61216 [2020-12-22 02:04:07,192 INFO L226 Difference]: Without dead ends: 35691 [2020-12-22 02:04:07,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:04:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35691 states. [2020-12-22 02:04:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35691 to 30907. [2020-12-22 02:04:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30907 states. [2020-12-22 02:04:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30907 states to 30907 states and 33166 transitions. [2020-12-22 02:04:07,686 INFO L78 Accepts]: Start accepts. Automaton has 30907 states and 33166 transitions. Word has length 760 [2020-12-22 02:04:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:07,687 INFO L481 AbstractCegarLoop]: Abstraction has 30907 states and 33166 transitions. [2020-12-22 02:04:07,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:04:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30907 states and 33166 transitions. [2020-12-22 02:04:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-12-22 02:04:07,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:07,716 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:07,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:04:07,717 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1621297423, now seen corresponding path program 1 times [2020-12-22 02:04:07,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:07,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146687171] [2020-12-22 02:04:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 735 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-12-22 02:04:09,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146687171] [2020-12-22 02:04:09,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:04:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:04:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323517170] [2020-12-22 02:04:09,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:04:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:04:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:09,220 INFO L87 Difference]: Start difference. First operand 30907 states and 33166 transitions. Second operand 4 states. [2020-12-22 02:04:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:04:17,868 INFO L93 Difference]: Finished difference Result 77112 states and 82660 transitions. [2020-12-22 02:04:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:04:17,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 840 [2020-12-22 02:04:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:04:18,002 INFO L225 Difference]: With dead ends: 77112 [2020-12-22 02:04:18,002 INFO L226 Difference]: Without dead ends: 46207 [2020-12-22 02:04:18,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46207 states. [2020-12-22 02:04:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46207 to 36295. [2020-12-22 02:04:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36295 states. [2020-12-22 02:04:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36295 states to 36295 states and 38923 transitions. [2020-12-22 02:04:18,505 INFO L78 Accepts]: Start accepts. Automaton has 36295 states and 38923 transitions. Word has length 840 [2020-12-22 02:04:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:18,506 INFO L481 AbstractCegarLoop]: Abstraction has 36295 states and 38923 transitions. [2020-12-22 02:04:18,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:04:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36295 states and 38923 transitions. [2020-12-22 02:04:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2020-12-22 02:04:18,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:18,531 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:18,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:04:18,532 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1596869352, now seen corresponding path program 1 times [2020-12-22 02:04:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227572323] [2020-12-22 02:04:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2020-12-22 02:04:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227572323] [2020-12-22 02:04:19,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:04:19,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:04:19,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868486875] [2020-12-22 02:04:19,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:04:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:04:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:04:19,645 INFO L87 Difference]: Start difference. First operand 36295 states and 38923 transitions. Second operand 3 states. [2020-12-22 02:04:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:04:24,898 INFO L93 Difference]: Finished difference Result 79163 states and 84743 transitions. [2020-12-22 02:04:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:04:24,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 858 [2020-12-22 02:04:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:04:24,938 INFO L225 Difference]: With dead ends: 79163 [2020-12-22 02:04:24,938 INFO L226 Difference]: Without dead ends: 33601 [2020-12-22 02:04:24,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:04:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33601 states. [2020-12-22 02:04:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33601 to 27020. [2020-12-22 02:04:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27020 states. [2020-12-22 02:04:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27020 states to 27020 states and 28028 transitions. [2020-12-22 02:04:25,282 INFO L78 Accepts]: Start accepts. Automaton has 27020 states and 28028 transitions. Word has length 858 [2020-12-22 02:04:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:25,283 INFO L481 AbstractCegarLoop]: Abstraction has 27020 states and 28028 transitions. [2020-12-22 02:04:25,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:04:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27020 states and 28028 transitions. [2020-12-22 02:04:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2020-12-22 02:04:25,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:25,300 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:25,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:04:25,300 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -991976836, now seen corresponding path program 1 times [2020-12-22 02:04:25,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:25,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872305973] [2020-12-22 02:04:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 658 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2020-12-22 02:04:26,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872305973] [2020-12-22 02:04:26,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:04:26,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:04:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30364800] [2020-12-22 02:04:26,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:04:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:04:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:26,658 INFO L87 Difference]: Start difference. First operand 27020 states and 28028 transitions. Second operand 4 states. [2020-12-22 02:04:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:04:33,107 INFO L93 Difference]: Finished difference Result 63326 states and 65651 transitions. [2020-12-22 02:04:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:04:33,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 881 [2020-12-22 02:04:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:04:33,144 INFO L225 Difference]: With dead ends: 63326 [2020-12-22 02:04:33,145 INFO L226 Difference]: Without dead ends: 36308 [2020-12-22 02:04:33,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36308 states. [2020-12-22 02:04:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36308 to 28819. [2020-12-22 02:04:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28819 states. [2020-12-22 02:04:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28819 states to 28819 states and 29884 transitions. [2020-12-22 02:04:33,579 INFO L78 Accepts]: Start accepts. Automaton has 28819 states and 29884 transitions. Word has length 881 [2020-12-22 02:04:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:33,580 INFO L481 AbstractCegarLoop]: Abstraction has 28819 states and 29884 transitions. [2020-12-22 02:04:33,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:04:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28819 states and 29884 transitions. [2020-12-22 02:04:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2020-12-22 02:04:33,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:33,597 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:33,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:04:33,597 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1094532106, now seen corresponding path program 1 times [2020-12-22 02:04:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897303323] [2020-12-22 02:04:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 1016 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2020-12-22 02:04:35,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897303323] [2020-12-22 02:04:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:04:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:04:35,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966454133] [2020-12-22 02:04:35,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:04:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:04:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:35,006 INFO L87 Difference]: Start difference. First operand 28819 states and 29884 transitions. Second operand 4 states. [2020-12-22 02:04:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:04:41,013 INFO L93 Difference]: Finished difference Result 60321 states and 62539 transitions. [2020-12-22 02:04:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:04:41,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 887 [2020-12-22 02:04:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:04:41,053 INFO L225 Difference]: With dead ends: 60321 [2020-12-22 02:04:41,053 INFO L226 Difference]: Without dead ends: 31504 [2020-12-22 02:04:41,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:04:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31504 states. [2020-12-22 02:04:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31504 to 29107. [2020-12-22 02:04:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29107 states. [2020-12-22 02:04:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29107 states to 29107 states and 29955 transitions. [2020-12-22 02:04:41,412 INFO L78 Accepts]: Start accepts. Automaton has 29107 states and 29955 transitions. Word has length 887 [2020-12-22 02:04:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:04:41,413 INFO L481 AbstractCegarLoop]: Abstraction has 29107 states and 29955 transitions. [2020-12-22 02:04:41,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:04:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29107 states and 29955 transitions. [2020-12-22 02:04:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2020-12-22 02:04:41,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:04:41,439 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:04:41,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 02:04:41,440 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:04:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:04:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -369515806, now seen corresponding path program 1 times [2020-12-22 02:04:41,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:04:41,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199177811] [2020-12-22 02:04:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:04:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 989 proven. 263 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-22 02:04:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199177811] [2020-12-22 02:04:43,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192187985] [2020-12-22 02:04:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:04:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:04:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:04:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:04:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 1133 proven. 76 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-22 02:04:46,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:04:46,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2020-12-22 02:04:46,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029906035] [2020-12-22 02:04:46,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 02:04:46,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:04:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 02:04:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:04:46,801 INFO L87 Difference]: Start difference. First operand 29107 states and 29955 transitions. Second operand 8 states. [2020-12-22 02:05:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:05:00,623 INFO L93 Difference]: Finished difference Result 62102 states and 63914 transitions. [2020-12-22 02:05:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 02:05:00,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 918 [2020-12-22 02:05:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:05:00,655 INFO L225 Difference]: With dead ends: 62102 [2020-12-22 02:05:00,655 INFO L226 Difference]: Without dead ends: 32997 [2020-12-22 02:05:00,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 924 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 02:05:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32997 states. [2020-12-22 02:05:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32997 to 29105. [2020-12-22 02:05:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29105 states. [2020-12-22 02:05:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29105 states to 29105 states and 29912 transitions. [2020-12-22 02:05:00,991 INFO L78 Accepts]: Start accepts. Automaton has 29105 states and 29912 transitions. Word has length 918 [2020-12-22 02:05:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:05:00,991 INFO L481 AbstractCegarLoop]: Abstraction has 29105 states and 29912 transitions. [2020-12-22 02:05:00,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 02:05:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 29105 states and 29912 transitions. [2020-12-22 02:05:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2020-12-22 02:05:01,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:05:01,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:05:01,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 02:05:01,229 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:05:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:05:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash -508670603, now seen corresponding path program 1 times [2020-12-22 02:05:01,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:05:01,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191028701] [2020-12-22 02:05:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:05:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:05:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 1152 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2020-12-22 02:05:02,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191028701] [2020-12-22 02:05:02,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:05:02,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:05:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34966048] [2020-12-22 02:05:02,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:05:02,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:05:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:05:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:05:02,533 INFO L87 Difference]: Start difference. First operand 29105 states and 29912 transitions. Second operand 4 states. [2020-12-22 02:05:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:05:08,434 INFO L93 Difference]: Finished difference Result 64193 states and 65955 transitions. [2020-12-22 02:05:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:05:08,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 919 [2020-12-22 02:05:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:05:08,476 INFO L225 Difference]: With dead ends: 64193 [2020-12-22 02:05:08,476 INFO L226 Difference]: Without dead ends: 35090 [2020-12-22 02:05:08,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:05:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35090 states. [2020-12-22 02:05:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35090 to 30300. [2020-12-22 02:05:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30300 states. [2020-12-22 02:05:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30300 states to 30300 states and 31094 transitions. [2020-12-22 02:05:08,802 INFO L78 Accepts]: Start accepts. Automaton has 30300 states and 31094 transitions. Word has length 919 [2020-12-22 02:05:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:05:08,802 INFO L481 AbstractCegarLoop]: Abstraction has 30300 states and 31094 transitions. [2020-12-22 02:05:08,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:05:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30300 states and 31094 transitions. [2020-12-22 02:05:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2020-12-22 02:05:08,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:05:08,820 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:05:08,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 02:05:08,821 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:05:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:05:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash 353674574, now seen corresponding path program 1 times [2020-12-22 02:05:08,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:05:08,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206887458] [2020-12-22 02:05:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:05:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:05:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 983 proven. 350 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-12-22 02:05:11,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206887458] [2020-12-22 02:05:11,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278644651] [2020-12-22 02:05:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:05:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:05:11,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 02:05:11,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:05:13,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:05:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 921 proven. 206 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-12-22 02:05:14,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:05:14,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 02:05:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124437043] [2020-12-22 02:05:14,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 02:05:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:05:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 02:05:14,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:05:14,841 INFO L87 Difference]: Start difference. First operand 30300 states and 31094 transitions. Second operand 9 states. [2020-12-22 02:05:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:05:42,096 INFO L93 Difference]: Finished difference Result 71446 states and 73263 transitions. [2020-12-22 02:05:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 02:05:42,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 924 [2020-12-22 02:05:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:05:42,140 INFO L225 Difference]: With dead ends: 71446 [2020-12-22 02:05:42,140 INFO L226 Difference]: Without dead ends: 40544 [2020-12-22 02:05:42,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-12-22 02:05:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40544 states. [2020-12-22 02:05:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40544 to 34790. [2020-12-22 02:05:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34790 states. [2020-12-22 02:05:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34790 states to 34790 states and 35623 transitions. [2020-12-22 02:05:42,587 INFO L78 Accepts]: Start accepts. Automaton has 34790 states and 35623 transitions. Word has length 924 [2020-12-22 02:05:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:05:42,587 INFO L481 AbstractCegarLoop]: Abstraction has 34790 states and 35623 transitions. [2020-12-22 02:05:42,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 02:05:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34790 states and 35623 transitions. [2020-12-22 02:05:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2020-12-22 02:05:42,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:05:42,605 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:05:42,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:05:42,819 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:05:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:05:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 117022124, now seen corresponding path program 1 times [2020-12-22 02:05:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:05:42,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027928733] [2020-12-22 02:05:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:05:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:05:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2020-12-22 02:05:44,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027928733] [2020-12-22 02:05:44,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:05:44,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:05:44,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853561220] [2020-12-22 02:05:44,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:05:44,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:05:44,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:05:44,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:05:44,016 INFO L87 Difference]: Start difference. First operand 34790 states and 35623 transitions. Second operand 4 states.