/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:55:22,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:55:22,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:55:22,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:55:22,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:55:22,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:55:22,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:55:22,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:55:22,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:55:22,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:55:22,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:55:22,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:55:22,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:55:22,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:55:22,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:55:22,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:55:22,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:55:22,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:55:22,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:55:22,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:55:22,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:55:22,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:55:22,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:55:22,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:55:22,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:55:22,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:55:22,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:55:22,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:55:22,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:55:22,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:55:22,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:55:22,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:55:22,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:55:22,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:55:22,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:55:22,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:55:22,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:55:22,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:55:22,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:55:22,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:55:22,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:55:22,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:55:22,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:55:22,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:55:22,222 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:55:22,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:55:22,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:55:22,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:55:22,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:55:22,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:55:22,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:55:22,223 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:55:22,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:55:22,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:55:22,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:55:22,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:55:22,518 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:55:22,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-07-17 17:55:22,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61db8d5fc/6f2cd8cb3949480a920f8ad0c6796e6b/FLAGad885960d [2020-07-17 17:55:23,222 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:55:23,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-07-17 17:55:23,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61db8d5fc/6f2cd8cb3949480a920f8ad0c6796e6b/FLAGad885960d [2020-07-17 17:55:23,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61db8d5fc/6f2cd8cb3949480a920f8ad0c6796e6b [2020-07-17 17:55:23,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:55:23,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:55:23,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:55:23,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:55:23,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:55:23,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:55:23" (1/1) ... [2020-07-17 17:55:23,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263050f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:23, skipping insertion in model container [2020-07-17 17:55:23,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:55:23" (1/1) ... [2020-07-17 17:55:23,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:55:23,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:55:24,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:55:24,266 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:55:24,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:55:24,526 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:55:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24 WrapperNode [2020-07-17 17:55:24,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:55:24,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:55:24,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:55:24,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:55:24,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (1/1) ... [2020-07-17 17:55:24,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:55:24,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:55:24,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:55:24,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:55:24,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (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 [2020-07-17 17:55:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:55:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:55:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-17 17:55:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:55:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-17 17:55:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:55:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:55:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 17:55:24,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:55:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:55:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:55:27,087 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:55:27,087 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 17:55:27,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:55:27 BoogieIcfgContainer [2020-07-17 17:55:27,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:55:27,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:55:27,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:55:27,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:55:27,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:55:23" (1/3) ... [2020-07-17 17:55:27,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e7cc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:55:27, skipping insertion in model container [2020-07-17 17:55:27,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:55:24" (2/3) ... [2020-07-17 17:55:27,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e7cc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:55:27, skipping insertion in model container [2020-07-17 17:55:27,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:55:27" (3/3) ... [2020-07-17 17:55:27,108 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-07-17 17:55:27,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:55:27,129 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:55:27,144 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:55:27,166 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:55:27,167 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:55:27,167 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:55:27,167 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:55:27,167 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:55:27,167 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:55:27,168 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:55:27,168 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:55:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-07-17 17:55:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 17:55:27,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:27,215 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] [2020-07-17 17:55:27,216 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-07-17 17:55:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:27,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104033113] [2020-07-17 17:55:27,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:55:27,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104033113] [2020-07-17 17:55:27,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:55:27,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 17:55:27,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194643496] [2020-07-17 17:55:27,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 17:55:27,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 17:55:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:55:27,610 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 4 states. [2020-07-17 17:55:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:31,320 INFO L93 Difference]: Finished difference Result 1957 states and 2552 transitions. [2020-07-17 17:55:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:55:31,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-07-17 17:55:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:31,350 INFO L225 Difference]: With dead ends: 1957 [2020-07-17 17:55:31,350 INFO L226 Difference]: Without dead ends: 1087 [2020-07-17 17:55:31,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:55:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-07-17 17:55:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1039. [2020-07-17 17:55:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2020-07-17 17:55:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1227 transitions. [2020-07-17 17:55:31,538 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1227 transitions. Word has length 55 [2020-07-17 17:55:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:31,539 INFO L479 AbstractCegarLoop]: Abstraction has 1039 states and 1227 transitions. [2020-07-17 17:55:31,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 17:55:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1227 transitions. [2020-07-17 17:55:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-17 17:55:31,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:31,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:55:31,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:55:31,547 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash 497365935, now seen corresponding path program 1 times [2020-07-17 17:55:31,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:31,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226103198] [2020-07-17 17:55:31,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:55:31,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226103198] [2020-07-17 17:55:31,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:55:31,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 17:55:31,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802903141] [2020-07-17 17:55:31,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:55:31,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:55:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:55:31,845 INFO L87 Difference]: Start difference. First operand 1039 states and 1227 transitions. Second operand 8 states. [2020-07-17 17:55:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:37,287 INFO L93 Difference]: Finished difference Result 3254 states and 4032 transitions. [2020-07-17 17:55:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 17:55:37,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 137 [2020-07-17 17:55:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:37,308 INFO L225 Difference]: With dead ends: 3254 [2020-07-17 17:55:37,309 INFO L226 Difference]: Without dead ends: 2232 [2020-07-17 17:55:37,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:55:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-07-17 17:55:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1840. [2020-07-17 17:55:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1840 states. [2020-07-17 17:55:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2317 transitions. [2020-07-17 17:55:37,552 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2317 transitions. Word has length 137 [2020-07-17 17:55:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:37,555 INFO L479 AbstractCegarLoop]: Abstraction has 1840 states and 2317 transitions. [2020-07-17 17:55:37,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:55:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2317 transitions. [2020-07-17 17:55:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-17 17:55:37,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:37,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:55:37,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:55:37,572 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1086264008, now seen corresponding path program 1 times [2020-07-17 17:55:37,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:37,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143620892] [2020-07-17 17:55:37,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:55:37,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143620892] [2020-07-17 17:55:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:55:37,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 17:55:37,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247534703] [2020-07-17 17:55:37,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:55:37,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:37,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:55:37,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:55:37,905 INFO L87 Difference]: Start difference. First operand 1840 states and 2317 transitions. Second operand 7 states. [2020-07-17 17:55:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:42,435 INFO L93 Difference]: Finished difference Result 4802 states and 6283 transitions. [2020-07-17 17:55:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:55:42,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-07-17 17:55:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:42,468 INFO L225 Difference]: With dead ends: 4802 [2020-07-17 17:55:42,469 INFO L226 Difference]: Without dead ends: 2979 [2020-07-17 17:55:42,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:55:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2020-07-17 17:55:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2916. [2020-07-17 17:55:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2916 states. [2020-07-17 17:55:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3640 transitions. [2020-07-17 17:55:42,820 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3640 transitions. Word has length 144 [2020-07-17 17:55:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:42,820 INFO L479 AbstractCegarLoop]: Abstraction has 2916 states and 3640 transitions. [2020-07-17 17:55:42,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:55:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3640 transitions. [2020-07-17 17:55:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-17 17:55:42,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:42,826 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:55:42,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:55:42,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1034486148, now seen corresponding path program 1 times [2020-07-17 17:55:42,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:42,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446365232] [2020-07-17 17:55:42,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 17:55:43,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446365232] [2020-07-17 17:55:43,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:55:43,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:55:43,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247155817] [2020-07-17 17:55:43,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:55:43,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:55:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:55:43,178 INFO L87 Difference]: Start difference. First operand 2916 states and 3640 transitions. Second operand 8 states. [2020-07-17 17:55:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:47,361 INFO L93 Difference]: Finished difference Result 5484 states and 6947 transitions. [2020-07-17 17:55:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:55:47,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 220 [2020-07-17 17:55:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:47,389 INFO L225 Difference]: With dead ends: 5484 [2020-07-17 17:55:47,389 INFO L226 Difference]: Without dead ends: 2979 [2020-07-17 17:55:47,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:55:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2020-07-17 17:55:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2922. [2020-07-17 17:55:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2922 states. [2020-07-17 17:55:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 3630 transitions. [2020-07-17 17:55:47,683 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 3630 transitions. Word has length 220 [2020-07-17 17:55:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:47,685 INFO L479 AbstractCegarLoop]: Abstraction has 2922 states and 3630 transitions. [2020-07-17 17:55:47,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:55:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 3630 transitions. [2020-07-17 17:55:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-17 17:55:47,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:47,692 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:55:47,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:55:47,693 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1151458182, now seen corresponding path program 1 times [2020-07-17 17:55:47,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:47,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347796953] [2020-07-17 17:55:47,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 116 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 17:55:48,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347796953] [2020-07-17 17:55:48,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:55:48,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:55:48,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238308546] [2020-07-17 17:55:48,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:55:48,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:48,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:55:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:55:48,286 INFO L87 Difference]: Start difference. First operand 2922 states and 3630 transitions. Second operand 6 states. [2020-07-17 17:55:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:52,502 INFO L93 Difference]: Finished difference Result 7372 states and 9611 transitions. [2020-07-17 17:55:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:55:52,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 269 [2020-07-17 17:55:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:52,546 INFO L225 Difference]: With dead ends: 7372 [2020-07-17 17:55:52,547 INFO L226 Difference]: Without dead ends: 4861 [2020-07-17 17:55:52,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:55:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2020-07-17 17:55:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4192. [2020-07-17 17:55:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4192 states. [2020-07-17 17:55:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 5392 transitions. [2020-07-17 17:55:53,165 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 5392 transitions. Word has length 269 [2020-07-17 17:55:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:53,166 INFO L479 AbstractCegarLoop]: Abstraction has 4192 states and 5392 transitions. [2020-07-17 17:55:53,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:55:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 5392 transitions. [2020-07-17 17:55:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-07-17 17:55:53,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:53,173 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:55:53,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:55:53,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429082, now seen corresponding path program 1 times [2020-07-17 17:55:53,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:53,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923945773] [2020-07-17 17:55:53,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-17 17:55:53,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923945773] [2020-07-17 17:55:53,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:55:53,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 17:55:53,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131399118] [2020-07-17 17:55:53,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:55:53,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:53,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:55:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:55:53,528 INFO L87 Difference]: Start difference. First operand 4192 states and 5392 transitions. Second operand 5 states. [2020-07-17 17:55:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:55:56,844 INFO L93 Difference]: Finished difference Result 9691 states and 12817 transitions. [2020-07-17 17:55:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:55:56,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2020-07-17 17:55:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:55:56,895 INFO L225 Difference]: With dead ends: 9691 [2020-07-17 17:55:56,895 INFO L226 Difference]: Without dead ends: 5910 [2020-07-17 17:55:56,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:55:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2020-07-17 17:55:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 5249. [2020-07-17 17:55:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5249 states. [2020-07-17 17:55:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 6865 transitions. [2020-07-17 17:55:57,552 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 6865 transitions. Word has length 277 [2020-07-17 17:55:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:55:57,553 INFO L479 AbstractCegarLoop]: Abstraction has 5249 states and 6865 transitions. [2020-07-17 17:55:57,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:55:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 6865 transitions. [2020-07-17 17:55:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-07-17 17:55:57,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:55:57,568 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:55:57,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:55:57,570 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:55:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:55:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash -93697981, now seen corresponding path program 1 times [2020-07-17 17:55:57,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:55:57,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176330024] [2020-07-17 17:55:57,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:55:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:55:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-17 17:55:57,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176330024] [2020-07-17 17:55:57,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:55:57,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:55:57,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162330606] [2020-07-17 17:55:57,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:55:57,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:55:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:55:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:55:57,953 INFO L87 Difference]: Start difference. First operand 5249 states and 6865 transitions. Second operand 9 states. [2020-07-17 17:56:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:05,033 INFO L93 Difference]: Finished difference Result 13956 states and 19494 transitions. [2020-07-17 17:56:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 17:56:05,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 279 [2020-07-17 17:56:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:05,103 INFO L225 Difference]: With dead ends: 13956 [2020-07-17 17:56:05,103 INFO L226 Difference]: Without dead ends: 9118 [2020-07-17 17:56:05,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:56:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2020-07-17 17:56:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 8824. [2020-07-17 17:56:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8824 states. [2020-07-17 17:56:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 12382 transitions. [2020-07-17 17:56:05,905 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 12382 transitions. Word has length 279 [2020-07-17 17:56:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:05,906 INFO L479 AbstractCegarLoop]: Abstraction has 8824 states and 12382 transitions. [2020-07-17 17:56:05,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:56:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 12382 transitions. [2020-07-17 17:56:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-07-17 17:56:05,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:05,915 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:56:05,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:56:05,916 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1780607293, now seen corresponding path program 1 times [2020-07-17 17:56:05,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:05,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454806150] [2020-07-17 17:56:05,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 150 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:56:06,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454806150] [2020-07-17 17:56:06,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:06,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:56:06,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504931946] [2020-07-17 17:56:06,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:56:06,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:56:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:56:06,237 INFO L87 Difference]: Start difference. First operand 8824 states and 12382 transitions. Second operand 9 states. [2020-07-17 17:56:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:16,024 INFO L93 Difference]: Finished difference Result 28564 states and 42783 transitions. [2020-07-17 17:56:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:56:16,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-07-17 17:56:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:16,158 INFO L225 Difference]: With dead ends: 28564 [2020-07-17 17:56:16,159 INFO L226 Difference]: Without dead ends: 20151 [2020-07-17 17:56:16,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:56:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2020-07-17 17:56:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 19853. [2020-07-17 17:56:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19853 states. [2020-07-17 17:56:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 27743 transitions. [2020-07-17 17:56:17,903 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 27743 transitions. Word has length 285 [2020-07-17 17:56:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:17,904 INFO L479 AbstractCegarLoop]: Abstraction has 19853 states and 27743 transitions. [2020-07-17 17:56:17,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:56:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 27743 transitions. [2020-07-17 17:56:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-07-17 17:56:17,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:17,916 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:56:17,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:56:17,917 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1312144757, now seen corresponding path program 1 times [2020-07-17 17:56:17,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:17,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479870440] [2020-07-17 17:56:17,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-17 17:56:18,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479870440] [2020-07-17 17:56:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 17:56:18,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24472918] [2020-07-17 17:56:18,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:56:18,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:56:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:56:18,396 INFO L87 Difference]: Start difference. First operand 19853 states and 27743 transitions. Second operand 5 states. [2020-07-17 17:56:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:22,990 INFO L93 Difference]: Finished difference Result 44576 states and 63164 transitions. [2020-07-17 17:56:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:56:22,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-07-17 17:56:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:23,143 INFO L225 Difference]: With dead ends: 44576 [2020-07-17 17:56:23,144 INFO L226 Difference]: Without dead ends: 25134 [2020-07-17 17:56:23,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:56:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25134 states. [2020-07-17 17:56:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25134 to 24271. [2020-07-17 17:56:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24271 states. [2020-07-17 17:56:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24271 states to 24271 states and 33794 transitions. [2020-07-17 17:56:25,548 INFO L78 Accepts]: Start accepts. Automaton has 24271 states and 33794 transitions. Word has length 301 [2020-07-17 17:56:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:25,549 INFO L479 AbstractCegarLoop]: Abstraction has 24271 states and 33794 transitions. [2020-07-17 17:56:25,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:56:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 24271 states and 33794 transitions. [2020-07-17 17:56:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-17 17:56:25,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:25,561 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:56:25,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:56:25,561 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1665784485, now seen corresponding path program 1 times [2020-07-17 17:56:25,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:25,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891414190] [2020-07-17 17:56:25,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:56:25,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891414190] [2020-07-17 17:56:25,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:25,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:56:25,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856525080] [2020-07-17 17:56:25,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:56:25,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:56:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:56:25,885 INFO L87 Difference]: Start difference. First operand 24271 states and 33794 transitions. Second operand 7 states. [2020-07-17 17:56:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:32,396 INFO L93 Difference]: Finished difference Result 52077 states and 72866 transitions. [2020-07-17 17:56:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:56:32,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 312 [2020-07-17 17:56:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:32,521 INFO L225 Difference]: With dead ends: 52077 [2020-07-17 17:56:32,521 INFO L226 Difference]: Without dead ends: 28217 [2020-07-17 17:56:32,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:56:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28217 states. [2020-07-17 17:56:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28217 to 27917. [2020-07-17 17:56:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27917 states. [2020-07-17 17:56:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27917 states to 27917 states and 37781 transitions. [2020-07-17 17:56:34,821 INFO L78 Accepts]: Start accepts. Automaton has 27917 states and 37781 transitions. Word has length 312 [2020-07-17 17:56:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:34,821 INFO L479 AbstractCegarLoop]: Abstraction has 27917 states and 37781 transitions. [2020-07-17 17:56:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:56:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 27917 states and 37781 transitions. [2020-07-17 17:56:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-17 17:56:34,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:34,834 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-17 17:56:34,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:56:34,834 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 33622082, now seen corresponding path program 1 times [2020-07-17 17:56:34,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:34,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292417592] [2020-07-17 17:56:34,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 17:56:35,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292417592] [2020-07-17 17:56:35,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:35,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:56:35,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085017927] [2020-07-17 17:56:35,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:56:35,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:56:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:56:35,158 INFO L87 Difference]: Start difference. First operand 27917 states and 37781 transitions. Second operand 6 states. [2020-07-17 17:56:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:43,272 INFO L93 Difference]: Finished difference Result 63294 states and 86624 transitions. [2020-07-17 17:56:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:56:43,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 338 [2020-07-17 17:56:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:43,428 INFO L225 Difference]: With dead ends: 63294 [2020-07-17 17:56:43,428 INFO L226 Difference]: Without dead ends: 35788 [2020-07-17 17:56:43,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:56:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35788 states. [2020-07-17 17:56:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35788 to 34715. [2020-07-17 17:56:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34715 states. [2020-07-17 17:56:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34715 states to 34715 states and 46818 transitions. [2020-07-17 17:56:46,214 INFO L78 Accepts]: Start accepts. Automaton has 34715 states and 46818 transitions. Word has length 338 [2020-07-17 17:56:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:46,215 INFO L479 AbstractCegarLoop]: Abstraction has 34715 states and 46818 transitions. [2020-07-17 17:56:46,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:56:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 34715 states and 46818 transitions. [2020-07-17 17:56:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-07-17 17:56:46,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:46,238 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-17 17:56:46,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:56:46,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -32484685, now seen corresponding path program 1 times [2020-07-17 17:56:46,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:46,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745175895] [2020-07-17 17:56:46,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 303 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 17:56:46,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745175895] [2020-07-17 17:56:46,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:46,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:56:46,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160902339] [2020-07-17 17:56:46,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:56:46,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:56:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:56:46,675 INFO L87 Difference]: Start difference. First operand 34715 states and 46818 transitions. Second operand 7 states. [2020-07-17 17:56:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:56:52,767 INFO L93 Difference]: Finished difference Result 62156 states and 85078 transitions. [2020-07-17 17:56:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:56:52,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 397 [2020-07-17 17:56:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:56:52,906 INFO L225 Difference]: With dead ends: 62156 [2020-07-17 17:56:52,906 INFO L226 Difference]: Without dead ends: 27852 [2020-07-17 17:56:53,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:56:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27852 states. [2020-07-17 17:56:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27852 to 27197. [2020-07-17 17:56:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27197 states. [2020-07-17 17:56:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 34263 transitions. [2020-07-17 17:56:55,155 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 34263 transitions. Word has length 397 [2020-07-17 17:56:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:56:55,156 INFO L479 AbstractCegarLoop]: Abstraction has 27197 states and 34263 transitions. [2020-07-17 17:56:55,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:56:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 34263 transitions. [2020-07-17 17:56:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2020-07-17 17:56:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:56:55,203 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:56:55,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:56:55,204 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:56:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:56:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -745953394, now seen corresponding path program 1 times [2020-07-17 17:56:55,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:56:55,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293374501] [2020-07-17 17:56:55,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:56:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:56:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 377 proven. 189 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-07-17 17:56:56,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293374501] [2020-07-17 17:56:56,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:56:56,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:56:56,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271289099] [2020-07-17 17:56:56,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:56:56,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:56:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:56:56,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:56:56,089 INFO L87 Difference]: Start difference. First operand 27197 states and 34263 transitions. Second operand 10 states. [2020-07-17 17:57:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:08,379 INFO L93 Difference]: Finished difference Result 59764 states and 75233 transitions. [2020-07-17 17:57:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:57:08,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 520 [2020-07-17 17:57:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:08,531 INFO L225 Difference]: With dead ends: 59764 [2020-07-17 17:57:08,532 INFO L226 Difference]: Without dead ends: 32978 [2020-07-17 17:57:08,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:57:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32978 states. [2020-07-17 17:57:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32978 to 32831. [2020-07-17 17:57:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32831 states. [2020-07-17 17:57:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32831 states to 32831 states and 40803 transitions. [2020-07-17 17:57:11,109 INFO L78 Accepts]: Start accepts. Automaton has 32831 states and 40803 transitions. Word has length 520 [2020-07-17 17:57:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:11,110 INFO L479 AbstractCegarLoop]: Abstraction has 32831 states and 40803 transitions. [2020-07-17 17:57:11,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:57:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32831 states and 40803 transitions. [2020-07-17 17:57:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-17 17:57:11,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:11,148 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-07-17 17:57:11,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:57:11,148 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1473222243, now seen corresponding path program 1 times [2020-07-17 17:57:11,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:11,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984727758] [2020-07-17 17:57:11,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 178 proven. 389 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-07-17 17:57:11,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984727758] [2020-07-17 17:57:11,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:11,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:57:11,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74150765] [2020-07-17 17:57:11,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:57:11,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:57:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:57:11,932 INFO L87 Difference]: Start difference. First operand 32831 states and 40803 transitions. Second operand 9 states. [2020-07-17 17:57:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:23,660 INFO L93 Difference]: Finished difference Result 67675 states and 84194 transitions. [2020-07-17 17:57:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 17:57:23,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 534 [2020-07-17 17:57:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:23,767 INFO L225 Difference]: With dead ends: 67675 [2020-07-17 17:57:23,768 INFO L226 Difference]: Without dead ends: 35255 [2020-07-17 17:57:23,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:57:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35255 states. [2020-07-17 17:57:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35255 to 34904. [2020-07-17 17:57:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34904 states. [2020-07-17 17:57:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34904 states to 34904 states and 43147 transitions. [2020-07-17 17:57:26,931 INFO L78 Accepts]: Start accepts. Automaton has 34904 states and 43147 transitions. Word has length 534 [2020-07-17 17:57:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:26,931 INFO L479 AbstractCegarLoop]: Abstraction has 34904 states and 43147 transitions. [2020-07-17 17:57:26,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:57:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 34904 states and 43147 transitions. [2020-07-17 17:57:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-07-17 17:57:26,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:26,979 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:26,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:57:26,979 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1332091315, now seen corresponding path program 1 times [2020-07-17 17:57:26,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:26,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278618337] [2020-07-17 17:57:26,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 381 proven. 99 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-07-17 17:57:27,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278618337] [2020-07-17 17:57:27,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:27,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:57:27,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677996558] [2020-07-17 17:57:27,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:57:27,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:57:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:57:27,696 INFO L87 Difference]: Start difference. First operand 34904 states and 43147 transitions. Second operand 7 states. [2020-07-17 17:57:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:37,040 INFO L93 Difference]: Finished difference Result 75185 states and 93199 transitions. [2020-07-17 17:57:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:57:37,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 549 [2020-07-17 17:57:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:37,176 INFO L225 Difference]: With dead ends: 75185 [2020-07-17 17:57:37,177 INFO L226 Difference]: Without dead ends: 40692 [2020-07-17 17:57:37,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:57:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40692 states. [2020-07-17 17:57:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40692 to 36830. [2020-07-17 17:57:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36830 states. [2020-07-17 17:57:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36830 states to 36830 states and 45412 transitions. [2020-07-17 17:57:40,701 INFO L78 Accepts]: Start accepts. Automaton has 36830 states and 45412 transitions. Word has length 549 [2020-07-17 17:57:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:40,702 INFO L479 AbstractCegarLoop]: Abstraction has 36830 states and 45412 transitions. [2020-07-17 17:57:40,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:57:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 36830 states and 45412 transitions. [2020-07-17 17:57:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2020-07-17 17:57:40,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:40,742 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-07-17 17:57:40,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:57:40,743 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:40,743 INFO L82 PathProgramCache]: Analyzing trace with hash -750949808, now seen corresponding path program 1 times [2020-07-17 17:57:40,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:40,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691646106] [2020-07-17 17:57:40,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 603 proven. 6 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2020-07-17 17:57:41,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691646106] [2020-07-17 17:57:41,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:41,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:57:41,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143763415] [2020-07-17 17:57:41,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:57:41,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:57:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:57:41,379 INFO L87 Difference]: Start difference. First operand 36830 states and 45412 transitions. Second operand 10 states. [2020-07-17 17:57:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:57:51,420 INFO L93 Difference]: Finished difference Result 80553 states and 99524 transitions. [2020-07-17 17:57:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 17:57:51,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 576 [2020-07-17 17:57:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:57:51,553 INFO L225 Difference]: With dead ends: 80553 [2020-07-17 17:57:51,553 INFO L226 Difference]: Without dead ends: 44134 [2020-07-17 17:57:51,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:57:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44134 states. [2020-07-17 17:57:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44134 to 42427. [2020-07-17 17:57:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42427 states. [2020-07-17 17:57:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42427 states to 42427 states and 52274 transitions. [2020-07-17 17:57:57,716 INFO L78 Accepts]: Start accepts. Automaton has 42427 states and 52274 transitions. Word has length 576 [2020-07-17 17:57:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:57:57,717 INFO L479 AbstractCegarLoop]: Abstraction has 42427 states and 52274 transitions. [2020-07-17 17:57:57,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:57:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 42427 states and 52274 transitions. [2020-07-17 17:57:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-07-17 17:57:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:57:57,767 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:57:57,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:57:57,768 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:57:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:57:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1575497387, now seen corresponding path program 1 times [2020-07-17 17:57:57,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:57:57,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106963128] [2020-07-17 17:57:57,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:57:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:57:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 173 proven. 8 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-07-17 17:57:58,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106963128] [2020-07-17 17:57:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:57:58,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 17:57:58,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291679412] [2020-07-17 17:57:58,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:57:58,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:57:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:57:58,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:57:58,449 INFO L87 Difference]: Start difference. First operand 42427 states and 52274 transitions. Second operand 5 states. [2020-07-17 17:58:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:05,128 INFO L93 Difference]: Finished difference Result 84460 states and 104125 transitions. [2020-07-17 17:58:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:58:05,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 606 [2020-07-17 17:58:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:05,260 INFO L225 Difference]: With dead ends: 84460 [2020-07-17 17:58:05,260 INFO L226 Difference]: Without dead ends: 42444 [2020-07-17 17:58:05,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:58:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42444 states. [2020-07-17 17:58:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42444 to 42404. [2020-07-17 17:58:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42404 states. [2020-07-17 17:58:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42404 states to 42404 states and 52204 transitions. [2020-07-17 17:58:09,084 INFO L78 Accepts]: Start accepts. Automaton has 42404 states and 52204 transitions. Word has length 606 [2020-07-17 17:58:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:09,085 INFO L479 AbstractCegarLoop]: Abstraction has 42404 states and 52204 transitions. [2020-07-17 17:58:09,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:58:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42404 states and 52204 transitions. [2020-07-17 17:58:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-07-17 17:58:09,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:09,140 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-07-17 17:58:09,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:58:09,141 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 565533557, now seen corresponding path program 1 times [2020-07-17 17:58:09,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:09,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253534869] [2020-07-17 17:58:09,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 523 proven. 99 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2020-07-17 17:58:09,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253534869] [2020-07-17 17:58:09,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:09,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:58:09,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016774322] [2020-07-17 17:58:09,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:58:09,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:58:09,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:58:09,869 INFO L87 Difference]: Start difference. First operand 42404 states and 52204 transitions. Second operand 7 states. [2020-07-17 17:58:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:20,369 INFO L93 Difference]: Finished difference Result 85003 states and 104748 transitions. [2020-07-17 17:58:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:58:20,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-07-17 17:58:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:20,503 INFO L225 Difference]: With dead ends: 85003 [2020-07-17 17:58:20,503 INFO L226 Difference]: Without dead ends: 43010 [2020-07-17 17:58:20,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:58:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43010 states. [2020-07-17 17:58:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43010 to 39777. [2020-07-17 17:58:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39777 states. [2020-07-17 17:58:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39777 states to 39777 states and 47950 transitions. [2020-07-17 17:58:24,181 INFO L78 Accepts]: Start accepts. Automaton has 39777 states and 47950 transitions. Word has length 642 [2020-07-17 17:58:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:24,182 INFO L479 AbstractCegarLoop]: Abstraction has 39777 states and 47950 transitions. [2020-07-17 17:58:24,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:58:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 39777 states and 47950 transitions. [2020-07-17 17:58:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2020-07-17 17:58:24,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:24,231 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-07-17 17:58:24,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 17:58:24,231 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash -26099961, now seen corresponding path program 1 times [2020-07-17 17:58:24,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:24,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106320716] [2020-07-17 17:58:24,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 248 proven. 558 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-17 17:58:25,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106320716] [2020-07-17 17:58:25,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:25,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:58:25,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719173156] [2020-07-17 17:58:25,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:58:25,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:58:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:58:25,179 INFO L87 Difference]: Start difference. First operand 39777 states and 47950 transitions. Second operand 9 states. [2020-07-17 17:58:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:58:42,084 INFO L93 Difference]: Finished difference Result 102078 states and 123149 transitions. [2020-07-17 17:58:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:58:42,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 658 [2020-07-17 17:58:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:58:42,273 INFO L225 Difference]: With dead ends: 102078 [2020-07-17 17:58:42,273 INFO L226 Difference]: Without dead ends: 60011 [2020-07-17 17:58:42,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:58:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60011 states. [2020-07-17 17:58:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60011 to 59073. [2020-07-17 17:58:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59073 states. [2020-07-17 17:58:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59073 states to 59073 states and 70337 transitions. [2020-07-17 17:58:47,657 INFO L78 Accepts]: Start accepts. Automaton has 59073 states and 70337 transitions. Word has length 658 [2020-07-17 17:58:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:58:47,657 INFO L479 AbstractCegarLoop]: Abstraction has 59073 states and 70337 transitions. [2020-07-17 17:58:47,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:58:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 59073 states and 70337 transitions. [2020-07-17 17:58:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2020-07-17 17:58:47,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:58:47,731 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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] [2020-07-17 17:58:47,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 17:58:47,731 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:58:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:58:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1298374939, now seen corresponding path program 1 times [2020-07-17 17:58:47,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:58:47,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171126797] [2020-07-17 17:58:47,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:58:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:58:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 538 proven. 99 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-07-17 17:58:48,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171126797] [2020-07-17 17:58:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:58:48,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:58:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702833741] [2020-07-17 17:58:48,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:58:48,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:58:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:58:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:58:48,740 INFO L87 Difference]: Start difference. First operand 59073 states and 70337 transitions. Second operand 7 states. [2020-07-17 17:59:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:59:02,011 INFO L93 Difference]: Finished difference Result 117118 states and 139351 transitions. [2020-07-17 17:59:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:59:02,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 687 [2020-07-17 17:59:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:59:02,203 INFO L225 Difference]: With dead ends: 117118 [2020-07-17 17:59:02,203 INFO L226 Difference]: Without dead ends: 58257 [2020-07-17 17:59:02,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:59:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58257 states. [2020-07-17 17:59:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58257 to 57023. [2020-07-17 17:59:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57023 states. [2020-07-17 17:59:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57023 states to 57023 states and 66286 transitions. [2020-07-17 17:59:07,717 INFO L78 Accepts]: Start accepts. Automaton has 57023 states and 66286 transitions. Word has length 687 [2020-07-17 17:59:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:07,718 INFO L479 AbstractCegarLoop]: Abstraction has 57023 states and 66286 transitions. [2020-07-17 17:59:07,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:59:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57023 states and 66286 transitions. [2020-07-17 17:59:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-07-17 17:59:07,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:59:07,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:59:07,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 17:59:07,785 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:59:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:59:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1570166223, now seen corresponding path program 1 times [2020-07-17 17:59:07,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:59:07,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181819963] [2020-07-17 17:59:07,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:59:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1797 backedges. 267 proven. 16 refuted. 0 times theorem prover too weak. 1514 trivial. 0 not checked. [2020-07-17 17:59:08,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181819963] [2020-07-17 17:59:08,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:59:08,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 17:59:08,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82999923] [2020-07-17 17:59:08,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:59:08,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:59:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:59:08,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:59:08,353 INFO L87 Difference]: Start difference. First operand 57023 states and 66286 transitions. Second operand 5 states. [2020-07-17 17:59:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:59:18,948 INFO L93 Difference]: Finished difference Result 109988 states and 128055 transitions. [2020-07-17 17:59:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:59:18,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 802 [2020-07-17 17:59:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:59:19,138 INFO L225 Difference]: With dead ends: 109988 [2020-07-17 17:59:19,138 INFO L226 Difference]: Without dead ends: 56935 [2020-07-17 17:59:19,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:59:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56935 states. [2020-07-17 17:59:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56935 to 56821. [2020-07-17 17:59:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56821 states. [2020-07-17 17:59:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56821 states to 56821 states and 66020 transitions. [2020-07-17 17:59:24,683 INFO L78 Accepts]: Start accepts. Automaton has 56821 states and 66020 transitions. Word has length 802 [2020-07-17 17:59:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:24,683 INFO L479 AbstractCegarLoop]: Abstraction has 56821 states and 66020 transitions. [2020-07-17 17:59:24,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:59:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 56821 states and 66020 transitions. [2020-07-17 17:59:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-07-17 17:59:24,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:59:24,750 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-07-17 17:59:24,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 17:59:24,751 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:59:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:59:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash 691624545, now seen corresponding path program 1 times [2020-07-17 17:59:24,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:59:24,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577077338] [2020-07-17 17:59:24,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:59:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 521 proven. 300 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-07-17 17:59:25,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577077338] [2020-07-17 17:59:25,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:59:25,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:59:25,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122025625] [2020-07-17 17:59:25,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:59:25,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:59:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:59:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:59:25,645 INFO L87 Difference]: Start difference. First operand 56821 states and 66020 transitions. Second operand 7 states. [2020-07-17 17:59:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:59:40,416 INFO L93 Difference]: Finished difference Result 122298 states and 142211 transitions. [2020-07-17 17:59:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:59:40,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 805 [2020-07-17 17:59:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:59:40,621 INFO L225 Difference]: With dead ends: 122298 [2020-07-17 17:59:40,621 INFO L226 Difference]: Without dead ends: 65888 [2020-07-17 17:59:40,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:59:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65888 states. [2020-07-17 17:59:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65888 to 65087. [2020-07-17 17:59:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65087 states. [2020-07-17 17:59:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65087 states to 65087 states and 74992 transitions. [2020-07-17 17:59:47,509 INFO L78 Accepts]: Start accepts. Automaton has 65087 states and 74992 transitions. Word has length 805 [2020-07-17 17:59:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:59:47,510 INFO L479 AbstractCegarLoop]: Abstraction has 65087 states and 74992 transitions. [2020-07-17 17:59:47,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:59:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 65087 states and 74992 transitions. [2020-07-17 17:59:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-07-17 17:59:47,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:59:47,596 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:59:47,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 17:59:47,596 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:59:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:59:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash -293819967, now seen corresponding path program 1 times [2020-07-17 17:59:47,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:59:47,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610002826] [2020-07-17 17:59:47,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:59:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:59:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2250 backedges. 625 proven. 257 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-07-17 17:59:51,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610002826] [2020-07-17 17:59:51,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:59:51,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:59:51,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232595568] [2020-07-17 17:59:51,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:59:51,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:59:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:59:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:59:51,792 INFO L87 Difference]: Start difference. First operand 65087 states and 74992 transitions. Second operand 7 states. [2020-07-17 18:00:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:00:04,381 INFO L93 Difference]: Finished difference Result 134270 states and 154737 transitions. [2020-07-17 18:00:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 18:00:04,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 814 [2020-07-17 18:00:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:00:04,664 INFO L225 Difference]: With dead ends: 134270 [2020-07-17 18:00:04,664 INFO L226 Difference]: Without dead ends: 69594 [2020-07-17 18:00:04,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:00:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69594 states. [2020-07-17 18:00:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69594 to 66642. [2020-07-17 18:00:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66642 states. [2020-07-17 18:00:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66642 states to 66642 states and 76429 transitions. [2020-07-17 18:00:11,704 INFO L78 Accepts]: Start accepts. Automaton has 66642 states and 76429 transitions. Word has length 814 [2020-07-17 18:00:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:00:11,704 INFO L479 AbstractCegarLoop]: Abstraction has 66642 states and 76429 transitions. [2020-07-17 18:00:11,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:00:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 66642 states and 76429 transitions. [2020-07-17 18:00:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-07-17 18:00:11,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:00:11,787 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-17 18:00:11,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 18:00:11,788 INFO L427 AbstractCegarLoop]: === Iteration 24 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:00:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:00:11,788 INFO L82 PathProgramCache]: Analyzing trace with hash -228854500, now seen corresponding path program 1 times [2020-07-17 18:00:11,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:00:11,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875492389] [2020-07-17 18:00:11,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:00:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 539 proven. 308 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2020-07-17 18:00:13,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875492389] [2020-07-17 18:00:13,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:00:13,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 18:00:13,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307250803] [2020-07-17 18:00:13,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:00:13,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:00:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:00:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:00:13,006 INFO L87 Difference]: Start difference. First operand 66642 states and 76429 transitions. Second operand 11 states. [2020-07-17 18:00:13,738 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-07-17 18:00:15,348 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-07-17 18:00:15,800 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-07-17 18:00:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:00:31,677 INFO L93 Difference]: Finished difference Result 132067 states and 151397 transitions. [2020-07-17 18:00:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 18:00:31,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 814 [2020-07-17 18:00:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:00:31,904 INFO L225 Difference]: With dead ends: 132067 [2020-07-17 18:00:31,905 INFO L226 Difference]: Without dead ends: 65836 [2020-07-17 18:00:32,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 18:00:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65836 states. [2020-07-17 18:00:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65836 to 65613. [2020-07-17 18:00:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65613 states. [2020-07-17 18:00:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65613 states to 65613 states and 74834 transitions. [2020-07-17 18:00:39,965 INFO L78 Accepts]: Start accepts. Automaton has 65613 states and 74834 transitions. Word has length 814 [2020-07-17 18:00:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:00:39,965 INFO L479 AbstractCegarLoop]: Abstraction has 65613 states and 74834 transitions. [2020-07-17 18:00:39,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:00:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 65613 states and 74834 transitions. [2020-07-17 18:00:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-07-17 18:00:40,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:00:40,053 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:00:40,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 18:00:40,053 INFO L427 AbstractCegarLoop]: === Iteration 25 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:00:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:00:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -587128004, now seen corresponding path program 1 times [2020-07-17 18:00:40,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:00:40,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495919243] [2020-07-17 18:00:40,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:00:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:00:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1797 backedges. 597 proven. 198 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2020-07-17 18:00:41,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495919243] [2020-07-17 18:00:41,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:00:41,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 18:00:41,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270206363] [2020-07-17 18:00:41,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:00:41,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:00:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:00:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:00:41,560 INFO L87 Difference]: Start difference. First operand 65613 states and 74834 transitions. Second operand 8 states. [2020-07-17 18:00:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:00:59,624 INFO L93 Difference]: Finished difference Result 128768 states and 146868 transitions. [2020-07-17 18:00:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:00:59,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 818 [2020-07-17 18:00:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:01:00,049 INFO L225 Difference]: With dead ends: 128768 [2020-07-17 18:01:00,049 INFO L226 Difference]: Without dead ends: 63566 [2020-07-17 18:01:00,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:01:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63566 states. [2020-07-17 18:01:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63566 to 60978. [2020-07-17 18:01:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60978 states. [2020-07-17 18:01:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60978 states to 60978 states and 68723 transitions. [2020-07-17 18:01:07,408 INFO L78 Accepts]: Start accepts. Automaton has 60978 states and 68723 transitions. Word has length 818 [2020-07-17 18:01:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:01:07,408 INFO L479 AbstractCegarLoop]: Abstraction has 60978 states and 68723 transitions. [2020-07-17 18:01:07,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:01:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 60978 states and 68723 transitions. [2020-07-17 18:01:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2020-07-17 18:01:07,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:01:07,483 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:01:07,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 18:01:07,483 INFO L427 AbstractCegarLoop]: === Iteration 26 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:01:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:01:07,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1436428596, now seen corresponding path program 1 times [2020-07-17 18:01:07,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:01:07,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117305556] [2020-07-17 18:01:07,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:01:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 349 proven. 827 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-17 18:01:10,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117305556] [2020-07-17 18:01:10,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:01:10,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:01:10,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415507571] [2020-07-17 18:01:10,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:01:10,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:01:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:01:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:01:10,055 INFO L87 Difference]: Start difference. First operand 60978 states and 68723 transitions. Second operand 17 states. [2020-07-17 18:01:10,216 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-07-17 18:01:11,578 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-07-17 18:01:11,755 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-07-17 18:01:11,926 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-07-17 18:01:12,123 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-07-17 18:01:12,521 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-07-17 18:01:12,737 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-17 18:01:13,476 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-07-17 18:01:13,665 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-07-17 18:01:14,470 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-07-17 18:01:15,821 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-07-17 18:01:15,990 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-07-17 18:01:16,488 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-07-17 18:01:17,024 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-07-17 18:01:17,897 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-07-17 18:01:18,481 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-07-17 18:01:18,713 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-07-17 18:01:18,948 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-07-17 18:01:19,242 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-07-17 18:01:19,593 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-07-17 18:01:20,272 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-17 18:01:20,561 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-07-17 18:01:20,915 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-07-17 18:01:21,293 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-07-17 18:01:22,077 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2020-07-17 18:01:23,815 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-07-17 18:01:24,061 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-07-17 18:01:24,422 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-07-17 18:01:25,012 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-07-17 18:01:27,588 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-07-17 18:01:28,115 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-07-17 18:01:28,748 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-07-17 18:01:28,974 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-07-17 18:01:29,156 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-07-17 18:01:29,515 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-07-17 18:01:29,789 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-07-17 18:01:30,054 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-07-17 18:01:31,191 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-07-17 18:01:31,595 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-07-17 18:01:32,044 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-07-17 18:01:32,244 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-07-17 18:01:32,714 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-17 18:01:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:01:41,457 INFO L93 Difference]: Finished difference Result 117635 states and 132709 transitions. [2020-07-17 18:01:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-17 18:01:41,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 824 [2020-07-17 18:01:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:01:41,671 INFO L225 Difference]: With dead ends: 117635 [2020-07-17 18:01:41,671 INFO L226 Difference]: Without dead ends: 62010 [2020-07-17 18:01:41,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1182, Invalid=4824, Unknown=0, NotChecked=0, Total=6006 [2020-07-17 18:01:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62010 states. [2020-07-17 18:01:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62010 to 61005. [2020-07-17 18:01:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61005 states. [2020-07-17 18:01:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61005 states to 61005 states and 68713 transitions. [2020-07-17 18:01:50,200 INFO L78 Accepts]: Start accepts. Automaton has 61005 states and 68713 transitions. Word has length 824 [2020-07-17 18:01:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:01:50,200 INFO L479 AbstractCegarLoop]: Abstraction has 61005 states and 68713 transitions. [2020-07-17 18:01:50,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:01:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61005 states and 68713 transitions. [2020-07-17 18:01:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-07-17 18:01:50,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:01:50,274 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2020-07-17 18:01:50,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 18:01:50,275 INFO L427 AbstractCegarLoop]: === Iteration 27 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:01:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:01:50,276 INFO L82 PathProgramCache]: Analyzing trace with hash -329592989, now seen corresponding path program 1 times [2020-07-17 18:01:50,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:01:50,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521162040] [2020-07-17 18:01:50,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:01:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:01:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 391 proven. 805 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-17 18:01:56,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521162040] [2020-07-17 18:01:56,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:01:56,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:01:56,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924763811] [2020-07-17 18:01:56,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:01:56,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:01:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:01:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:01:56,891 INFO L87 Difference]: Start difference. First operand 61005 states and 68713 transitions. Second operand 15 states. [2020-07-17 18:01:58,389 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-17 18:01:58,858 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-17 18:01:59,378 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-07-17 18:01:59,837 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-07-17 18:02:02,066 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-07-17 18:02:05,704 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-07-17 18:02:05,954 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-07-17 18:02:08,014 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-07-17 18:02:08,401 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-07-17 18:02:15,351 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-07-17 18:02:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:02:25,141 INFO L93 Difference]: Finished difference Result 121934 states and 137419 transitions. [2020-07-17 18:02:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-17 18:02:25,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 834 [2020-07-17 18:02:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:02:25,558 INFO L225 Difference]: With dead ends: 121934 [2020-07-17 18:02:25,559 INFO L226 Difference]: Without dead ends: 66308 [2020-07-17 18:02:25,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:02:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66308 states. [2020-07-17 18:02:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66308 to 65306. [2020-07-17 18:02:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65306 states. [2020-07-17 18:02:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65306 states to 65306 states and 73484 transitions. [2020-07-17 18:02:34,606 INFO L78 Accepts]: Start accepts. Automaton has 65306 states and 73484 transitions. Word has length 834 [2020-07-17 18:02:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:02:34,607 INFO L479 AbstractCegarLoop]: Abstraction has 65306 states and 73484 transitions. [2020-07-17 18:02:34,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:02:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 65306 states and 73484 transitions. [2020-07-17 18:02:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-07-17 18:02:34,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:02:34,676 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2020-07-17 18:02:34,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 18:02:34,676 INFO L427 AbstractCegarLoop]: === Iteration 28 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:02:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:02:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1580504617, now seen corresponding path program 1 times [2020-07-17 18:02:34,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:02:34,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943204704] [2020-07-17 18:02:34,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:02:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:02:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 292 proven. 910 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-17 18:02:37,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943204704] [2020-07-17 18:02:37,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:02:37,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 18:02:37,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192750107] [2020-07-17 18:02:37,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 18:02:37,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:02:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 18:02:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:02:37,578 INFO L87 Difference]: Start difference. First operand 65306 states and 73484 transitions. Second operand 18 states. [2020-07-17 18:02:38,182 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-07-17 18:02:39,013 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-07-17 18:02:39,432 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2020-07-17 18:02:40,401 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-07-17 18:02:40,973 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-07-17 18:02:42,787 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-07-17 18:02:43,713 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-07-17 18:02:45,395 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-07-17 18:02:45,615 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-07-17 18:02:46,925 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-07-17 18:02:48,131 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-07-17 18:02:48,473 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-07-17 18:02:49,730 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-07-17 18:02:52,313 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-07-17 18:03:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:08,543 INFO L93 Difference]: Finished difference Result 133511 states and 150337 transitions. [2020-07-17 18:03:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 18:03:08,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 840 [2020-07-17 18:03:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:08,794 INFO L225 Difference]: With dead ends: 133511 [2020-07-17 18:03:08,794 INFO L226 Difference]: Without dead ends: 73820 [2020-07-17 18:03:08,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 18:03:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73820 states. [2020-07-17 18:03:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73820 to 70458. [2020-07-17 18:03:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70458 states. [2020-07-17 18:03:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70458 states to 70458 states and 79140 transitions. [2020-07-17 18:03:24,893 INFO L78 Accepts]: Start accepts. Automaton has 70458 states and 79140 transitions. Word has length 840 [2020-07-17 18:03:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:24,893 INFO L479 AbstractCegarLoop]: Abstraction has 70458 states and 79140 transitions. [2020-07-17 18:03:24,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 18:03:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 70458 states and 79140 transitions. [2020-07-17 18:03:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2020-07-17 18:03:24,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:24,981 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2020-07-17 18:03:24,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 18:03:24,981 INFO L427 AbstractCegarLoop]: === Iteration 29 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2134901194, now seen corresponding path program 1 times [2020-07-17 18:03:24,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:24,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580046830] [2020-07-17 18:03:24,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1874 backedges. 755 proven. 367 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-17 18:03:25,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580046830] [2020-07-17 18:03:25,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:25,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 18:03:25,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856655178] [2020-07-17 18:03:25,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:03:25,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:03:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:03:25,938 INFO L87 Difference]: Start difference. First operand 70458 states and 79140 transitions. Second operand 9 states. [2020-07-17 18:03:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:53,891 INFO L93 Difference]: Finished difference Result 161945 states and 182264 transitions. [2020-07-17 18:03:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 18:03:53,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 855 [2020-07-17 18:03:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:54,209 INFO L225 Difference]: With dead ends: 161945 [2020-07-17 18:03:54,209 INFO L226 Difference]: Without dead ends: 95209 [2020-07-17 18:03:54,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:03:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95209 states. [2020-07-17 18:04:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95209 to 91912. [2020-07-17 18:04:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91912 states. [2020-07-17 18:04:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91912 states to 91912 states and 102826 transitions. [2020-07-17 18:04:15,468 INFO L78 Accepts]: Start accepts. Automaton has 91912 states and 102826 transitions. Word has length 855 [2020-07-17 18:04:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:15,469 INFO L479 AbstractCegarLoop]: Abstraction has 91912 states and 102826 transitions. [2020-07-17 18:04:15,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:04:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 91912 states and 102826 transitions. [2020-07-17 18:04:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2020-07-17 18:04:15,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:15,597 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-07-17 18:04:15,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 18:04:15,597 INFO L427 AbstractCegarLoop]: === Iteration 30 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash -98386780, now seen corresponding path program 1 times [2020-07-17 18:04:15,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:15,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844895882] [2020-07-17 18:04:15,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 691 proven. 1235 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-07-17 18:04:17,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844895882] [2020-07-17 18:04:17,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:04:17,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 18:04:17,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575114846] [2020-07-17 18:04:17,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:04:17,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:04:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:04:17,023 INFO L87 Difference]: Start difference. First operand 91912 states and 102826 transitions. Second operand 10 states. [2020-07-17 18:04:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:43,517 INFO L93 Difference]: Finished difference Result 182844 states and 204832 transitions. [2020-07-17 18:04:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 18:04:43,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1160 [2020-07-17 18:04:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:43,823 INFO L225 Difference]: With dead ends: 182844 [2020-07-17 18:04:43,823 INFO L226 Difference]: Without dead ends: 96761 [2020-07-17 18:04:43,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:04:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96761 states. [2020-07-17 18:05:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96761 to 95003. [2020-07-17 18:05:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95003 states. [2020-07-17 18:05:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95003 states to 95003 states and 106194 transitions. [2020-07-17 18:05:00,433 INFO L78 Accepts]: Start accepts. Automaton has 95003 states and 106194 transitions. Word has length 1160 [2020-07-17 18:05:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:00,434 INFO L479 AbstractCegarLoop]: Abstraction has 95003 states and 106194 transitions. [2020-07-17 18:05:00,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:05:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 95003 states and 106194 transitions. [2020-07-17 18:05:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1350 [2020-07-17 18:05:00,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:00,550 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2020-07-17 18:05:00,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 18:05:00,551 INFO L427 AbstractCegarLoop]: === Iteration 31 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash 682903966, now seen corresponding path program 1 times [2020-07-17 18:05:00,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:00,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437751295] [2020-07-17 18:05:00,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5286 backedges. 1025 proven. 1169 refuted. 0 times theorem prover too weak. 3092 trivial. 0 not checked. [2020-07-17 18:05:07,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437751295] [2020-07-17 18:05:07,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:07,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 18:05:07,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908344133] [2020-07-17 18:05:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:05:07,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:05:07,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:05:07,559 INFO L87 Difference]: Start difference. First operand 95003 states and 106194 transitions. Second operand 9 states. [2020-07-17 18:05:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:35,090 INFO L93 Difference]: Finished difference Result 189663 states and 212235 transitions. [2020-07-17 18:05:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 18:05:35,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1349 [2020-07-17 18:05:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:35,418 INFO L225 Difference]: With dead ends: 189663 [2020-07-17 18:05:35,418 INFO L226 Difference]: Without dead ends: 100489 [2020-07-17 18:05:35,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:05:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100489 states. [2020-07-17 18:05:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100489 to 96729. [2020-07-17 18:05:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96729 states. [2020-07-17 18:05:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96729 states to 96729 states and 108051 transitions. [2020-07-17 18:05:52,580 INFO L78 Accepts]: Start accepts. Automaton has 96729 states and 108051 transitions. Word has length 1349 [2020-07-17 18:05:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:52,581 INFO L479 AbstractCegarLoop]: Abstraction has 96729 states and 108051 transitions. [2020-07-17 18:05:52,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:05:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 96729 states and 108051 transitions. [2020-07-17 18:05:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1368 [2020-07-17 18:05:52,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:52,727 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-07-17 18:05:52,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 18:05:52,727 INFO L427 AbstractCegarLoop]: === Iteration 32 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2146648060, now seen corresponding path program 1 times [2020-07-17 18:05:52,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:52,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15469386] [2020-07-17 18:05:52,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5410 backedges. 785 proven. 743 refuted. 0 times theorem prover too weak. 3882 trivial. 0 not checked. [2020-07-17 18:05:54,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15469386] [2020-07-17 18:05:54,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:05:54,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 18:05:54,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868595108] [2020-07-17 18:05:54,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:05:54,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:05:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:05:54,347 INFO L87 Difference]: Start difference. First operand 96729 states and 108051 transitions. Second operand 7 states. [2020-07-17 18:06:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:14,313 INFO L93 Difference]: Finished difference Result 136990 states and 152613 transitions. [2020-07-17 18:06:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:06:14,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1367 [2020-07-17 18:06:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:14,366 INFO L225 Difference]: With dead ends: 136990 [2020-07-17 18:06:14,366 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 18:06:14,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:06:14,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 18:06:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 18:06:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 18:06:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 18:06:14,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1367 [2020-07-17 18:06:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:14,561 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 18:06:14,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:06:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 18:06:14,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 18:06:14,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 18:06:14,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 18:06:45,150 WARN L193 SmtUtils]: Spent 12.33 s on a formula simplification that was a NOOP. DAG size: 1 [2020-07-17 18:06:59,554 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 1