/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 19:04:58,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:04:58,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:04:58,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:04:58,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:04:58,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:04:58,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:04:58,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:04:58,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:04:58,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:04:58,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:04:58,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:04:58,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:04:58,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:04:58,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:04:58,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:04:58,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:04:58,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:04:58,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:04:58,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:04:58,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:04:58,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:04:58,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:04:58,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:04:58,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 19:04:58,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:04:58,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:04:58,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:04:58,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 19:04:58,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:04:58,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:04:58,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:04:58,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:04:58,488 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:04:58,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:04:58,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:04:58,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:04:58,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:04:58,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:04:58,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:04:58,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:04:58,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:04:58,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:04:58,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:04:58,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:04:58,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:04:58,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:04:58,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:04:58,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:04:58,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:04:58,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:04:58,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:04:58,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:04:58,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:04:58,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:04:58,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:04:58,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:04:58,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:04:58,493 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=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 19:04:58,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:04:58,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:04:58,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:04:58,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:04:58,812 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:04:58,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-21 19:04:58,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/680ceb0cd/6c5457d661794f9ba8fa3457575a5ee1/FLAGed60f6c2d [2020-08-21 19:04:59,281 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:04:59,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-21 19:04:59,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/680ceb0cd/6c5457d661794f9ba8fa3457575a5ee1/FLAGed60f6c2d [2020-08-21 19:04:59,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/680ceb0cd/6c5457d661794f9ba8fa3457575a5ee1 [2020-08-21 19:04:59,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:04:59,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:04:59,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:04:59,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:04:59,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:04:59,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c23f4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59, skipping insertion in model container [2020-08-21 19:04:59,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:04:59,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:04:59,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:04:59,878 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:04:59,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:04:59,912 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:04:59,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59 WrapperNode [2020-08-21 19:04:59,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:04:59,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:04:59,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:04:59,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:04:59,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:04:59,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... [2020-08-21 19:05:00,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:05:00,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:05:00,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:05:00,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:05:00,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:05:00,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:05:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:05:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:05:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:05:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:05:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:05:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:05:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:05:00,319 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:05:00,320 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:05:00,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:05:00 BoogieIcfgContainer [2020-08-21 19:05:00,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:05:00,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:05:00,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:05:00,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:05:00,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:04:59" (1/3) ... [2020-08-21 19:05:00,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fca859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:05:00, skipping insertion in model container [2020-08-21 19:05:00,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:04:59" (2/3) ... [2020-08-21 19:05:00,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fca859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:05:00, skipping insertion in model container [2020-08-21 19:05:00,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:05:00" (3/3) ... [2020-08-21 19:05:00,334 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-21 19:05:00,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:05:00,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:05:00,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:05:00,414 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:05:00,415 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:05:00,415 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:05:00,415 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:05:00,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:05:00,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:05:00,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:05:00,416 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:05:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 19:05:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 19:05:00,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:00,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:05:00,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-21 19:05:00,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:00,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91445590] [2020-08-21 19:05:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:00,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:05:00,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91445590] [2020-08-21 19:05:00,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:00,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 19:05:00,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926066909] [2020-08-21 19:05:00,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 19:05:00,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 19:05:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 19:05:00,625 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-21 19:05:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:00,650 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-21 19:05:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 19:05:00,652 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 19:05:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:00,662 INFO L225 Difference]: With dead ends: 61 [2020-08-21 19:05:00,662 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 19:05:00,666 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 [2020-08-21 19:05:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 19:05:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-21 19:05:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 19:05:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-21 19:05:00,711 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-21 19:05:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:00,712 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-21 19:05:00,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 19:05:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-21 19:05:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 19:05:00,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:00,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:05:00,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:05:00,714 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:00,714 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-21 19:05:00,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:00,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158473325] [2020-08-21 19:05:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:00,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:05:00,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158473325] [2020-08-21 19:05:00,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:00,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:05:00,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650555884] [2020-08-21 19:05:00,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:05:00,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:05:00,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:05:00,824 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-21 19:05:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:00,916 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-21 19:05:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:05:00,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 19:05:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:00,919 INFO L225 Difference]: With dead ends: 35 [2020-08-21 19:05:00,919 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 19:05:00,920 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 [2020-08-21 19:05:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 19:05:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 19:05:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 19:05:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-21 19:05:00,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-21 19:05:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:00,934 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-21 19:05:00,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:05:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-21 19:05:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:05:00,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:00,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:05:00,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:05:00,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:00,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-21 19:05:00,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:00,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994109843] [2020-08-21 19:05:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 19:05:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:05:01,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994109843] [2020-08-21 19:05:01,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:01,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:05:01,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772193575] [2020-08-21 19:05:01,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:05:01,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:05:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:05:01,075 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-21 19:05:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:01,209 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-21 19:05:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:05:01,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 19:05:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:01,211 INFO L225 Difference]: With dead ends: 48 [2020-08-21 19:05:01,211 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 19:05:01,212 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 [2020-08-21 19:05:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 19:05:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 19:05:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 19:05:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 19:05:01,228 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-21 19:05:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:01,228 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 19:05:01,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:05:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 19:05:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 19:05:01,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:01,230 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] [2020-08-21 19:05:01,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:05:01,231 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-21 19:05:01,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:01,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505114991] [2020-08-21 19:05:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 19:05:01,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505114991] [2020-08-21 19:05:01,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:01,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:05:01,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582770227] [2020-08-21 19:05:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:05:01,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:05:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:05:01,314 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-21 19:05:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:01,409 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-21 19:05:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:05:01,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 19:05:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:01,412 INFO L225 Difference]: With dead ends: 55 [2020-08-21 19:05:01,412 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 19:05:01,413 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 [2020-08-21 19:05:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 19:05:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-21 19:05:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 19:05:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-21 19:05:01,427 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-21 19:05:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:01,427 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-21 19:05:01,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:05:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-21 19:05:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 19:05:01,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:01,429 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] [2020-08-21 19:05:01,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:05:01,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-21 19:05:01,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:01,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896069834] [2020-08-21 19:05:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 19:05:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 19:05:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:05:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 19:05:01,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896069834] [2020-08-21 19:05:01,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:01,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:05:01,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148591110] [2020-08-21 19:05:01,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:05:01,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:01,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:05:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:05:01,546 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-21 19:05:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:01,710 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-21 19:05:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:05:01,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-21 19:05:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:01,712 INFO L225 Difference]: With dead ends: 70 [2020-08-21 19:05:01,712 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 19:05:01,713 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 [2020-08-21 19:05:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 19:05:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 19:05:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 19:05:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-21 19:05:01,730 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-21 19:05:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:01,730 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-21 19:05:01,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:05:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-21 19:05:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 19:05:01,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:01,732 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] [2020-08-21 19:05:01,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:05:01,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:01,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-21 19:05:01,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:01,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571501301] [2020-08-21 19:05:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-21 19:05:01,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571501301] [2020-08-21 19:05:01,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:05:01,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:05:01,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082653738] [2020-08-21 19:05:01,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:05:01,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:01,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:05:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:05:01,910 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-21 19:05:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:02,102 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-21 19:05:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:05:02,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-21 19:05:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:02,104 INFO L225 Difference]: With dead ends: 72 [2020-08-21 19:05:02,104 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 19:05:02,105 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 [2020-08-21 19:05:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 19:05:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-21 19:05:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 19:05:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-21 19:05:02,129 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-21 19:05:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:02,130 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-21 19:05:02,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:05:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-21 19:05:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 19:05:02,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:02,135 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] [2020-08-21 19:05:02,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:05:02,135 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-21 19:05:02,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:02,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627925378] [2020-08-21 19:05:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:05:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 19:05:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 19:05:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:05:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-21 19:05:02,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627925378] [2020-08-21 19:05:02,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:05:02,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:05:02,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928656270] [2020-08-21 19:05:02,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:05:02,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:02,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:05:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:05:02,346 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-21 19:05:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:02,689 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-21 19:05:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:05:02,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-21 19:05:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:02,692 INFO L225 Difference]: With dead ends: 96 [2020-08-21 19:05:02,692 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 19:05:02,693 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 [2020-08-21 19:05:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 19:05:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-21 19:05:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 19:05:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-21 19:05:02,706 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-21 19:05:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:02,707 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-21 19:05:02,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:05:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-21 19:05:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 19:05:02,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:02,708 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] [2020-08-21 19:05:02,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:05:02,709 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-21 19:05:02,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:02,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022146682] [2020-08-21 19:05:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:05:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:05:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:05:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:05:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-21 19:05:02,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022146682] [2020-08-21 19:05:02,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:05:02,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:05:02,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667422211] [2020-08-21 19:05:02,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:05:02,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:05:02,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:05:02,814 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-21 19:05:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:03,001 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-21 19:05:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:05:03,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-21 19:05:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:03,004 INFO L225 Difference]: With dead ends: 89 [2020-08-21 19:05:03,004 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 19:05:03,005 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 [2020-08-21 19:05:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 19:05:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-21 19:05:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 19:05:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-21 19:05:03,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-21 19:05:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:03,016 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-21 19:05:03,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:05:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-21 19:05:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 19:05:03,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:03,018 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] [2020-08-21 19:05:03,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:05:03,019 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-21 19:05:03,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:03,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707149945] [2020-08-21 19:05:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:05:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:05:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:05:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:05:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 19:05:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 19:05:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 19:05:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 19:05:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-21 19:05:03,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707149945] [2020-08-21 19:05:03,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:05:03,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:05:03,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406706080] [2020-08-21 19:05:03,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:05:03,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:03,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:05:03,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:05:03,210 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-21 19:05:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:03,344 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 19:05:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:05:03,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-21 19:05:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:03,347 INFO L225 Difference]: With dead ends: 88 [2020-08-21 19:05:03,348 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 19:05:03,349 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 [2020-08-21 19:05:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 19:05:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-21 19:05:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 19:05:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-21 19:05:03,357 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-21 19:05:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:03,358 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-21 19:05:03,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:05:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-21 19:05:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 19:05:03,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:03,360 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] [2020-08-21 19:05:03,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:05:03,360 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-21 19:05:03,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:03,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684684635] [2020-08-21 19:05:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:05:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:05:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:05:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:05:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 19:05:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 19:05:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 19:05:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 19:05:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-21 19:05:03,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684684635] [2020-08-21 19:05:03,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:05:03,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:05:03,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882652963] [2020-08-21 19:05:03,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:05:03,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:05:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:05:03,539 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-21 19:05:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:03,819 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-21 19:05:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 19:05:03,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-21 19:05:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:03,822 INFO L225 Difference]: With dead ends: 92 [2020-08-21 19:05:03,822 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 19:05:03,823 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 [2020-08-21 19:05:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 19:05:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-21 19:05:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 19:05:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-21 19:05:03,833 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-21 19:05:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:03,834 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-21 19:05:03,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:05:03,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-21 19:05:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 19:05:03,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:05:03,836 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] [2020-08-21 19:05:03,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:05:03,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:05:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:05:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-21 19:05:03,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:05:03,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612279769] [2020-08-21 19:05:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:05:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:05:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:05:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 19:05:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 19:05:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:05:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:05:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:05:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:05:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 19:05:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 19:05:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 19:05:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 19:05:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 19:05:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 19:05:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 19:05:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 19:05:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:05:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-21 19:05:04,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612279769] [2020-08-21 19:05:04,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:05:04,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 19:05:04,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343282170] [2020-08-21 19:05:04,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:05:04,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:05:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:05:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:05:04,116 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-21 19:05:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:05:04,283 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-21 19:05:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:05:04,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-21 19:05:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:05:04,287 INFO L225 Difference]: With dead ends: 83 [2020-08-21 19:05:04,287 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:05:04,288 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 [2020-08-21 19:05:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:05:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:05:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:05:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:05:04,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-21 19:05:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:05:04,290 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:05:04,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:05:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:05:04,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:05:04,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:05:04,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:05:04,788 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:05:04,788 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:05:04,788 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:05:04,788 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:05:04,789 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-21 19:05:04,789 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-21 19:05:04,790 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-21 19:05:04,790 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)) [2020-08-21 19:05:04,790 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-21 19:05:04,790 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-21 19:05:04,790 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-21 19:05:04,791 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)) [2020-08-21 19:05:04,791 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)) [2020-08-21 19:05:04,791 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-21 19:05:04,791 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-21 19:05:04,791 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-21 19:05:04,791 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-21 19:05:04,791 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)) [2020-08-21 19:05:04,792 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)) [2020-08-21 19:05:04,792 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-21 19:05:04,792 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)) [2020-08-21 19:05:04,792 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-21 19:05:04,793 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)) [2020-08-21 19:05:04,793 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 19:05:04,793 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 19:05:04,793 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)) [2020-08-21 19:05:04,793 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)) [2020-08-21 19:05:04,794 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 19:05:04,794 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 19:05:04,794 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 19:05:04,794 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 19:05:04,794 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 19:05:04,795 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 19:05:04,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:05:04 BoogieIcfgContainer [2020-08-21 19:05:04,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:05:04,818 INFO L168 Benchmark]: Toolchain (without parser) took 5169.91 ms. Allocated memory was 136.8 MB in the beginning and 294.6 MB in the end (delta: 157.8 MB). Free memory was 99.8 MB in the beginning and 188.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 69.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,819 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.19 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 89.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,821 INFO L168 Benchmark]: Boogie Preprocessor took 108.26 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.8 MB in the beginning and 179.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,822 INFO L168 Benchmark]: RCFGBuilder took 302.39 ms. Allocated memory is still 199.8 MB. Free memory was 179.6 MB in the beginning and 163.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,822 INFO L168 Benchmark]: TraceAbstraction took 4490.18 ms. Allocated memory was 199.8 MB in the beginning and 294.6 MB in the end (delta: 94.9 MB). Free memory was 162.5 MB in the beginning and 191.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 66.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:05:04,826 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.19 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 89.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.26 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.8 MB in the beginning and 179.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.39 ms. Allocated memory is still 199.8 MB. Free memory was 179.6 MB in the beginning and 163.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4490.18 ms. Allocated memory was 199.8 MB in the beginning and 294.6 MB in the end (delta: 94.9 MB). Free memory was 162.5 MB in the beginning and 191.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 66.0 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: 3.8s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s 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, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s 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...