/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 14:55:22,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:55:22,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:55:22,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 14:55:22,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:55:22,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:55:22,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:55:22,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:55:22,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:55:22,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:55:22,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:55:22,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:55:22,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:55:22,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:55:22,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:55:22,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:55:22,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:55:22,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:55:22,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:55:22,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:55:22,914 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 [2020-08-21 14:55:22,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:55:22,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:55:22,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:55:22,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:55:22,945 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:55:22,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:55:22,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:55:22,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:55:22,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:55:22,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:55:22,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:55:22,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:55:22,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:55:22,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:55:22,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:55:22,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:55:22,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:55:22,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:55:22,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:55:22,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:55:22,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:55:22,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:55:22,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:55:22,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:55:22,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:55:22,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:55:22,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:55:22,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:55:22,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:55:22,954 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:55:23,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:55:23,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:55:23,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:55:23,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:55:23,304 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:55:23,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-21 14:55:23,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f10fc6028/83d60fcc2ebe4bccaae7cd5ea003d3a5/FLAG129865db5 [2020-08-21 14:55:23,837 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:55:23,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-21 14:55:23,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f10fc6028/83d60fcc2ebe4bccaae7cd5ea003d3a5/FLAG129865db5 [2020-08-21 14:55:24,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f10fc6028/83d60fcc2ebe4bccaae7cd5ea003d3a5 [2020-08-21 14:55:24,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:55:24,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:55:24,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:24,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:55:24,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:55:24,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e6ef35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24, skipping insertion in model container [2020-08-21 14:55:24,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:55:24,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:55:24,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:24,510 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:55:24,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:24,540 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:55:24,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24 WrapperNode [2020-08-21 14:55:24,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:24,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:55:24,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:55:24,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:55:24,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (1/1) ... [2020-08-21 14:55:24,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:55:24,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:55:24,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:55:24,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:55:24,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (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 [2020-08-21 14:55:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:55:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:55:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 14:55:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:55:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:55:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 14:55:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:55:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:55:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:55:24,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:55:24,902 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:55:24,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:24 BoogieIcfgContainer [2020-08-21 14:55:24,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:55:24,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:55:24,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:55:24,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:55:24,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:55:24" (1/3) ... [2020-08-21 14:55:24,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e663c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:24, skipping insertion in model container [2020-08-21 14:55:24,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:24" (2/3) ... [2020-08-21 14:55:24,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e663c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:24, skipping insertion in model container [2020-08-21 14:55:24,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:24" (3/3) ... [2020-08-21 14:55:24,915 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-08-21 14:55:24,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:55:24,932 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:55:24,947 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:55:24,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:55:24,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:55:24,973 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:55:24,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:55:24,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:55:24,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:55:24,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:55:24,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:55:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 14:55:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:55:24,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:24,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:24,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:25,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 14:55:25,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:25,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297094543] [2020-08-21 14:55:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:25,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297094543] [2020-08-21 14:55:25,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:25,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:55:25,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911236213] [2020-08-21 14:55:25,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:55:25,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:55:25,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:55:25,277 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 14:55:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:25,419 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 14:55:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:55:25,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:55:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:25,433 INFO L225 Difference]: With dead ends: 30 [2020-08-21 14:55:25,434 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 14:55:25,437 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 [2020-08-21 14:55:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 14:55:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 14:55:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 14:55:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 14:55:25,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 14:55:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:25,478 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 14:55:25,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:55:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 14:55:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:55:25,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:25,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:25,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:55:25,482 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 14:55:25,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:25,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761322979] [2020-08-21 14:55:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:55:25,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761322979] [2020-08-21 14:55:25,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:25,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:55:25,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549582752] [2020-08-21 14:55:25,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:55:25,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:55:25,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:55:25,628 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 14:55:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:25,694 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 14:55:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:55:25,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 14:55:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:25,696 INFO L225 Difference]: With dead ends: 25 [2020-08-21 14:55:25,696 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 14:55:25,698 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 [2020-08-21 14:55:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 14:55:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 14:55:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 14:55:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 14:55:25,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 14:55:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:25,706 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 14:55:25,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:55:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 14:55:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:55:25,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:25,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:25,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:55:25,708 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 14:55:25,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:25,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919681610] [2020-08-21 14:55:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 14:55:25,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919681610] [2020-08-21 14:55:25,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:25,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:55:25,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562625976] [2020-08-21 14:55:25,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:55:25,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:55:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:55:25,899 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 14:55:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:25,969 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 14:55:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:55:25,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 14:55:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:25,971 INFO L225 Difference]: With dead ends: 28 [2020-08-21 14:55:25,972 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 14:55:25,973 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 [2020-08-21 14:55:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 14:55:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 14:55:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 14:55:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 14:55:25,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 14:55:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:25,981 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 14:55:25,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:55:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 14:55:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:55:25,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:25,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:25,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:55:25,989 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 14:55:25,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:25,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23275153] [2020-08-21 14:55:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 14:55:26,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23275153] [2020-08-21 14:55:26,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:26,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:55:26,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657676200] [2020-08-21 14:55:26,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:55:26,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:55:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:55:26,215 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 14:55:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:26,309 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 14:55:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:55:26,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 14:55:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:26,311 INFO L225 Difference]: With dead ends: 31 [2020-08-21 14:55:26,311 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 14:55:26,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:55:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 14:55:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 14:55:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 14:55:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 14:55:26,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 14:55:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:26,319 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 14:55:26,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:55:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 14:55:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 14:55:26,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:26,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:26,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:55:26,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:26,322 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 14:55:26,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:26,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129057979] [2020-08-21 14:55:26,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 14:55:26,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129057979] [2020-08-21 14:55:26,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:26,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:55:26,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206069771] [2020-08-21 14:55:26,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:55:26,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:55:26,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:55:26,512 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 14:55:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:26,606 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 14:55:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:55:26,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 14:55:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:26,608 INFO L225 Difference]: With dead ends: 34 [2020-08-21 14:55:26,608 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 14:55:26,609 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 [2020-08-21 14:55:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 14:55:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 14:55:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:55:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 14:55:26,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 14:55:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:26,616 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 14:55:26,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:55:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 14:55:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 14:55:26,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:26,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:26,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:55:26,619 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:26,619 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 14:55:26,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:26,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652730943] [2020-08-21 14:55:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 14:55:26,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652730943] [2020-08-21 14:55:26,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:26,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:55:26,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5101355] [2020-08-21 14:55:26,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:55:26,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:55:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:55:26,822 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 14:55:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:26,920 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 14:55:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:55:26,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 14:55:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:26,922 INFO L225 Difference]: With dead ends: 37 [2020-08-21 14:55:26,922 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 14:55:26,923 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 [2020-08-21 14:55:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 14:55:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 14:55:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 14:55:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 14:55:26,930 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 14:55:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:26,931 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 14:55:26,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:55:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 14:55:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 14:55:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:26,933 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:26,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:55:26,933 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 14:55:26,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:26,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394169717] [2020-08-21 14:55:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:26,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 14:55:27,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394169717] [2020-08-21 14:55:27,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:27,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:55:27,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869070098] [2020-08-21 14:55:27,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:55:27,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:55:27,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:55:27,173 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 14:55:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:27,312 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 14:55:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:55:27,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 14:55:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:27,314 INFO L225 Difference]: With dead ends: 40 [2020-08-21 14:55:27,315 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 14:55:27,316 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 [2020-08-21 14:55:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 14:55:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 14:55:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 14:55:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 14:55:27,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 14:55:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:27,324 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 14:55:27,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:55:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 14:55:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:55:27,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:27,325 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:27,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:55:27,326 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 14:55:27,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:27,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101757861] [2020-08-21 14:55:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 14:55:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101757861] [2020-08-21 14:55:27,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:27,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:55:27,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896139529] [2020-08-21 14:55:27,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:55:27,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:55:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:55:27,588 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 14:55:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:27,718 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 14:55:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:55:27,719 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 14:55:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:27,720 INFO L225 Difference]: With dead ends: 43 [2020-08-21 14:55:27,720 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 14:55:27,721 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 [2020-08-21 14:55:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 14:55:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 14:55:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 14:55:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 14:55:27,728 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 14:55:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:27,728 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 14:55:27,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:55:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 14:55:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:55:27,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:27,730 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:27,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:55:27,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 14:55:27,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:27,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033346418] [2020-08-21 14:55:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:27,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 14:55:28,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033346418] [2020-08-21 14:55:28,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:28,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:55:28,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040648400] [2020-08-21 14:55:28,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:55:28,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:55:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:55:28,029 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 14:55:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:28,155 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 14:55:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:55:28,155 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 14:55:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:28,157 INFO L225 Difference]: With dead ends: 46 [2020-08-21 14:55:28,157 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:55:28,158 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 [2020-08-21 14:55:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:55:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 14:55:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:55:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 14:55:28,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 14:55:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:28,165 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 14:55:28,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:55:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 14:55:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 14:55:28,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:28,167 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:28,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:55:28,167 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 14:55:28,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:28,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681215103] [2020-08-21 14:55:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 14:55:28,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681215103] [2020-08-21 14:55:28,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:28,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:55:28,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306187052] [2020-08-21 14:55:28,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:55:28,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:55:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:55:28,514 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 14:55:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:28,662 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 14:55:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:55:28,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 14:55:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:28,664 INFO L225 Difference]: With dead ends: 49 [2020-08-21 14:55:28,664 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 14:55:28,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:55:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 14:55:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 14:55:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 14:55:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 14:55:28,671 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 14:55:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:28,671 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 14:55:28,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:55:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 14:55:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 14:55:28,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:28,673 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:28,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:55:28,673 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 14:55:28,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:28,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150197281] [2020-08-21 14:55:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:28,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 14:55:29,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150197281] [2020-08-21 14:55:29,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:29,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:55:29,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539788344] [2020-08-21 14:55:29,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:55:29,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:55:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:55:29,023 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 14:55:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:29,191 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 14:55:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:55:29,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 14:55:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:29,194 INFO L225 Difference]: With dead ends: 52 [2020-08-21 14:55:29,195 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:55:29,196 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 [2020-08-21 14:55:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:55:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 14:55:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 14:55:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 14:55:29,203 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 14:55:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:29,204 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 14:55:29,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:55:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 14:55:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 14:55:29,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:29,206 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:29,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:55:29,207 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-21 14:55:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:29,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834371455] [2020-08-21 14:55:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 14:55:29,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834371455] [2020-08-21 14:55:29,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:29,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:55:29,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054996247] [2020-08-21 14:55:29,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:55:29,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:55:29,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:55:29,730 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 14:55:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:29,920 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 14:55:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:55:29,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 14:55:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:29,922 INFO L225 Difference]: With dead ends: 55 [2020-08-21 14:55:29,922 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 14:55:29,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:55:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 14:55:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 14:55:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 14:55:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 14:55:29,930 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 14:55:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:29,930 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 14:55:29,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:55:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 14:55:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 14:55:29,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:29,931 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:29,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:55:29,932 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-21 14:55:29,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:29,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642257858] [2020-08-21 14:55:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 14:55:30,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642257858] [2020-08-21 14:55:30,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:30,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 14:55:30,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174616885] [2020-08-21 14:55:30,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 14:55:30,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 14:55:30,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:55:30,567 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 14:55:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:30,766 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 14:55:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:55:30,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 14:55:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:30,768 INFO L225 Difference]: With dead ends: 58 [2020-08-21 14:55:30,768 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 14:55:30,769 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 [2020-08-21 14:55:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 14:55:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 14:55:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 14:55:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 14:55:30,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 14:55:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:30,780 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 14:55:30,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 14:55:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 14:55:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 14:55:30,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:30,782 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:30,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:55:30,782 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-21 14:55:30,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:30,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017386275] [2020-08-21 14:55:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:30,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 14:55:31,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017386275] [2020-08-21 14:55:31,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:31,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:55:31,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130798722] [2020-08-21 14:55:31,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:55:31,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:55:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:55:31,509 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 14:55:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:31,726 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 14:55:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:55:31,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 14:55:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:31,727 INFO L225 Difference]: With dead ends: 61 [2020-08-21 14:55:31,727 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 14:55:31,728 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 [2020-08-21 14:55:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 14:55:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 14:55:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 14:55:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 14:55:31,739 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 14:55:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:31,740 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 14:55:31,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:55:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 14:55:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 14:55:31,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:31,741 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:31,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:55:31,743 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-21 14:55:31,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:31,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139208689] [2020-08-21 14:55:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:31,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 14:55:32,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139208689] [2020-08-21 14:55:32,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:32,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 14:55:32,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116359669] [2020-08-21 14:55:32,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 14:55:32,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 14:55:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:55:32,421 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 14:55:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:32,649 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 14:55:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:55:32,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 14:55:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:32,651 INFO L225 Difference]: With dead ends: 64 [2020-08-21 14:55:32,651 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 14:55:32,652 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 [2020-08-21 14:55:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 14:55:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 14:55:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 14:55:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 14:55:32,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 14:55:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:32,666 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 14:55:32,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 14:55:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 14:55:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 14:55:32,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:32,669 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:32,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:55:32,669 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-21 14:55:32,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:32,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247930] [2020-08-21 14:55:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 14:55:33,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247930] [2020-08-21 14:55:33,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:33,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:55:33,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65215136] [2020-08-21 14:55:33,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:55:33,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:55:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:55:33,393 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 14:55:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:33,628 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 14:55:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:55:33,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 14:55:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:33,630 INFO L225 Difference]: With dead ends: 67 [2020-08-21 14:55:33,630 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 14:55:33,633 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 [2020-08-21 14:55:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 14:55:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 14:55:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 14:55:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 14:55:33,639 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 14:55:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:33,640 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 14:55:33,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:55:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 14:55:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 14:55:33,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:33,645 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:33,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:55:33,646 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-21 14:55:33,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:33,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260171945] [2020-08-21 14:55:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:33,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 14:55:34,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260171945] [2020-08-21 14:55:34,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:34,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 14:55:34,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27222760] [2020-08-21 14:55:34,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 14:55:34,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:34,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 14:55:34,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:55:34,424 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 14:55:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:34,701 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 14:55:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:55:34,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 14:55:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:34,703 INFO L225 Difference]: With dead ends: 70 [2020-08-21 14:55:34,703 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 14:55:34,705 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 [2020-08-21 14:55:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 14:55:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 14:55:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 14:55:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 14:55:34,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 14:55:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:34,712 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 14:55:34,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 14:55:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 14:55:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 14:55:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:34,716 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:34,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:55:34,716 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-21 14:55:34,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:34,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901795272] [2020-08-21 14:55:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:34,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 14:55:35,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901795272] [2020-08-21 14:55:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:35,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:55:35,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832116747] [2020-08-21 14:55:35,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:55:35,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:55:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:55:35,527 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 14:55:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:35,796 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 14:55:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:55:35,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 14:55:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:35,800 INFO L225 Difference]: With dead ends: 73 [2020-08-21 14:55:35,800 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 14:55:35,801 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 [2020-08-21 14:55:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 14:55:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 14:55:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 14:55:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 14:55:35,809 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 14:55:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:35,810 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 14:55:35,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:55:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 14:55:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 14:55:35,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:35,813 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:35,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:55:35,813 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-21 14:55:35,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:35,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411908071] [2020-08-21 14:55:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 14:55:36,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411908071] [2020-08-21 14:55:36,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:36,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 14:55:36,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814378791] [2020-08-21 14:55:36,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 14:55:36,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:36,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 14:55:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:55:36,714 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 14:55:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:37,083 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 14:55:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 14:55:37,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 14:55:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:37,084 INFO L225 Difference]: With dead ends: 76 [2020-08-21 14:55:37,084 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 14:55:37,085 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 [2020-08-21 14:55:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 14:55:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 14:55:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 14:55:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 14:55:37,095 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 14:55:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:37,095 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 14:55:37,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 14:55:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 14:55:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 14:55:37,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:37,098 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:37,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:55:37,099 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-21 14:55:37,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:37,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997339883] [2020-08-21 14:55:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 14:55:37,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997339883] [2020-08-21 14:55:37,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:37,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:55:37,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043161950] [2020-08-21 14:55:37,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:55:37,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:55:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:55:37,959 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 14:55:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:38,267 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 14:55:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:55:38,268 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 14:55:38,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:38,269 INFO L225 Difference]: With dead ends: 79 [2020-08-21 14:55:38,269 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 14:55:38,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 14:55:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 14:55:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 14:55:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 14:55:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 14:55:38,279 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 14:55:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:38,280 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 14:55:38,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:55:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 14:55:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 14:55:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:38,282 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:38,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:55:38,282 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-21 14:55:38,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:38,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478326238] [2020-08-21 14:55:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2020-08-21 14:55:39,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478326238] [2020-08-21 14:55:39,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:39,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:55:39,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133776387] [2020-08-21 14:55:39,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:55:39,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:55:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:55:39,684 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 8 states. [2020-08-21 14:55:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:39,778 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-08-21 14:55:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:55:39,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-08-21 14:55:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:39,779 INFO L225 Difference]: With dead ends: 75 [2020-08-21 14:55:39,779 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:55:39,780 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 [2020-08-21 14:55:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:55:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:55:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:55:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:55:39,781 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-08-21 14:55:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:39,781 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:55:39,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:55:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:55:39,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:55:39,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:55:39,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:55:39,816 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:55:39,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:55:39,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:55:39,817 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:55:39,817 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:55:39,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:55:39,817 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-21 14:55:39,817 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-21 14:55:39,818 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-21 14:55:39,818 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-21 14:55:39,818 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-21 14:55:39,819 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-21 14:55:39,819 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2020-08-21 14:55:39,819 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 14:55:39,819 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-21 14:55:39,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:55:39 BoogieIcfgContainer [2020-08-21 14:55:39,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:55:39,840 INFO L168 Benchmark]: Toolchain (without parser) took 15558.63 ms. Allocated memory was 138.9 MB in the beginning and 526.4 MB in the end (delta: 387.4 MB). Free memory was 102.3 MB in the beginning and 441.6 MB in the end (delta: -339.3 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,844 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.43 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,845 INFO L168 Benchmark]: Boogie Preprocessor took 107.63 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,846 INFO L168 Benchmark]: RCFGBuilder took 256.19 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 168.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,847 INFO L168 Benchmark]: TraceAbstraction took 14925.26 ms. Allocated memory was 201.9 MB in the beginning and 526.4 MB in the end (delta: 324.5 MB). Free memory was 168.5 MB in the beginning and 441.6 MB in the end (delta: -273.2 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:39,850 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.43 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.63 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.19 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 168.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14925.26 ms. Allocated memory was 201.9 MB in the beginning and 526.4 MB in the end (delta: 324.5 MB). Free memory was 168.5 MB in the beginning and 441.6 MB in the end (delta: -273.2 MB). Peak memory consumption was 51.4 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: 14.8s, 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, 5.2s 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, 9.9s 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...