/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:07,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:07,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:07,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:07,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:07,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:07,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:07,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:07,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:07,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:07,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:07,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:07,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:07,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:07,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:07,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:07,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:07,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:07,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:07,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:07,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:07,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:07,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:07,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:07,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:07,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:07,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:07,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:07,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:01:07,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:07,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:07,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:07,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:07,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:07,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:07,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:07,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:07,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:07,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:07,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:07,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:07,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:07,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:07,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:07,529 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:07,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:07,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:07,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:07,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:07,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:07,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:07,530 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 [2020-08-22 23:01:07,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:07,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:07,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:07,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:07,835 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:07,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 23:01:07,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2ac48da/823ad1577c8745c189cd82806ffdfdbc/FLAG8b459de3a [2020-08-22 23:01:08,437 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:08,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 23:01:08,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2ac48da/823ad1577c8745c189cd82806ffdfdbc/FLAG8b459de3a [2020-08-22 23:01:08,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2ac48da/823ad1577c8745c189cd82806ffdfdbc [2020-08-22 23:01:08,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:08,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:08,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:08,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:08,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:08,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:08" (1/1) ... [2020-08-22 23:01:08,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173022d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:08, skipping insertion in model container [2020-08-22 23:01:08,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:08" (1/1) ... [2020-08-22 23:01:08,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:08,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:09,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:09,102 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:09,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:09,261 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:09,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09 WrapperNode [2020-08-22 23:01:09,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:09,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:09,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:09,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:09,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (1/1) ... [2020-08-22 23:01:09,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:09,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:09,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:09,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:09,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (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 [2020-08-22 23:01:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:09,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:01:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-08-22 23:01:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:01:09,653 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:09,654 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:01:09,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:09 BoogieIcfgContainer [2020-08-22 23:01:09,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:09,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:09,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:09,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:09,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:08" (1/3) ... [2020-08-22 23:01:09,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117224b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:09, skipping insertion in model container [2020-08-22 23:01:09,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:09" (2/3) ... [2020-08-22 23:01:09,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117224b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:09, skipping insertion in model container [2020-08-22 23:01:09,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:09" (3/3) ... [2020-08-22 23:01:09,669 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-08-22 23:01:09,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:09,692 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:09,724 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:09,750 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:09,750 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:09,750 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:09,751 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:09,751 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:09,751 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:09,751 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:09,751 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 23:01:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:01:09,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:09,781 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] [2020-08-22 23:01:09,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:09,788 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-08-22 23:01:09,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:09,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882022445] [2020-08-22 23:01:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:10,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882022445] [2020-08-22 23:01:10,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:10,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:01:10,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617377473] [2020-08-22 23:01:10,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:01:10,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:01:10,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:10,072 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 23:01:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:10,253 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-08-22 23:01:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:01:10,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 23:01:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:10,267 INFO L225 Difference]: With dead ends: 98 [2020-08-22 23:01:10,267 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 23:01:10,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 23:01:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-08-22 23:01:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 23:01:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 23:01:10,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-08-22 23:01:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:10,321 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 23:01:10,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:01:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 23:01:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:01:10,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:10,322 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] [2020-08-22 23:01:10,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:10,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-08-22 23:01:10,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:10,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578942267] [2020-08-22 23:01:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:10,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578942267] [2020-08-22 23:01:10,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:10,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:10,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139201173] [2020-08-22 23:01:10,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:10,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:10,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:10,442 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-08-22 23:01:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:10,648 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-08-22 23:01:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:10,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-22 23:01:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:10,651 INFO L225 Difference]: With dead ends: 88 [2020-08-22 23:01:10,651 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 23:01:10,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 23:01:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-08-22 23:01:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 23:01:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-08-22 23:01:10,666 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-08-22 23:01:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:10,667 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-08-22 23:01:10,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-08-22 23:01:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:01:10,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:10,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:10,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:10,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-08-22 23:01:10,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:10,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61180627] [2020-08-22 23:01:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:10,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61180627] [2020-08-22 23:01:10,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:10,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:10,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241789905] [2020-08-22 23:01:10,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:10,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:10,766 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-08-22 23:01:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:10,954 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-08-22 23:01:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:10,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-08-22 23:01:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:10,956 INFO L225 Difference]: With dead ends: 100 [2020-08-22 23:01:10,957 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 23:01:10,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 23:01:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-08-22 23:01:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 23:01:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-22 23:01:10,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-08-22 23:01:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:10,969 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-22 23:01:10,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-22 23:01:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 23:01:10,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:10,971 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] [2020-08-22 23:01:10,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:10,971 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:10,972 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-08-22 23:01:10,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:10,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332893511] [2020-08-22 23:01:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:11,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332893511] [2020-08-22 23:01:11,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:11,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:11,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163873207] [2020-08-22 23:01:11,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:11,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:11,080 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-08-22 23:01:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:11,225 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-08-22 23:01:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:11,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-22 23:01:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:11,227 INFO L225 Difference]: With dead ends: 79 [2020-08-22 23:01:11,227 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 23:01:11,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 23:01:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-22 23:01:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:01:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 23:01:11,236 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-08-22 23:01:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:11,237 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 23:01:11,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 23:01:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:01:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:11,239 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] [2020-08-22 23:01:11,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:01:11,239 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-08-22 23:01:11,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:11,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681957493] [2020-08-22 23:01:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:11,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681957493] [2020-08-22 23:01:11,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:11,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:01:11,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827176068] [2020-08-22 23:01:11,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:01:11,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:01:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:01:11,456 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-08-22 23:01:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:11,647 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-08-22 23:01:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:01:11,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-22 23:01:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:11,649 INFO L225 Difference]: With dead ends: 89 [2020-08-22 23:01:11,650 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 23:01:11,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:01:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 23:01:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-08-22 23:01:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 23:01:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-22 23:01:11,666 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-08-22 23:01:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:11,666 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-22 23:01:11,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:01:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-22 23:01:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 23:01:11,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:11,671 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 23:01:11,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:01:11,672 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-08-22 23:01:11,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:11,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749949393] [2020-08-22 23:01:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:11,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749949393] [2020-08-22 23:01:11,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:11,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:01:11,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085607034] [2020-08-22 23:01:11,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:01:11,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:01:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:01:11,920 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-08-22 23:01:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:12,154 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-08-22 23:01:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:01:12,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-08-22 23:01:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:12,158 INFO L225 Difference]: With dead ends: 107 [2020-08-22 23:01:12,158 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 23:01:12,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 23:01:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-08-22 23:01:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 23:01:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-22 23:01:12,180 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-08-22 23:01:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:12,181 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-22 23:01:12,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:01:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-22 23:01:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 23:01:12,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:12,183 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:12,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:01:12,187 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-08-22 23:01:12,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:12,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579322188] [2020-08-22 23:01:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:12,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:12,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579322188] [2020-08-22 23:01:12,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:12,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:01:12,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462055614] [2020-08-22 23:01:12,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:01:12,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:01:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:01:12,431 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-08-22 23:01:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:12,819 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-08-22 23:01:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:01:12,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-08-22 23:01:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:12,821 INFO L225 Difference]: With dead ends: 125 [2020-08-22 23:01:12,821 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 23:01:12,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:01:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 23:01:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-08-22 23:01:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 23:01:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 23:01:12,833 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-08-22 23:01:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:12,833 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 23:01:12,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:01:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 23:01:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 23:01:12,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:12,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:12,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:01:12,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-08-22 23:01:12,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:12,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809993972] [2020-08-22 23:01:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:13,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809993972] [2020-08-22 23:01:13,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:13,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:01:13,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766466334] [2020-08-22 23:01:13,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:01:13,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:01:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:01:13,043 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-08-22 23:01:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:13,422 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-08-22 23:01:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:01:13,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-08-22 23:01:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:13,426 INFO L225 Difference]: With dead ends: 143 [2020-08-22 23:01:13,426 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 23:01:13,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:01:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 23:01:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-08-22 23:01:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 23:01:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 23:01:13,448 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-08-22 23:01:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:13,449 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 23:01:13,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:01:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 23:01:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 23:01:13,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:13,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:13,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:01:13,452 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-08-22 23:01:13,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:13,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316059167] [2020-08-22 23:01:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316059167] [2020-08-22 23:01:13,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:13,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:01:13,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910907389] [2020-08-22 23:01:13,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:01:13,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:13,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:01:13,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:01:13,774 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-08-22 23:01:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:14,253 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-08-22 23:01:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 23:01:14,254 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-08-22 23:01:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:14,255 INFO L225 Difference]: With dead ends: 161 [2020-08-22 23:01:14,255 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 23:01:14,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:01:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 23:01:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-08-22 23:01:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 23:01:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 23:01:14,277 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-08-22 23:01:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:14,278 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 23:01:14,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:01:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 23:01:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 23:01:14,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:14,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:14,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:01:14,280 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-08-22 23:01:14,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:14,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546177736] [2020-08-22 23:01:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:14,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:14,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546177736] [2020-08-22 23:01:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:01:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646180393] [2020-08-22 23:01:14,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:01:14,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:01:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:01:14,565 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-08-22 23:01:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:15,313 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-08-22 23:01:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:01:15,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 23:01:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:15,315 INFO L225 Difference]: With dead ends: 179 [2020-08-22 23:01:15,315 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 23:01:15,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:01:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 23:01:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-08-22 23:01:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 23:01:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-08-22 23:01:15,326 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-08-22 23:01:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:15,327 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-08-22 23:01:15,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:01:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-08-22 23:01:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 23:01:15,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:15,328 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:15,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:01:15,329 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-08-22 23:01:15,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:15,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615728842] [2020-08-22 23:01:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:15,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:15,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615728842] [2020-08-22 23:01:15,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:15,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:01:15,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866891816] [2020-08-22 23:01:15,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:01:15,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:01:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:01:15,670 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2020-08-22 23:01:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:16,409 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-08-22 23:01:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 23:01:16,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 23:01:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:16,411 INFO L225 Difference]: With dead ends: 197 [2020-08-22 23:01:16,411 INFO L226 Difference]: Without dead ends: 119 [2020-08-22 23:01:16,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:01:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-22 23:01:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-08-22 23:01:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 23:01:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-08-22 23:01:16,428 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-08-22 23:01:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:16,430 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-08-22 23:01:16,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:01:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-08-22 23:01:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 23:01:16,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:16,432 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:16,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:01:16,432 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1447691732, now seen corresponding path program 8 times [2020-08-22 23:01:16,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:16,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150529094] [2020-08-22 23:01:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:16,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 2 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:16,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150529094] [2020-08-22 23:01:16,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:16,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:01:16,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554795245] [2020-08-22 23:01:16,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:01:16,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:01:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:01:16,877 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 20 states. [2020-08-22 23:01:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:17,831 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2020-08-22 23:01:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 23:01:17,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-08-22 23:01:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:17,833 INFO L225 Difference]: With dead ends: 215 [2020-08-22 23:01:17,833 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 23:01:17,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:01:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 23:01:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2020-08-22 23:01:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 23:01:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-08-22 23:01:17,843 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 104 [2020-08-22 23:01:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:17,844 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-08-22 23:01:17,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:01:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-08-22 23:01:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 23:01:17,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:17,845 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:17,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:01:17,846 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash 221143991, now seen corresponding path program 9 times [2020-08-22 23:01:17,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:17,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279182488] [2020-08-22 23:01:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 2 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:18,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279182488] [2020-08-22 23:01:18,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:18,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:01:18,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322141664] [2020-08-22 23:01:18,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:01:18,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:01:18,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:01:18,309 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 22 states. [2020-08-22 23:01:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:19,353 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2020-08-22 23:01:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 23:01:19,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-08-22 23:01:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:19,357 INFO L225 Difference]: With dead ends: 233 [2020-08-22 23:01:19,357 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 23:01:19,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:01:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 23:01:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-08-22 23:01:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 23:01:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-08-22 23:01:19,368 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 113 [2020-08-22 23:01:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:19,368 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-08-22 23:01:19,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:01:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-08-22 23:01:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 23:01:19,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:19,370 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:19,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:01:19,370 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 570553652, now seen corresponding path program 10 times [2020-08-22 23:01:19,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:19,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479776666] [2020-08-22 23:01:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:19,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:19,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479776666] [2020-08-22 23:01:19,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:19,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:01:19,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736521952] [2020-08-22 23:01:19,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:01:19,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:19,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:01:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:01:19,890 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 24 states. [2020-08-22 23:01:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:21,248 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2020-08-22 23:01:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:01:21,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 122 [2020-08-22 23:01:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:21,250 INFO L225 Difference]: With dead ends: 251 [2020-08-22 23:01:21,250 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 23:01:21,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:01:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 23:01:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-08-22 23:01:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 23:01:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-08-22 23:01:21,263 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2020-08-22 23:01:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:21,263 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-08-22 23:01:21,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:01:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-08-22 23:01:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 23:01:21,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:21,267 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:21,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:01:21,267 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1417822121, now seen corresponding path program 11 times [2020-08-22 23:01:21,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:21,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391617526] [2020-08-22 23:01:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:21,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 2 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:21,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391617526] [2020-08-22 23:01:21,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:21,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:01:21,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451262335] [2020-08-22 23:01:21,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:01:21,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:01:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:01:21,933 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 26 states. [2020-08-22 23:01:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:23,494 INFO L93 Difference]: Finished difference Result 269 states and 274 transitions. [2020-08-22 23:01:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 23:01:23,494 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-08-22 23:01:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:23,495 INFO L225 Difference]: With dead ends: 269 [2020-08-22 23:01:23,496 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 23:01:23,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:01:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 23:01:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-08-22 23:01:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 23:01:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-08-22 23:01:23,506 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-08-22 23:01:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:23,506 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-08-22 23:01:23,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:01:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-08-22 23:01:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 23:01:23,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:23,508 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:23,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:01:23,509 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1059114132, now seen corresponding path program 12 times [2020-08-22 23:01:23,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:23,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388539512] [2020-08-22 23:01:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:24,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 2 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:24,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388539512] [2020-08-22 23:01:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 23:01:24,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896972158] [2020-08-22 23:01:24,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 23:01:24,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 23:01:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:01:24,310 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 28 states. [2020-08-22 23:01:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:26,300 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2020-08-22 23:01:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:01:26,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2020-08-22 23:01:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:26,302 INFO L225 Difference]: With dead ends: 287 [2020-08-22 23:01:26,302 INFO L226 Difference]: Without dead ends: 164 [2020-08-22 23:01:26,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:01:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-22 23:01:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2020-08-22 23:01:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 23:01:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-08-22 23:01:26,313 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 140 [2020-08-22 23:01:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:26,314 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-08-22 23:01:26,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 23:01:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-08-22 23:01:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-22 23:01:26,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:26,315 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:26,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:01:26,316 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1179962121, now seen corresponding path program 13 times [2020-08-22 23:01:26,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:26,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475152042] [2020-08-22 23:01:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:27,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475152042] [2020-08-22 23:01:27,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:27,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:01:27,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676790449] [2020-08-22 23:01:27,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:01:27,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:01:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:01:27,124 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 30 states. [2020-08-22 23:01:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:29,205 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2020-08-22 23:01:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 23:01:29,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-08-22 23:01:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:29,208 INFO L225 Difference]: With dead ends: 305 [2020-08-22 23:01:29,208 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 23:01:29,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:01:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 23:01:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2020-08-22 23:01:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 23:01:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-08-22 23:01:29,220 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 149 [2020-08-22 23:01:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:29,221 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-08-22 23:01:29,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:01:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-08-22 23:01:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 23:01:29,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:29,223 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:29,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:01:29,223 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash -927167500, now seen corresponding path program 14 times [2020-08-22 23:01:29,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:29,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858168102] [2020-08-22 23:01:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:30,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 2 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:30,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858168102] [2020-08-22 23:01:30,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:30,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:01:30,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061231125] [2020-08-22 23:01:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:01:30,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:01:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:01:30,076 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 32 states. [2020-08-22 23:01:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:32,473 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2020-08-22 23:01:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 23:01:32,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 158 [2020-08-22 23:01:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:32,477 INFO L225 Difference]: With dead ends: 323 [2020-08-22 23:01:32,477 INFO L226 Difference]: Without dead ends: 182 [2020-08-22 23:01:32,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:01:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-22 23:01:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2020-08-22 23:01:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 23:01:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-08-22 23:01:32,490 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-08-22 23:01:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:32,490 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-08-22 23:01:32,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:01:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-08-22 23:01:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-22 23:01:32,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:32,493 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:32,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:01:32,493 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:32,494 INFO L82 PathProgramCache]: Analyzing trace with hash 895533463, now seen corresponding path program 15 times [2020-08-22 23:01:32,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:32,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328457483] [2020-08-22 23:01:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:33,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:33,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328457483] [2020-08-22 23:01:33,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:33,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 23:01:33,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728004407] [2020-08-22 23:01:33,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 23:01:33,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 23:01:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 23:01:33,499 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 34 states. [2020-08-22 23:01:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:36,163 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-08-22 23:01:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 23:01:36,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-08-22 23:01:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:36,165 INFO L225 Difference]: With dead ends: 341 [2020-08-22 23:01:36,165 INFO L226 Difference]: Without dead ends: 191 [2020-08-22 23:01:36,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:01:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-08-22 23:01:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2020-08-22 23:01:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 23:01:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-08-22 23:01:36,190 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 167 [2020-08-22 23:01:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:36,191 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-08-22 23:01:36,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 23:01:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-08-22 23:01:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 23:01:36,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:36,193 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:36,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:01:36,194 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:36,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2140458156, now seen corresponding path program 16 times [2020-08-22 23:01:36,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:36,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190389504] [2020-08-22 23:01:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 2 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:37,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190389504] [2020-08-22 23:01:37,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:37,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:01:37,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729654544] [2020-08-22 23:01:37,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:01:37,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:01:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:01:37,284 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 36 states. [2020-08-22 23:01:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:40,287 INFO L93 Difference]: Finished difference Result 359 states and 364 transitions. [2020-08-22 23:01:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 23:01:40,288 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-08-22 23:01:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:40,290 INFO L225 Difference]: With dead ends: 359 [2020-08-22 23:01:40,290 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 23:01:40,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=4442, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:01:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 23:01:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-08-22 23:01:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 23:01:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-08-22 23:01:40,304 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 176 [2020-08-22 23:01:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:40,304 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-08-22 23:01:40,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:01:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-08-22 23:01:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 23:01:40,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:40,307 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:40,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:01:40,307 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash -976722377, now seen corresponding path program 17 times [2020-08-22 23:01:40,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:40,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564840763] [2020-08-22 23:01:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:41,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 2 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:41,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564840763] [2020-08-22 23:01:41,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:41,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 23:01:41,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951537326] [2020-08-22 23:01:41,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 23:01:41,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 23:01:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 23:01:41,435 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 38 states. [2020-08-22 23:01:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:44,735 INFO L93 Difference]: Finished difference Result 377 states and 382 transitions. [2020-08-22 23:01:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 23:01:44,741 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 185 [2020-08-22 23:01:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:44,742 INFO L225 Difference]: With dead ends: 377 [2020-08-22 23:01:44,743 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 23:01:44,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:01:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 23:01:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2020-08-22 23:01:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 23:01:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-08-22 23:01:44,754 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2020-08-22 23:01:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:44,755 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-08-22 23:01:44,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 23:01:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-08-22 23:01:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-22 23:01:44,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:44,757 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:44,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:01:44,758 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash 776127156, now seen corresponding path program 18 times [2020-08-22 23:01:44,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:44,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075663563] [2020-08-22 23:01:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:45,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 2 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:46,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075663563] [2020-08-22 23:01:46,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:46,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:01:46,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015242403] [2020-08-22 23:01:46,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:01:46,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:46,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:01:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:01:46,048 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 40 states. [2020-08-22 23:01:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:49,688 INFO L93 Difference]: Finished difference Result 395 states and 400 transitions. [2020-08-22 23:01:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 23:01:49,695 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 194 [2020-08-22 23:01:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:49,697 INFO L225 Difference]: With dead ends: 395 [2020-08-22 23:01:49,697 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 23:01:49,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:01:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 23:01:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2020-08-22 23:01:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:01:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-08-22 23:01:49,711 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-08-22 23:01:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:49,712 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-08-22 23:01:49,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:01:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-08-22 23:01:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-08-22 23:01:49,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:49,713 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:49,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:01:49,714 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1535910615, now seen corresponding path program 19 times [2020-08-22 23:01:49,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:49,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816972088] [2020-08-22 23:01:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:51,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 2 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:51,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816972088] [2020-08-22 23:01:51,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:51,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 23:01:51,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664474811] [2020-08-22 23:01:51,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 23:01:51,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:51,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 23:01:51,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 23:01:51,123 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 42 states. [2020-08-22 23:01:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:55,153 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2020-08-22 23:01:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-08-22 23:01:55,154 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 203 [2020-08-22 23:01:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:55,155 INFO L225 Difference]: With dead ends: 413 [2020-08-22 23:01:55,155 INFO L226 Difference]: Without dead ends: 227 [2020-08-22 23:01:55,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=295, Invalid=6185, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:01:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-08-22 23:01:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2020-08-22 23:01:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 23:01:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2020-08-22 23:01:55,167 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 203 [2020-08-22 23:01:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:55,167 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2020-08-22 23:01:55,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 23:01:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2020-08-22 23:01:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-08-22 23:01:55,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:55,168 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:01:55,169 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash 14236180, now seen corresponding path program 20 times [2020-08-22 23:01:55,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:55,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222675053] [2020-08-22 23:01:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 2 proven. 1730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:56,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222675053] [2020-08-22 23:01:56,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:56,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:01:56,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610533077] [2020-08-22 23:01:56,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:01:56,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:01:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:01:56,672 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 44 states. [2020-08-22 23:02:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:01,110 INFO L93 Difference]: Finished difference Result 431 states and 436 transitions. [2020-08-22 23:02:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 23:02:01,117 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2020-08-22 23:02:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:01,121 INFO L225 Difference]: With dead ends: 431 [2020-08-22 23:02:01,122 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 23:02:01,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:02:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 23:02:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2020-08-22 23:02:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:02:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-08-22 23:02:01,136 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 212 [2020-08-22 23:02:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:01,136 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-08-22 23:02:01,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:02:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-08-22 23:02:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-08-22 23:02:01,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:01,137 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:01,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:02:01,138 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash -791283849, now seen corresponding path program 21 times [2020-08-22 23:02:01,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:01,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751672096] [2020-08-22 23:02:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 2 proven. 1911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:02,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751672096] [2020-08-22 23:02:02,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:02,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 23:02:02,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832945493] [2020-08-22 23:02:02,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 23:02:02,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 23:02:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:02:02,821 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand 46 states. [2020-08-22 23:02:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,722 INFO L93 Difference]: Finished difference Result 449 states and 454 transitions. [2020-08-22 23:02:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-08-22 23:02:07,723 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-08-22 23:02:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,724 INFO L225 Difference]: With dead ends: 449 [2020-08-22 23:02:07,725 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 23:02:07,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:02:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 23:02:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2020-08-22 23:02:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 23:02:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-08-22 23:02:07,739 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-08-22 23:02:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,739 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-08-22 23:02:07,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 23:02:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-08-22 23:02:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 23:02:07,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,741 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:07,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:02:07,741 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -314271372, now seen corresponding path program 22 times [2020-08-22 23:02:07,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236987285] [2020-08-22 23:02:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 2 proven. 2101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:09,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236987285] [2020-08-22 23:02:09,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:09,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:02:09,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250588921] [2020-08-22 23:02:09,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:02:09,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:09,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:02:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:02:09,631 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2020-08-22 23:02:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:14,835 INFO L93 Difference]: Finished difference Result 467 states and 472 transitions. [2020-08-22 23:02:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 23:02:14,836 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 230 [2020-08-22 23:02:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:14,838 INFO L225 Difference]: With dead ends: 467 [2020-08-22 23:02:14,838 INFO L226 Difference]: Without dead ends: 254 [2020-08-22 23:02:14,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=340, Invalid=8216, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:02:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-22 23:02:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 240. [2020-08-22 23:02:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 23:02:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2020-08-22 23:02:14,858 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 230 [2020-08-22 23:02:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:14,859 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2020-08-22 23:02:14,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:02:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2020-08-22 23:02:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-08-22 23:02:14,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:14,861 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:14,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:02:14,861 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1991252969, now seen corresponding path program 23 times [2020-08-22 23:02:14,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:14,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726416683] [2020-08-22 23:02:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 2 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726416683] [2020-08-22 23:02:17,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:17,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 23:02:17,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792424098] [2020-08-22 23:02:17,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 23:02:17,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 23:02:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 23:02:17,038 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 50 states. [2020-08-22 23:02:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:22,887 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-08-22 23:02:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-08-22 23:02:22,888 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 239 [2020-08-22 23:02:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:22,889 INFO L225 Difference]: With dead ends: 485 [2020-08-22 23:02:22,889 INFO L226 Difference]: Without dead ends: 263 [2020-08-22 23:02:22,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=355, Invalid=8957, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:02:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-08-22 23:02:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2020-08-22 23:02:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-22 23:02:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2020-08-22 23:02:22,903 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2020-08-22 23:02:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:22,904 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2020-08-22 23:02:22,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 23:02:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2020-08-22 23:02:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-22 23:02:22,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:22,905 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:22,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:02:22,906 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 253419732, now seen corresponding path program 24 times [2020-08-22 23:02:22,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:22,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595550206] [2020-08-22 23:02:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 2 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:25,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595550206] [2020-08-22 23:02:25,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:25,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:02:25,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547479830] [2020-08-22 23:02:25,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:02:25,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:02:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:02:25,285 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand 52 states. [2020-08-22 23:02:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:31,639 INFO L93 Difference]: Finished difference Result 503 states and 508 transitions. [2020-08-22 23:02:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 23:02:31,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2020-08-22 23:02:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:31,642 INFO L225 Difference]: With dead ends: 503 [2020-08-22 23:02:31,642 INFO L226 Difference]: Without dead ends: 272 [2020-08-22 23:02:31,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=370, Invalid=9730, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:02:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-08-22 23:02:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 258. [2020-08-22 23:02:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 23:02:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2020-08-22 23:02:31,657 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 248 [2020-08-22 23:02:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:31,658 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2020-08-22 23:02:31,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:02:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2020-08-22 23:02:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-08-22 23:02:31,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:31,661 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:31,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:02:31,661 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash 304343223, now seen corresponding path program 25 times [2020-08-22 23:02:31,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:31,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898234001] [2020-08-22 23:02:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:33,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2727 backedges. 2 proven. 2725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:34,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898234001] [2020-08-22 23:02:34,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:34,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 23:02:34,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027660695] [2020-08-22 23:02:34,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 23:02:34,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 23:02:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 23:02:34,081 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand 54 states. [2020-08-22 23:02:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:40,739 INFO L93 Difference]: Finished difference Result 521 states and 526 transitions. [2020-08-22 23:02:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-08-22 23:02:40,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 257 [2020-08-22 23:02:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:40,742 INFO L225 Difference]: With dead ends: 521 [2020-08-22 23:02:40,742 INFO L226 Difference]: Without dead ends: 281 [2020-08-22 23:02:40,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=385, Invalid=10535, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 23:02:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-08-22 23:02:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2020-08-22 23:02:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 23:02:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-08-22 23:02:40,756 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-08-22 23:02:40,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:40,756 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-08-22 23:02:40,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 23:02:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-08-22 23:02:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-08-22 23:02:40,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:40,758 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:40,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:02:40,758 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash 141692980, now seen corresponding path program 26 times [2020-08-22 23:02:40,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:40,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829830816] [2020-08-22 23:02:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:43,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 2 proven. 2951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:43,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829830816] [2020-08-22 23:02:43,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:43,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 23:02:43,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361657522] [2020-08-22 23:02:43,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 23:02:43,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:43,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 23:02:43,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:02:43,384 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 56 states. [2020-08-22 23:02:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:50,564 INFO L93 Difference]: Finished difference Result 539 states and 544 transitions. [2020-08-22 23:02:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 23:02:50,564 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 266 [2020-08-22 23:02:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:50,566 INFO L225 Difference]: With dead ends: 539 [2020-08-22 23:02:50,566 INFO L226 Difference]: Without dead ends: 290 [2020-08-22 23:02:50,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=400, Invalid=11372, Unknown=0, NotChecked=0, Total=11772 [2020-08-22 23:02:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-08-22 23:02:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 276. [2020-08-22 23:02:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 23:02:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2020-08-22 23:02:50,581 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 266 [2020-08-22 23:02:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:50,582 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2020-08-22 23:02:50,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 23:02:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2020-08-22 23:02:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-08-22 23:02:50,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:50,584 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:50,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:02:50,584 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1040448169, now seen corresponding path program 27 times [2020-08-22 23:02:50,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:50,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998403883] [2020-08-22 23:02:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:53,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 2 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:53,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998403883] [2020-08-22 23:02:53,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:53,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-22 23:02:53,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105836132] [2020-08-22 23:02:53,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 23:02:53,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 23:02:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 23:02:53,477 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 58 states. [2020-08-22 23:03:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:01,011 INFO L93 Difference]: Finished difference Result 557 states and 562 transitions. [2020-08-22 23:03:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-08-22 23:03:01,016 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-08-22 23:03:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:01,018 INFO L225 Difference]: With dead ends: 557 [2020-08-22 23:03:01,018 INFO L226 Difference]: Without dead ends: 299 [2020-08-22 23:03:01,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=415, Invalid=12241, Unknown=0, NotChecked=0, Total=12656 [2020-08-22 23:03:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-08-22 23:03:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 285. [2020-08-22 23:03:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-08-22 23:03:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2020-08-22 23:03:01,032 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 275 [2020-08-22 23:03:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:01,032 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2020-08-22 23:03:01,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 23:03:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2020-08-22 23:03:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-08-22 23:03:01,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:01,034 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:01,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:03:01,035 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1642080148, now seen corresponding path program 28 times [2020-08-22 23:03:01,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:01,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63059345] [2020-08-22 23:03:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:04,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 2 proven. 3430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:04,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63059345] [2020-08-22 23:03:04,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:04,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 23:03:04,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701300891] [2020-08-22 23:03:04,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 23:03:04,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 23:03:04,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:03:04,125 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 60 states. [2020-08-22 23:03:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:12,273 INFO L93 Difference]: Finished difference Result 575 states and 580 transitions. [2020-08-22 23:03:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 23:03:12,273 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 284 [2020-08-22 23:03:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:12,275 INFO L225 Difference]: With dead ends: 575 [2020-08-22 23:03:12,275 INFO L226 Difference]: Without dead ends: 308 [2020-08-22 23:03:12,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=430, Invalid=13142, Unknown=0, NotChecked=0, Total=13572 [2020-08-22 23:03:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-22 23:03:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 294. [2020-08-22 23:03:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 23:03:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-08-22 23:03:12,290 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-08-22 23:03:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:12,290 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-08-22 23:03:12,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 23:03:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-08-22 23:03:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-08-22 23:03:12,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:12,292 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:12,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:03:12,293 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1493318135, now seen corresponding path program 29 times [2020-08-22 23:03:12,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:12,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342734806] [2020-08-22 23:03:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:15,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3685 backedges. 2 proven. 3683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:15,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342734806] [2020-08-22 23:03:15,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:15,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-08-22 23:03:15,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316365849] [2020-08-22 23:03:15,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 23:03:15,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 23:03:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 23:03:15,784 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 62 states. [2020-08-22 23:03:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:24,548 INFO L93 Difference]: Finished difference Result 593 states and 598 transitions. [2020-08-22 23:03:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-08-22 23:03:24,550 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 293 [2020-08-22 23:03:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:24,552 INFO L225 Difference]: With dead ends: 593 [2020-08-22 23:03:24,552 INFO L226 Difference]: Without dead ends: 317 [2020-08-22 23:03:24,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=445, Invalid=14075, Unknown=0, NotChecked=0, Total=14520 [2020-08-22 23:03:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-08-22 23:03:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 303. [2020-08-22 23:03:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-08-22 23:03:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2020-08-22 23:03:24,567 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 293 [2020-08-22 23:03:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:24,568 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2020-08-22 23:03:24,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 23:03:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2020-08-22 23:03:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-08-22 23:03:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:24,570 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:24,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:03:24,570 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -361027852, now seen corresponding path program 30 times [2020-08-22 23:03:24,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:24,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342771998] [2020-08-22 23:03:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:28,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3947 backedges. 2 proven. 3945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:28,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342771998] [2020-08-22 23:03:28,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:28,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-08-22 23:03:28,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266502701] [2020-08-22 23:03:28,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 23:03:28,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 23:03:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:03:28,253 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand 64 states. [2020-08-22 23:03:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:37,708 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2020-08-22 23:03:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 23:03:37,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 302 [2020-08-22 23:03:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:37,712 INFO L225 Difference]: With dead ends: 611 [2020-08-22 23:03:37,712 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 23:03:37,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=460, Invalid=15040, Unknown=0, NotChecked=0, Total=15500 [2020-08-22 23:03:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 23:03:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 312. [2020-08-22 23:03:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 23:03:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2020-08-22 23:03:37,729 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 302 [2020-08-22 23:03:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:37,729 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2020-08-22 23:03:37,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 23:03:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2020-08-22 23:03:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-22 23:03:37,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:37,732 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:37,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:03:37,732 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1595898217, now seen corresponding path program 31 times [2020-08-22 23:03:37,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:37,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464081027] [2020-08-22 23:03:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:41,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 2 proven. 4216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:41,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464081027] [2020-08-22 23:03:41,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:41,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-08-22 23:03:41,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762565172] [2020-08-22 23:03:41,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 23:03:41,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 23:03:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 23:03:41,656 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand 66 states. [2020-08-22 23:03:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:51,473 INFO L93 Difference]: Finished difference Result 629 states and 634 transitions. [2020-08-22 23:03:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-08-22 23:03:51,474 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 311 [2020-08-22 23:03:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:51,475 INFO L225 Difference]: With dead ends: 629 [2020-08-22 23:03:51,475 INFO L226 Difference]: Without dead ends: 335 [2020-08-22 23:03:51,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=475, Invalid=16037, Unknown=0, NotChecked=0, Total=16512 [2020-08-22 23:03:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-22 23:03:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 321. [2020-08-22 23:03:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-22 23:03:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2020-08-22 23:03:51,491 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 311 [2020-08-22 23:03:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:51,492 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2020-08-22 23:03:51,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 23:03:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2020-08-22 23:03:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 23:03:51,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:51,494 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:51,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:03:51,494 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 400100948, now seen corresponding path program 32 times [2020-08-22 23:03:51,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:51,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549040329] [2020-08-22 23:03:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:55,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 2 proven. 4496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:55,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549040329] [2020-08-22 23:03:55,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:55,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-08-22 23:03:55,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228525846] [2020-08-22 23:03:55,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 23:03:55,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 23:03:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:03:55,513 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 68 states. [2020-08-22 23:04:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:05,637 INFO L93 Difference]: Finished difference Result 647 states and 652 transitions. [2020-08-22 23:04:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 23:04:05,638 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 320 [2020-08-22 23:04:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:05,640 INFO L225 Difference]: With dead ends: 647 [2020-08-22 23:04:05,641 INFO L226 Difference]: Without dead ends: 344 [2020-08-22 23:04:05,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=490, Invalid=17066, Unknown=0, NotChecked=0, Total=17556 [2020-08-22 23:04:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-08-22 23:04:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2020-08-22 23:04:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-08-22 23:04:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-08-22 23:04:05,656 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-08-22 23:04:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:05,657 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-08-22 23:04:05,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 23:04:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-08-22 23:04:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 23:04:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:05,660 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:05,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:04:05,660 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 213969719, now seen corresponding path program 33 times [2020-08-22 23:04:05,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:05,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881812220] [2020-08-22 23:04:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:09,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4787 backedges. 2 proven. 4785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:10,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881812220] [2020-08-22 23:04:10,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:10,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-08-22 23:04:10,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172938120] [2020-08-22 23:04:10,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 23:04:10,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 23:04:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 23:04:10,052 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 70 states. [2020-08-22 23:04:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:20,915 INFO L93 Difference]: Finished difference Result 665 states and 670 transitions. [2020-08-22 23:04:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-08-22 23:04:20,916 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 329 [2020-08-22 23:04:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:20,918 INFO L225 Difference]: With dead ends: 665 [2020-08-22 23:04:20,918 INFO L226 Difference]: Without dead ends: 353 [2020-08-22 23:04:20,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=505, Invalid=18127, Unknown=0, NotChecked=0, Total=18632 [2020-08-22 23:04:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-08-22 23:04:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 339. [2020-08-22 23:04:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-22 23:04:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2020-08-22 23:04:20,934 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 329 [2020-08-22 23:04:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:20,935 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2020-08-22 23:04:20,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 23:04:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2020-08-22 23:04:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-08-22 23:04:20,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:20,937 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:20,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:04:20,937 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1712315828, now seen corresponding path program 34 times [2020-08-22 23:04:20,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:20,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443765066] [2020-08-22 23:04:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:25,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5085 backedges. 2 proven. 5083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:26,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443765066] [2020-08-22 23:04:26,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:26,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-08-22 23:04:26,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198637485] [2020-08-22 23:04:26,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 23:04:26,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:26,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 23:04:26,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:04:26,023 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand 72 states. [2020-08-22 23:04:39,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:39,518 INFO L93 Difference]: Finished difference Result 683 states and 688 transitions. [2020-08-22 23:04:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-08-22 23:04:39,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 338 [2020-08-22 23:04:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:39,523 INFO L225 Difference]: With dead ends: 683 [2020-08-22 23:04:39,524 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 23:04:39,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=520, Invalid=19220, Unknown=0, NotChecked=0, Total=19740 [2020-08-22 23:04:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 23:04:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 348. [2020-08-22 23:04:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-08-22 23:04:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2020-08-22 23:04:39,541 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 338 [2020-08-22 23:04:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:39,541 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2020-08-22 23:04:39,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 23:04:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2020-08-22 23:04:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-08-22 23:04:39,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:39,544 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:39,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:04:39,544 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1498245079, now seen corresponding path program 35 times [2020-08-22 23:04:39,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:39,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259171013] [2020-08-22 23:04:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5392 backedges. 2 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:45,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259171013] [2020-08-22 23:04:45,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:45,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-08-22 23:04:45,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779240491] [2020-08-22 23:04:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 23:04:45,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 23:04:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 23:04:45,079 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand 74 states. [2020-08-22 23:04:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:58,678 INFO L93 Difference]: Finished difference Result 701 states and 706 transitions. [2020-08-22 23:04:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-08-22 23:04:58,679 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 347 [2020-08-22 23:04:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:58,681 INFO L225 Difference]: With dead ends: 701 [2020-08-22 23:04:58,681 INFO L226 Difference]: Without dead ends: 371 [2020-08-22 23:04:58,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=535, Invalid=20345, Unknown=0, NotChecked=0, Total=20880 [2020-08-22 23:04:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-22 23:04:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2020-08-22 23:04:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-08-22 23:04:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-08-22 23:04:58,696 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-08-22 23:04:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:58,697 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-08-22 23:04:58,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 23:04:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-08-22 23:04:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-08-22 23:04:58,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:58,700 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:58,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:04:58,700 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1212836588, now seen corresponding path program 36 times [2020-08-22 23:04:58,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:58,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079082890] [2020-08-22 23:04:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5708 backedges. 2 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:04,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079082890] [2020-08-22 23:05:04,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:04,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-08-22 23:05:04,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60412578] [2020-08-22 23:05:04,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 23:05:04,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:04,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 23:05:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:05:04,682 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 76 states. [2020-08-22 23:05:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:20,086 INFO L93 Difference]: Finished difference Result 719 states and 724 transitions. [2020-08-22 23:05:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-08-22 23:05:20,087 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 356 [2020-08-22 23:05:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:20,089 INFO L225 Difference]: With dead ends: 719 [2020-08-22 23:05:20,089 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 23:05:20,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=550, Invalid=21502, Unknown=0, NotChecked=0, Total=22052 [2020-08-22 23:05:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 23:05:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2020-08-22 23:05:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-08-22 23:05:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2020-08-22 23:05:20,111 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 356 [2020-08-22 23:05:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:20,111 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2020-08-22 23:05:20,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 23:05:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2020-08-22 23:05:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-08-22 23:05:20,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:20,115 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:20,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:05:20,116 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 749730935, now seen corresponding path program 37 times [2020-08-22 23:05:20,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:20,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830448747] [2020-08-22 23:05:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6033 backedges. 2 proven. 6031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:26,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830448747] [2020-08-22 23:05:26,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:26,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-08-22 23:05:26,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749985521] [2020-08-22 23:05:26,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 23:05:26,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 23:05:26,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 23:05:26,578 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 78 states. [2020-08-22 23:05:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:44,031 INFO L93 Difference]: Finished difference Result 737 states and 742 transitions. [2020-08-22 23:05:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-08-22 23:05:44,032 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 365 [2020-08-22 23:05:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:44,034 INFO L225 Difference]: With dead ends: 737 [2020-08-22 23:05:44,035 INFO L226 Difference]: Without dead ends: 389 [2020-08-22 23:05:44,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=565, Invalid=22691, Unknown=0, NotChecked=0, Total=23256 [2020-08-22 23:05:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-08-22 23:05:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-08-22 23:05:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-08-22 23:05:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2020-08-22 23:05:44,052 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 365 [2020-08-22 23:05:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:44,053 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2020-08-22 23:05:44,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 23:05:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2020-08-22 23:05:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-08-22 23:05:44,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:44,056 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:44,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:05:44,056 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1243597708, now seen corresponding path program 38 times [2020-08-22 23:05:44,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:44,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511673877] [2020-08-22 23:05:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:51,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6367 backedges. 2 proven. 6365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:51,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511673877] [2020-08-22 23:05:51,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:51,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-08-22 23:05:51,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522511389] [2020-08-22 23:05:51,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 23:05:51,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:51,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 23:05:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:05:51,446 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand 80 states. [2020-08-22 23:06:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:12,340 INFO L93 Difference]: Finished difference Result 755 states and 760 transitions. [2020-08-22 23:06:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-08-22 23:06:12,342 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 374 [2020-08-22 23:06:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:12,344 INFO L225 Difference]: With dead ends: 755 [2020-08-22 23:06:12,344 INFO L226 Difference]: Without dead ends: 398 [2020-08-22 23:06:12,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=580, Invalid=23912, Unknown=0, NotChecked=0, Total=24492 [2020-08-22 23:06:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-22 23:06:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2020-08-22 23:06:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 23:06:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2020-08-22 23:06:12,363 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 374 [2020-08-22 23:06:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:12,364 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2020-08-22 23:06:12,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 23:06:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2020-08-22 23:06:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-08-22 23:06:12,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:12,367 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:12,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:06:12,367 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1231902441, now seen corresponding path program 39 times [2020-08-22 23:06:12,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:12,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776607821] [2020-08-22 23:06:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6710 backedges. 2 proven. 6708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:20,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776607821] [2020-08-22 23:06:20,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:20,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-08-22 23:06:20,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517135465] [2020-08-22 23:06:20,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 23:06:20,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 23:06:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 23:06:20,989 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand 82 states. [2020-08-22 23:06:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:46,564 INFO L93 Difference]: Finished difference Result 773 states and 778 transitions. [2020-08-22 23:06:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-08-22 23:06:46,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 383 [2020-08-22 23:06:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:46,568 INFO L225 Difference]: With dead ends: 773 [2020-08-22 23:06:46,568 INFO L226 Difference]: Without dead ends: 407 [2020-08-22 23:06:46,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=595, Invalid=25165, Unknown=0, NotChecked=0, Total=25760 [2020-08-22 23:06:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-22 23:06:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2020-08-22 23:06:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-08-22 23:06:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-08-22 23:06:46,589 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-08-22 23:06:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:46,590 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-08-22 23:06:46,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 23:06:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-08-22 23:06:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-08-22 23:06:46,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:46,593 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:46,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:06:46,594 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash 807779284, now seen corresponding path program 40 times [2020-08-22 23:06:46,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:46,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650742506] [2020-08-22 23:06:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:56,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7062 backedges. 2 proven. 7060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:56,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650742506] [2020-08-22 23:06:56,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:56,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-08-22 23:06:56,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274402181] [2020-08-22 23:06:56,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 23:06:56,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:56,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 23:06:56,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:06:56,962 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 84 states. [2020-08-22 23:07:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:30,461 INFO L93 Difference]: Finished difference Result 791 states and 796 transitions. [2020-08-22 23:07:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-08-22 23:07:30,463 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 392 [2020-08-22 23:07:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:30,466 INFO L225 Difference]: With dead ends: 791 [2020-08-22 23:07:30,466 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 23:07:30,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=610, Invalid=26450, Unknown=0, NotChecked=0, Total=27060 [2020-08-22 23:07:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 23:07:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 402. [2020-08-22 23:07:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-08-22 23:07:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 404 transitions. [2020-08-22 23:07:30,485 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 404 transitions. Word has length 392 [2020-08-22 23:07:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:30,485 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 404 transitions. [2020-08-22 23:07:30,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 23:07:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 404 transitions. [2020-08-22 23:07:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-08-22 23:07:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:30,489 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:30,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:07:30,489 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1344236983, now seen corresponding path program 41 times [2020-08-22 23:07:30,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:30,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744176411] [2020-08-22 23:07:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:42,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 2 proven. 7421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:42,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744176411] [2020-08-22 23:07:42,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:42,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-08-22 23:07:42,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782613537] [2020-08-22 23:07:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 23:07:42,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 23:07:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 23:07:42,645 INFO L87 Difference]: Start difference. First operand 402 states and 404 transitions. Second operand 86 states. [2020-08-22 23:08:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:25,203 INFO L93 Difference]: Finished difference Result 809 states and 814 transitions. [2020-08-22 23:08:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-08-22 23:08:25,206 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 401 [2020-08-22 23:08:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:25,209 INFO L225 Difference]: With dead ends: 809 [2020-08-22 23:08:25,209 INFO L226 Difference]: Without dead ends: 425 [2020-08-22 23:08:25,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=625, Invalid=27767, Unknown=0, NotChecked=0, Total=28392 [2020-08-22 23:08:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-08-22 23:08:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 411. [2020-08-22 23:08:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-08-22 23:08:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2020-08-22 23:08:25,229 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 401 [2020-08-22 23:08:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:25,230 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2020-08-22 23:08:25,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 23:08:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2020-08-22 23:08:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-08-22 23:08:25,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:25,234 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:25,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:08:25,234 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2090609460, now seen corresponding path program 42 times [2020-08-22 23:08:25,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:25,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294384162] [2020-08-22 23:08:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7793 backedges. 2 proven. 7791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:41,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294384162] [2020-08-22 23:08:41,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:41,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-08-22 23:08:41,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872452201] [2020-08-22 23:08:41,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 23:08:41,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:41,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 23:08:41,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:08:41,248 INFO L87 Difference]: Start difference. First operand 411 states and 413 transitions. Second operand 88 states. [2020-08-22 23:09:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:35,797 INFO L93 Difference]: Finished difference Result 827 states and 832 transitions. [2020-08-22 23:09:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-08-22 23:09:35,801 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 410 [2020-08-22 23:09:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:35,803 INFO L225 Difference]: With dead ends: 827 [2020-08-22 23:09:35,803 INFO L226 Difference]: Without dead ends: 434 [2020-08-22 23:09:35,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=640, Invalid=29116, Unknown=0, NotChecked=0, Total=29756 [2020-08-22 23:09:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-22 23:09:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-08-22 23:09:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-08-22 23:09:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-08-22 23:09:35,826 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-08-22 23:09:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:35,827 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-08-22 23:09:35,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 23:09:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-08-22 23:09:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-08-22 23:09:35,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:35,831 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:35,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:09:35,831 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash 469781079, now seen corresponding path program 43 times [2020-08-22 23:09:35,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:35,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747270406] [2020-08-22 23:09:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8172 backedges. 2 proven. 8170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:54,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747270406] [2020-08-22 23:09:54,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:54,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-08-22 23:09:54,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752587396] [2020-08-22 23:09:54,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 23:09:54,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 23:09:54,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 23:09:54,388 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 90 states. [2020-08-22 23:11:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:04,506 INFO L93 Difference]: Finished difference Result 845 states and 850 transitions. [2020-08-22 23:11:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-08-22 23:11:04,513 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 419 [2020-08-22 23:11:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:04,515 INFO L225 Difference]: With dead ends: 845 [2020-08-22 23:11:04,515 INFO L226 Difference]: Without dead ends: 443 [2020-08-22 23:11:04,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=655, Invalid=30497, Unknown=0, NotChecked=0, Total=31152 [2020-08-22 23:11:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-08-22 23:11:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 429. [2020-08-22 23:11:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-08-22 23:11:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 431 transitions. [2020-08-22 23:11:04,534 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 431 transitions. Word has length 419 [2020-08-22 23:11:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:04,535 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 431 transitions. [2020-08-22 23:11:04,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 23:11:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 431 transitions. [2020-08-22 23:11:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-08-22 23:11:04,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:04,541 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:04,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:11:04,541 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -673611116, now seen corresponding path program 44 times [2020-08-22 23:11:04,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:04,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482364956] [2020-08-22 23:11:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:26,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8560 backedges. 2 proven. 8558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:26,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482364956] [2020-08-22 23:11:26,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:26,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-08-22 23:11:26,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629961863] [2020-08-22 23:11:26,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 23:11:26,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 23:11:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:11:26,271 INFO L87 Difference]: Start difference. First operand 429 states and 431 transitions. Second operand 92 states. [2020-08-22 23:12:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:50,144 INFO L93 Difference]: Finished difference Result 863 states and 868 transitions. [2020-08-22 23:12:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-08-22 23:12:50,151 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 428 [2020-08-22 23:12:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:50,155 INFO L225 Difference]: With dead ends: 863 [2020-08-22 23:12:50,156 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 23:12:50,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=670, Invalid=31910, Unknown=0, NotChecked=0, Total=32580 [2020-08-22 23:12:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 23:12:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 23:12:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 23:12:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 440 transitions. [2020-08-22 23:12:50,185 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 440 transitions. Word has length 428 [2020-08-22 23:12:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:50,187 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 440 transitions. [2020-08-22 23:12:50,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 23:12:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 440 transitions. [2020-08-22 23:12:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-08-22 23:12:50,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:50,193 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:50,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:12:50,193 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1503707401, now seen corresponding path program 45 times [2020-08-22 23:12:50,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:50,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407992802] [2020-08-22 23:12:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:11,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8957 backedges. 2 proven. 8955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:13:12,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407992802] [2020-08-22 23:13:12,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:12,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-08-22 23:13:12,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685092577] [2020-08-22 23:13:12,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 23:13:12,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:12,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 23:13:12,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 23:13:12,165 INFO L87 Difference]: Start difference. First operand 438 states and 440 transitions. Second operand 94 states. [2020-08-22 23:14:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:23,463 INFO L93 Difference]: Finished difference Result 881 states and 886 transitions. [2020-08-22 23:14:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-08-22 23:14:23,466 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 437 [2020-08-22 23:14:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:23,469 INFO L225 Difference]: With dead ends: 881 [2020-08-22 23:14:23,469 INFO L226 Difference]: Without dead ends: 461 [2020-08-22 23:14:23,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=685, Invalid=33355, Unknown=0, NotChecked=0, Total=34040 [2020-08-22 23:14:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-08-22 23:14:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-08-22 23:14:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-08-22 23:14:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 449 transitions. [2020-08-22 23:14:23,486 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 449 transitions. Word has length 437 [2020-08-22 23:14:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:23,487 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 449 transitions. [2020-08-22 23:14:23,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 23:14:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 449 transitions. [2020-08-22 23:14:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-08-22 23:14:23,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:23,491 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:23,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:14:23,492 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash -990658060, now seen corresponding path program 46 times [2020-08-22 23:14:23,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:23,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837686191] [2020-08-22 23:14:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat