/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:18:00,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:18:00,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:18:00,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 20:18:00,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:18:00,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:18:00,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:18:00,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:18:00,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:18:00,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:18:00,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:18:00,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:18:00,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:18:00,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:18:00,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:18:00,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:18:00,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:18:00,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:18:00,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:18:00,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:18:00,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 20:18:00,691 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:18:00,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:18:00,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:18:00,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:18:00,693 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:18:00,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:18:00,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:18:00,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:18:00,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:18:00,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:18:00,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:18:00,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:18:00,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:18:00,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:18:00,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:18:00,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:18:00,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:18:00,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:18:00,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:18:00,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:18:00,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:18:00,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:00,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:18:00,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:18:00,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:18:00,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:18:00,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:18:00,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:18:00,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:18:00,992 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:18:00,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 20:18:01,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/955f6d03c/4cac200486ca4836820be1520f8835d4/FLAG34c4b1be7 [2020-08-18 20:18:01,443 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:18:01,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-18 20:18:01,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/955f6d03c/4cac200486ca4836820be1520f8835d4/FLAG34c4b1be7 [2020-08-18 20:18:01,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/955f6d03c/4cac200486ca4836820be1520f8835d4 [2020-08-18 20:18:01,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:18:01,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:18:01,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:01,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:18:01,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:18:01,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:01" (1/1) ... [2020-08-18 20:18:01,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:01, skipping insertion in model container [2020-08-18 20:18:01,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:01" (1/1) ... [2020-08-18 20:18:01,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:18:01,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:18:02,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:02,105 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:18:02,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:02,129 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:18:02,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02 WrapperNode [2020-08-18 20:18:02,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:02,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:18:02,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:18:02,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:18:02,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... [2020-08-18 20:18:02,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:18:02,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:18:02,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:18:02,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:18:02,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 20:18:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:18:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:18:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-18 20:18:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:18:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:18:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-18 20:18:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:18:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:18:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:18:02,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:18:02,474 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:18:02,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:02 BoogieIcfgContainer [2020-08-18 20:18:02,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:18:02,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:18:02,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:18:02,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:18:02,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:18:01" (1/3) ... [2020-08-18 20:18:02,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1014b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:02, skipping insertion in model container [2020-08-18 20:18:02,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:02" (2/3) ... [2020-08-18 20:18:02,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1014b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:02, skipping insertion in model container [2020-08-18 20:18:02,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:02" (3/3) ... [2020-08-18 20:18:02,487 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-08-18 20:18:02,497 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:18:02,504 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:18:02,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:18:02,541 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:18:02,541 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:18:02,541 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:18:02,541 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:18:02,542 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:18:02,542 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:18:02,542 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:18:02,542 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:18:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 20:18:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 20:18:02,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:02,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:02,570 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-18 20:18:02,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:02,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996715557] [2020-08-18 20:18:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:02,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:02,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:02,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996715557] [2020-08-18 20:18:02,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:02,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:18:02,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369598507] [2020-08-18 20:18:02,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:18:02,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:18:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:18:02,831 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 20:18:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:02,950 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 20:18:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:18:02,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 20:18:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:02,961 INFO L225 Difference]: With dead ends: 30 [2020-08-18 20:18:02,962 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 20:18:02,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:18:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 20:18:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 20:18:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 20:18:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 20:18:03,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 20:18:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:03,015 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 20:18:03,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:18:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 20:18:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 20:18:03,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:03,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:03,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:18:03,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-18 20:18:03,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:03,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966334850] [2020-08-18 20:18:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 20:18:03,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966334850] [2020-08-18 20:18:03,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:03,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:18:03,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84138469] [2020-08-18 20:18:03,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:18:03,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:18:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:18:03,176 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 20:18:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:03,255 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 20:18:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:18:03,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 20:18:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:03,258 INFO L225 Difference]: With dead ends: 25 [2020-08-18 20:18:03,258 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 20:18:03,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:18:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 20:18:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 20:18:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 20:18:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 20:18:03,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 20:18:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:03,269 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 20:18:03,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:18:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 20:18:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:03,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:03,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:03,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:18:03,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-18 20:18:03,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:03,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883096380] [2020-08-18 20:18:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 20:18:03,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883096380] [2020-08-18 20:18:03,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:03,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:18:03,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609202659] [2020-08-18 20:18:03,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:18:03,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:18:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:18:03,460 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 20:18:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:03,528 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 20:18:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:18:03,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 20:18:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:03,530 INFO L225 Difference]: With dead ends: 28 [2020-08-18 20:18:03,530 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 20:18:03,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:18:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 20:18:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 20:18:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 20:18:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 20:18:03,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 20:18:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:03,540 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 20:18:03,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:18:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 20:18:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 20:18:03,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:03,542 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:03,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:18:03,543 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-18 20:18:03,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:03,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236035652] [2020-08-18 20:18:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 20:18:03,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236035652] [2020-08-18 20:18:03,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:03,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:18:03,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832551475] [2020-08-18 20:18:03,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:18:03,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:18:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:18:03,723 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 20:18:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:03,818 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 20:18:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:18:03,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 20:18:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:03,820 INFO L225 Difference]: With dead ends: 31 [2020-08-18 20:18:03,820 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 20:18:03,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:18:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 20:18:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 20:18:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 20:18:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 20:18:03,828 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 20:18:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:03,829 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 20:18:03,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:18:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 20:18:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 20:18:03,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:03,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:03,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:18:03,831 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:03,832 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-18 20:18:03,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:03,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436692444] [2020-08-18 20:18:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:03,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 20:18:04,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436692444] [2020-08-18 20:18:04,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:04,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 20:18:04,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588895301] [2020-08-18 20:18:04,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:18:04,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:04,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:18:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:18:04,055 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 20:18:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:04,142 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 20:18:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:18:04,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 20:18:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:04,144 INFO L225 Difference]: With dead ends: 34 [2020-08-18 20:18:04,144 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 20:18:04,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:18:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 20:18:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 20:18:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 20:18:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 20:18:04,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 20:18:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:04,152 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 20:18:04,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:18:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 20:18:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 20:18:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:04,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:04,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:18:04,155 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-18 20:18:04,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:04,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203005549] [2020-08-18 20:18:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 20:18:04,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203005549] [2020-08-18 20:18:04,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:04,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:18:04,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595890283] [2020-08-18 20:18:04,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:18:04,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:04,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:18:04,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:18:04,331 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 20:18:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:04,435 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 20:18:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:18:04,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 20:18:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:04,437 INFO L225 Difference]: With dead ends: 37 [2020-08-18 20:18:04,437 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 20:18:04,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:18:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 20:18:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 20:18:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 20:18:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 20:18:04,445 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 20:18:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:04,446 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 20:18:04,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:18:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 20:18:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 20:18:04,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:04,448 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:04,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:18:04,448 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-18 20:18:04,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:04,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958129067] [2020-08-18 20:18:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 20:18:04,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958129067] [2020-08-18 20:18:04,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:04,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 20:18:04,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526578951] [2020-08-18 20:18:04,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:18:04,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:04,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:18:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:18:04,672 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 20:18:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:04,784 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 20:18:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:18:04,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 20:18:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:04,786 INFO L225 Difference]: With dead ends: 40 [2020-08-18 20:18:04,786 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 20:18:04,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:18:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 20:18:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 20:18:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 20:18:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 20:18:04,794 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 20:18:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:04,795 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 20:18:04,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:18:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 20:18:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 20:18:04,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:04,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:04,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:18:04,797 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-18 20:18:04,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:04,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484209776] [2020-08-18 20:18:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:04,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 20:18:05,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484209776] [2020-08-18 20:18:05,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:05,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 20:18:05,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368396594] [2020-08-18 20:18:05,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 20:18:05,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 20:18:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:18:05,036 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 20:18:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:05,184 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 20:18:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:18:05,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 20:18:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:05,186 INFO L225 Difference]: With dead ends: 43 [2020-08-18 20:18:05,186 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 20:18:05,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 20:18:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 20:18:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 20:18:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 20:18:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 20:18:05,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 20:18:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:05,195 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 20:18:05,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 20:18:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 20:18:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:18:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:05,196 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:05,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:18:05,197 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-18 20:18:05,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:05,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973579998] [2020-08-18 20:18:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 20:18:05,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973579998] [2020-08-18 20:18:05,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:05,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 20:18:05,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540919341] [2020-08-18 20:18:05,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 20:18:05,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:05,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 20:18:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:18:05,469 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 20:18:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:05,595 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 20:18:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 20:18:05,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 20:18:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:05,597 INFO L225 Difference]: With dead ends: 46 [2020-08-18 20:18:05,597 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 20:18:05,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 20:18:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 20:18:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 20:18:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 20:18:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 20:18:05,605 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 20:18:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:05,605 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 20:18:05,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 20:18:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 20:18:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 20:18:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:05,607 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:05,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:18:05,607 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:05,608 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-18 20:18:05,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:05,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889136485] [2020-08-18 20:18:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 20:18:05,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889136485] [2020-08-18 20:18:05,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:05,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 20:18:05,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520083800] [2020-08-18 20:18:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 20:18:05,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 20:18:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:18:05,933 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 20:18:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:06,079 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 20:18:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 20:18:06,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 20:18:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:06,081 INFO L225 Difference]: With dead ends: 49 [2020-08-18 20:18:06,081 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 20:18:06,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 20:18:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 20:18:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 20:18:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 20:18:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 20:18:06,088 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 20:18:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:06,089 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 20:18:06,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 20:18:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 20:18:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 20:18:06,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:06,090 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:06,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:18:06,091 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-18 20:18:06,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:06,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620773617] [2020-08-18 20:18:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-18 20:18:06,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620773617] [2020-08-18 20:18:06,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:06,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 20:18:06,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159226934] [2020-08-18 20:18:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 20:18:06,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 20:18:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:18:06,476 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-18 20:18:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:06,623 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-18 20:18:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 20:18:06,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-18 20:18:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:06,625 INFO L225 Difference]: With dead ends: 52 [2020-08-18 20:18:06,626 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 20:18:06,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-18 20:18:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 20:18:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-18 20:18:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 20:18:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-18 20:18:06,632 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-18 20:18:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:06,633 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-18 20:18:06,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 20:18:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-18 20:18:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 20:18:06,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:06,634 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:06,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:18:06,635 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-18 20:18:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:06,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421713250] [2020-08-18 20:18:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-18 20:18:07,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421713250] [2020-08-18 20:18:07,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:07,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 20:18:07,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596934893] [2020-08-18 20:18:07,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 20:18:07,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:07,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 20:18:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:18:07,193 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-18 20:18:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:07,396 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-18 20:18:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 20:18:07,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-18 20:18:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:07,398 INFO L225 Difference]: With dead ends: 55 [2020-08-18 20:18:07,398 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 20:18:07,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-18 20:18:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 20:18:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-18 20:18:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 20:18:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 20:18:07,409 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-18 20:18:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:07,413 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 20:18:07,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 20:18:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 20:18:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 20:18:07,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:07,416 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:07,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:18:07,416 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-18 20:18:07,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:07,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321595528] [2020-08-18 20:18:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:07,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-18 20:18:08,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321595528] [2020-08-18 20:18:08,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:08,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 20:18:08,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174109732] [2020-08-18 20:18:08,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 20:18:08,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 20:18:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 20:18:08,026 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-18 20:18:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:08,275 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-18 20:18:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 20:18:08,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 20:18:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:08,280 INFO L225 Difference]: With dead ends: 58 [2020-08-18 20:18:08,280 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 20:18:08,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-18 20:18:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 20:18:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 20:18:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 20:18:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-18 20:18:08,297 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-18 20:18:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:08,298 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-18 20:18:08,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 20:18:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-18 20:18:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 20:18:08,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:08,302 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:08,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:18:08,302 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-18 20:18:08,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:08,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931525057] [2020-08-18 20:18:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-18 20:18:09,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931525057] [2020-08-18 20:18:09,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:09,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 20:18:09,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361843529] [2020-08-18 20:18:09,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 20:18:09,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 20:18:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:18:09,032 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-18 20:18:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:09,239 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-18 20:18:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 20:18:09,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-18 20:18:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:09,240 INFO L225 Difference]: With dead ends: 61 [2020-08-18 20:18:09,240 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 20:18:09,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-18 20:18:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 20:18:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-18 20:18:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 20:18:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 20:18:09,247 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-18 20:18:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:09,248 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 20:18:09,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 20:18:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 20:18:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 20:18:09,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:09,249 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:09,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:18:09,250 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-18 20:18:09,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:09,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660359904] [2020-08-18 20:18:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-18 20:18:09,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660359904] [2020-08-18 20:18:09,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:09,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 20:18:09,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489497727] [2020-08-18 20:18:09,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 20:18:09,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:09,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 20:18:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 20:18:09,944 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-18 20:18:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:10,148 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-18 20:18:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 20:18:10,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 20:18:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:10,149 INFO L225 Difference]: With dead ends: 64 [2020-08-18 20:18:10,149 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 20:18:10,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 20:18:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 20:18:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-18 20:18:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 20:18:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-18 20:18:10,156 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-18 20:18:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:10,156 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-18 20:18:10,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 20:18:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-18 20:18:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 20:18:10,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:10,158 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:10,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 20:18:10,158 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-18 20:18:10,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:10,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619362963] [2020-08-18 20:18:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-18 20:18:10,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619362963] [2020-08-18 20:18:10,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:10,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 20:18:10,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808005873] [2020-08-18 20:18:10,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 20:18:10,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 20:18:10,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 20:18:10,810 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-18 20:18:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:11,044 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-18 20:18:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 20:18:11,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-18 20:18:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:11,046 INFO L225 Difference]: With dead ends: 67 [2020-08-18 20:18:11,046 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 20:18:11,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 20:18:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 20:18:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 20:18:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 20:18:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-18 20:18:11,052 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-18 20:18:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:11,053 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-18 20:18:11,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 20:18:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-18 20:18:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 20:18:11,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:11,054 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:11,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 20:18:11,055 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-18 20:18:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:11,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509189627] [2020-08-18 20:18:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-18 20:18:11,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509189627] [2020-08-18 20:18:11,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:11,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 20:18:11,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508786612] [2020-08-18 20:18:11,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 20:18:11,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 20:18:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 20:18:11,861 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-18 20:18:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:12,163 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-18 20:18:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 20:18:12,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-18 20:18:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:12,166 INFO L225 Difference]: With dead ends: 70 [2020-08-18 20:18:12,167 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 20:18:12,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 20:18:12,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 20:18:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-18 20:18:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 20:18:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-18 20:18:12,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-18 20:18:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:12,177 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-18 20:18:12,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 20:18:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-18 20:18:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 20:18:12,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:12,180 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:12,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 20:18:12,180 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:12,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-18 20:18:12,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:12,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573420190] [2020-08-18 20:18:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:12,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-18 20:18:13,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573420190] [2020-08-18 20:18:13,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:13,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 20:18:13,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313934146] [2020-08-18 20:18:13,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 20:18:13,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 20:18:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 20:18:13,025 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-18 20:18:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:13,312 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-18 20:18:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 20:18:13,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-18 20:18:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:13,314 INFO L225 Difference]: With dead ends: 73 [2020-08-18 20:18:13,314 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 20:18:13,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 20:18:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 20:18:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-18 20:18:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 20:18:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-18 20:18:13,323 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-18 20:18:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:13,324 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-18 20:18:13,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 20:18:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-18 20:18:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 20:18:13,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:13,326 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:13,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 20:18:13,327 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-18 20:18:13,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:13,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168970858] [2020-08-18 20:18:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-18 20:18:14,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168970858] [2020-08-18 20:18:14,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:14,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 20:18:14,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440094107] [2020-08-18 20:18:14,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 20:18:14,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 20:18:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 20:18:14,269 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-18 20:18:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:14,549 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-18 20:18:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 20:18:14,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-18 20:18:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:14,551 INFO L225 Difference]: With dead ends: 76 [2020-08-18 20:18:14,551 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 20:18:14,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 20:18:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 20:18:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-18 20:18:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 20:18:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-18 20:18:14,557 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-18 20:18:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:14,557 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-18 20:18:14,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 20:18:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-18 20:18:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 20:18:14,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:14,559 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:14,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 20:18:14,559 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-18 20:18:14,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:14,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271797002] [2020-08-18 20:18:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:14,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-18 20:18:15,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271797002] [2020-08-18 20:18:15,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:15,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 20:18:15,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503618377] [2020-08-18 20:18:15,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 20:18:15,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 20:18:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 20:18:15,791 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-18 20:18:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:16,144 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-18 20:18:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 20:18:16,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-18 20:18:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:16,145 INFO L225 Difference]: With dead ends: 79 [2020-08-18 20:18:16,145 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 20:18:16,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 20:18:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 20:18:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-18 20:18:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 20:18:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-18 20:18:16,153 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-18 20:18:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:16,153 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-18 20:18:16,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 20:18:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-18 20:18:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-18 20:18:16,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:16,155 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:16,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 20:18:16,156 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:16,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-18 20:18:16,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:16,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70628349] [2020-08-18 20:18:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:16,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-08-18 20:18:17,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70628349] [2020-08-18 20:18:17,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:17,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:18:17,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927236660] [2020-08-18 20:18:17,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:18:17,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:18:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:18:17,604 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 8 states. [2020-08-18 20:18:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:17,699 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-08-18 20:18:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:18:17,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-08-18 20:18:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:17,700 INFO L225 Difference]: With dead ends: 75 [2020-08-18 20:18:17,700 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:18:17,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:18:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:18:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:18:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:18:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:18:17,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-08-18 20:18:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:17,702 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:18:17,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:18:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:18:17,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:18:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 20:18:17,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:18:17,739 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:18:17,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:17,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:17,739 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:18:17,739 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:18:17,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:18:17,739 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-18 20:18:17,740 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-18 20:18:17,740 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-18 20:18:17,740 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-18 20:18:17,740 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-18 20:18:17,740 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-18 20:18:17,740 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-18 20:18:17,740 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-18 20:18:17,741 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-18 20:18:17,741 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-18 20:18:17,741 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-18 20:18:17,741 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2020-08-18 20:18:17,741 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-18 20:18:17,741 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-18 20:18:17,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:18:17 BoogieIcfgContainer [2020-08-18 20:18:17,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:18:17,766 INFO L168 Benchmark]: Toolchain (without parser) took 15941.04 ms. Allocated memory was 141.6 MB in the beginning and 474.5 MB in the end (delta: 332.9 MB). Free memory was 105.2 MB in the beginning and 207.4 MB in the end (delta: -102.2 MB). Peak memory consumption was 230.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,767 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.73 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,771 INFO L168 Benchmark]: Boogie Preprocessor took 23.49 ms. Allocated memory is still 141.6 MB. Free memory was 95.7 MB in the beginning and 94.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,772 INFO L168 Benchmark]: RCFGBuilder took 324.05 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 173.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,776 INFO L168 Benchmark]: TraceAbstraction took 15279.74 ms. Allocated memory was 205.0 MB in the beginning and 474.5 MB in the end (delta: 269.5 MB). Free memory was 172.4 MB in the beginning and 207.4 MB in the end (delta: -35.0 MB). Peak memory consumption was 234.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:17,782 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.73 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.49 ms. Allocated memory is still 141.6 MB. Free memory was 95.7 MB in the beginning and 94.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.05 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 173.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15279.74 ms. Allocated memory was 205.0 MB in the beginning and 474.5 MB in the end (delta: 269.5 MB). Free memory was 172.4 MB in the beginning and 207.4 MB in the end (delta: -35.0 MB). Peak memory consumption was 234.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.1s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 525 SDslu, 1157 SDs, 0 SdLazy, 853 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1034 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 1533 NumberOfCodeBlocks, 1533 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1512 ConstructedInterpolants, 0 QuantifiedInterpolants, 435840 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5020/8820 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...