/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:16:29,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:16:29,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:16:29,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:16:29,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:16:29,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:16:29,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:16:29,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:16:29,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:16:29,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:16:29,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:16:29,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:16:29,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:16:29,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:16:29,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:16:29,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:16:29,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:16:29,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:16:29,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:16:29,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:16:29,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:16:29,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:16:29,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:16:29,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:16:29,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:16:29,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:16:29,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:16:29,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:16:29,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:16:29,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:16:29,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:16:29,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:16:29,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:16:29,425 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:16:29,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:16:29,425 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:16:29,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:16:29,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:16:29,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:16:29,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:16:29,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:16:29,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:16:29,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:16:29,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:16:29,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:16:29,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:16:29,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:16:29,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:16:29,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:16:29,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:16:29,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:16:29,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:16:29,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:16:29,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:16:29,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:16:29,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:16:29,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:16:29,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:16:29,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:16:29,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:16:29,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:16:29,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:16:29,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:16:29,732 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:16:29,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-18 12:16:29,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4c398399/c2e4d54648f54fc8afecf0eea43b6de6/FLAG66c8463f9 [2020-08-18 12:16:30,256 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:16:30,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-18 12:16:30,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4c398399/c2e4d54648f54fc8afecf0eea43b6de6/FLAG66c8463f9 [2020-08-18 12:16:30,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4c398399/c2e4d54648f54fc8afecf0eea43b6de6 [2020-08-18 12:16:30,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:16:30,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:16:30,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:16:30,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:16:30,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:16:30,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:30,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d19aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30, skipping insertion in model container [2020-08-18 12:16:30,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:30,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:16:30,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:16:30,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:16:30,875 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:16:30,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:16:30,911 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:16:30,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30 WrapperNode [2020-08-18 12:16:30,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:16:30,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:16:30,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:16:30,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:16:30,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:30,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... [2020-08-18 12:16:31,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:16:31,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:16:31,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:16:31,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:16:31,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:16:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:16:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:16:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 12:16:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 12:16:31,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:16:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:16:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:16:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 12:16:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 12:16:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:16:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:16:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:16:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:16:31,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:16:31,335 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 12:16:31,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:16:31 BoogieIcfgContainer [2020-08-18 12:16:31,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:16:31,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:16:31,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:16:31,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:16:31,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:16:30" (1/3) ... [2020-08-18 12:16:31,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3f68f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:16:31, skipping insertion in model container [2020-08-18 12:16:31,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:16:30" (2/3) ... [2020-08-18 12:16:31,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3f68f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:16:31, skipping insertion in model container [2020-08-18 12:16:31,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:16:31" (3/3) ... [2020-08-18 12:16:31,348 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-18 12:16:31,360 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:16:31,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:16:31,382 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:16:31,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:16:31,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:16:31,408 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:16:31,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:16:31,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:16:31,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:16:31,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:16:31,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:16:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 12:16:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 12:16:31,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:31,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:31,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-18 12:16:31,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:31,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596519862] [2020-08-18 12:16:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:31,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596519862] [2020-08-18 12:16:31,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:31,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 12:16:31,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610766794] [2020-08-18 12:16:31,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 12:16:31,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 12:16:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 12:16:31,587 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-18 12:16:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:31,616 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-18 12:16:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 12:16:31,617 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-18 12:16:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:31,628 INFO L225 Difference]: With dead ends: 61 [2020-08-18 12:16:31,628 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 12:16:31,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 12:16:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 12:16:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-18 12:16:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 12:16:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-18 12:16:31,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-18 12:16:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:31,679 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-18 12:16:31,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 12:16:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-18 12:16:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 12:16:31,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:31,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:31,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:16:31,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-18 12:16:31,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:31,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851581436] [2020-08-18 12:16:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:31,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:31,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851581436] [2020-08-18 12:16:31,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:31,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:16:31,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274352943] [2020-08-18 12:16:31,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:16:31,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:16:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:16:31,794 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-18 12:16:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:31,908 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-18 12:16:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:16:31,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 12:16:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:31,910 INFO L225 Difference]: With dead ends: 35 [2020-08-18 12:16:31,911 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 12:16:31,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 12:16:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 12:16:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 12:16:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-18 12:16:31,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-18 12:16:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:31,925 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-18 12:16:31,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:16:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-18 12:16:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 12:16:31,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:31,927 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:31,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:16:31,928 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-18 12:16:31,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:31,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98400577] [2020-08-18 12:16:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:16:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:16:32,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98400577] [2020-08-18 12:16:32,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:32,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:16:32,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704268719] [2020-08-18 12:16:32,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:16:32,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:32,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:16:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:32,079 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-18 12:16:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:32,220 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-18 12:16:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:16:32,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 12:16:32,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:32,223 INFO L225 Difference]: With dead ends: 48 [2020-08-18 12:16:32,224 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:16:32,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:16:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:16:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-18 12:16:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 12:16:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-18 12:16:32,248 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-18 12:16:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:32,249 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-18 12:16:32,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:16:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-18 12:16:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 12:16:32,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:32,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:32,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:16:32,251 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-18 12:16:32,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:32,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506182850] [2020-08-18 12:16:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 12:16:32,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506182850] [2020-08-18 12:16:32,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:16:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909315533] [2020-08-18 12:16:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:16:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:16:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:16:32,388 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-18 12:16:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:32,502 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-18 12:16:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:16:32,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-18 12:16:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:32,504 INFO L225 Difference]: With dead ends: 55 [2020-08-18 12:16:32,504 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 12:16:32,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:16:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 12:16:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-18 12:16:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 12:16:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-18 12:16:32,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-18 12:16:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:32,518 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-18 12:16:32,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:16:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-18 12:16:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 12:16:32,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:32,520 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:32,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:16:32,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-18 12:16:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:32,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224388650] [2020-08-18 12:16:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 12:16:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 12:16:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 12:16:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 12:16:32,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224388650] [2020-08-18 12:16:32,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:32,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:16:32,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940079750] [2020-08-18 12:16:32,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:16:32,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:16:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:16:32,614 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-18 12:16:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:32,784 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-18 12:16:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:16:32,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-18 12:16:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:32,787 INFO L225 Difference]: With dead ends: 70 [2020-08-18 12:16:32,787 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 12:16:32,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:16:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 12:16:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-18 12:16:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 12:16:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-18 12:16:32,800 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-18 12:16:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:32,800 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-18 12:16:32,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:16:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-18 12:16:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 12:16:32,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:32,802 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:32,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:16:32,802 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-18 12:16:32,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:32,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645762600] [2020-08-18 12:16:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 12:16:32,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645762600] [2020-08-18 12:16:32,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:16:32,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 12:16:32,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862118061] [2020-08-18 12:16:32,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:16:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:16:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:16:32,927 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-18 12:16:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:33,092 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-18 12:16:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:16:33,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-18 12:16:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:33,094 INFO L225 Difference]: With dead ends: 72 [2020-08-18 12:16:33,094 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 12:16:33,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:16:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 12:16:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-18 12:16:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 12:16:33,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-18 12:16:33,109 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-18 12:16:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:33,110 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-18 12:16:33,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:16:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-18 12:16:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 12:16:33,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:33,112 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:33,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:16:33,113 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-18 12:16:33,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:33,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461858522] [2020-08-18 12:16:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:16:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 12:16:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:16:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:16:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 12:16:33,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461858522] [2020-08-18 12:16:33,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:16:33,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:16:33,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233384236] [2020-08-18 12:16:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:16:33,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:16:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:16:33,321 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-18 12:16:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:33,690 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-18 12:16:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:16:33,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-18 12:16:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:33,694 INFO L225 Difference]: With dead ends: 96 [2020-08-18 12:16:33,694 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 12:16:33,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:16:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 12:16:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-18 12:16:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 12:16:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-18 12:16:33,708 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-18 12:16:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:33,709 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-18 12:16:33,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:16:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-18 12:16:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 12:16:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:33,711 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:33,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:16:33,711 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-18 12:16:33,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:33,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162958414] [2020-08-18 12:16:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:16:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:16:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:16:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 12:16:33,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162958414] [2020-08-18 12:16:33,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:16:33,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:16:33,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480286836] [2020-08-18 12:16:33,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:16:33,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:16:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:16:33,861 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-18 12:16:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:34,068 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-18 12:16:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:16:34,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-18 12:16:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:34,074 INFO L225 Difference]: With dead ends: 89 [2020-08-18 12:16:34,074 INFO L226 Difference]: Without dead ends: 87 [2020-08-18 12:16:34,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:16:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-18 12:16:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-18 12:16:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-18 12:16:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-18 12:16:34,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-18 12:16:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:34,100 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-18 12:16:34,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:16:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-18 12:16:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 12:16:34,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:34,102 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:34,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:16:34,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-18 12:16:34,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:34,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503967010] [2020-08-18 12:16:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:16:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:16:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:16:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 12:16:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:16:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 12:16:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 12:16:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-18 12:16:34,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503967010] [2020-08-18 12:16:34,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:16:34,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:16:34,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244267456] [2020-08-18 12:16:34,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:16:34,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:16:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:16:34,338 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-18 12:16:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:34,483 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-18 12:16:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:16:34,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-18 12:16:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:34,487 INFO L225 Difference]: With dead ends: 88 [2020-08-18 12:16:34,487 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 12:16:34,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:16:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 12:16:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-18 12:16:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 12:16:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 12:16:34,497 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-18 12:16:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:34,497 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 12:16:34,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:16:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 12:16:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 12:16:34,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:34,499 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:34,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:16:34,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-18 12:16:34,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:34,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769556668] [2020-08-18 12:16:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:16:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:16:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:16:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 12:16:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 12:16:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 12:16:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 12:16:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 12:16:34,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769556668] [2020-08-18 12:16:34,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:16:34,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:16:34,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657368601] [2020-08-18 12:16:34,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:16:34,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:16:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:16:34,681 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-18 12:16:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:34,956 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-18 12:16:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 12:16:34,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 12:16:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:34,959 INFO L225 Difference]: With dead ends: 92 [2020-08-18 12:16:34,962 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 12:16:34,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:16:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 12:16:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-18 12:16:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 12:16:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-18 12:16:34,983 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-18 12:16:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:34,984 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-18 12:16:34,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:16:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-18 12:16:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-18 12:16:34,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:16:34,989 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:16:34,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:16:34,989 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:16:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:16:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-18 12:16:34,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:16:34,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731484137] [2020-08-18 12:16:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:16:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:16:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:16:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 12:16:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 12:16:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:16:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:16:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 12:16:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:16:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 12:16:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 12:16:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 12:16:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 12:16:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 12:16:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 12:16:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 12:16:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 12:16:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:16:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-18 12:16:35,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731484137] [2020-08-18 12:16:35,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:16:35,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:16:35,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229510362] [2020-08-18 12:16:35,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:16:35,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:16:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:16:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:16:35,268 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-18 12:16:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:16:35,421 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-18 12:16:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 12:16:35,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-18 12:16:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:16:35,425 INFO L225 Difference]: With dead ends: 83 [2020-08-18 12:16:35,425 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:16:35,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-08-18 12:16:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:16:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:16:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:16:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:16:35,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-18 12:16:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:16:35,428 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:16:35,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:16:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:16:35,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:16:35,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:16:35,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:16:35,827 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 12:16:35,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:16:35,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:16:35,827 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:16:35,827 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:16:35,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-18 12:16:35,828 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-18 12:16:35,829 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,829 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-18 12:16:35,829 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 12:16:35,829 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-18 12:16:35,829 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,829 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,829 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-18 12:16:35,830 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-18 12:16:35,830 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-18 12:16:35,830 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-18 12:16:35,830 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,830 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,830 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-18 12:16:35,831 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,831 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-18 12:16:35,831 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-18 12:16:35,831 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-18 12:16:35,831 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-18 12:16:35,831 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-18 12:16:35,832 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-18 12:16:35,832 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 12:16:35,832 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 12:16:35,832 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 12:16:35,832 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 12:16:35,832 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 12:16:35,832 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 12:16:35,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:16:35 BoogieIcfgContainer [2020-08-18 12:16:35,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:16:35,854 INFO L168 Benchmark]: Toolchain (without parser) took 5184.22 ms. Allocated memory was 141.0 MB in the beginning and 272.6 MB in the end (delta: 131.6 MB). Free memory was 103.1 MB in the beginning and 109.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 125.2 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:35,854 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:16:35,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.83 ms. Allocated memory is still 141.0 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:35,856 INFO L168 Benchmark]: Boogie Preprocessor took 112.34 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:35,857 INFO L168 Benchmark]: RCFGBuilder took 314.38 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 167.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:35,858 INFO L168 Benchmark]: TraceAbstraction took 4510.28 ms. Allocated memory was 203.9 MB in the beginning and 272.6 MB in the end (delta: 68.7 MB). Free memory was 166.5 MB in the beginning and 109.5 MB in the end (delta: 57.0 MB). Peak memory consumption was 125.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:16:35,862 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.83 ms. Allocated memory is still 141.0 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.34 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.38 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 167.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4510.28 ms. Allocated memory was 203.9 MB in the beginning and 272.6 MB in the end (delta: 68.7 MB). Free memory was 166.5 MB in the beginning and 109.5 MB in the end (delta: 57.0 MB). Peak memory consumption was 125.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= buf && buf < buflim + 1) && buflim + 2 <= bufferlen) && in + buflim + 3 <= buf + inlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, 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, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 111624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1182/1281 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...