/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:56:43,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:56:43,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:56:43,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:56:43,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:56:43,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:56:43,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:56:43,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:56:43,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:56:43,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:56:43,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:56:43,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:56:43,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:56:43,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:56:43,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:56:43,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:56:43,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:56:43,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:56:43,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:56:43,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:56:43,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:56:43,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:56:43,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:56:43,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:56:43,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:56:43,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:56:43,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:56:43,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:56:43,422 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 [2020-08-19 06:56:43,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:56:43,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:56:43,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:56:43,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:56:43,451 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:56:43,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:56:43,451 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:56:43,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:56:43,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:56:43,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:56:43,453 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:56:43,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:56:43,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:56:43,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:56:43,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:56:43,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:56:43,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:43,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:56:43,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:56:43,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:56:43,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:56:43,765 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:56:43,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:56:43,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:56:43,771 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:56:43,772 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-19 06:56:43,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1d736184/0841f8edcd3444e98bc7f5cd20f137b2/FLAG83b8c599d [2020-08-19 06:56:44,285 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:56:44,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-19 06:56:44,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1d736184/0841f8edcd3444e98bc7f5cd20f137b2/FLAG83b8c599d [2020-08-19 06:56:44,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1d736184/0841f8edcd3444e98bc7f5cd20f137b2 [2020-08-19 06:56:44,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:56:44,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:56:44,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:44,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:56:44,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:56:44,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44, skipping insertion in model container [2020-08-19 06:56:44,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:56:44,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:56:44,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:44,860 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:56:44,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:44,894 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:56:44,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44 WrapperNode [2020-08-19 06:56:44,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:44,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:56:44,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:56:44,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:56:44,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:44,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (1/1) ... [2020-08-19 06:56:45,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:56:45,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:56:45,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:56:45,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:56:45,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (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 [2020-08-19 06:56:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:56:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:56:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 06:56:45,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:56:45,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:56:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:56:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 06:56:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 06:56:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:56:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:56:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:56:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:56:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:56:45,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:56:45,313 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:56:45,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:45 BoogieIcfgContainer [2020-08-19 06:56:45,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:56:45,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:56:45,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:56:45,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:56:45,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:56:44" (1/3) ... [2020-08-19 06:56:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb73d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:45, skipping insertion in model container [2020-08-19 06:56:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:44" (2/3) ... [2020-08-19 06:56:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb73d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:45, skipping insertion in model container [2020-08-19 06:56:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:45" (3/3) ... [2020-08-19 06:56:45,329 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-19 06:56:45,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:56:45,373 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:56:45,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:56:45,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:56:45,437 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:56:45,437 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:56:45,437 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:56:45,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:56:45,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:56:45,438 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:56:45,438 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:56:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 06:56:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:56:45,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:45,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:45,466 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-19 06:56:45,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:45,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873384280] [2020-08-19 06:56:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:45,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873384280] [2020-08-19 06:56:45,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:45,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 06:56:45,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593660989] [2020-08-19 06:56:45,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 06:56:45,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 06:56:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 06:56:45,630 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-19 06:56:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:45,675 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-19 06:56:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 06:56:45,678 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-19 06:56:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:45,687 INFO L225 Difference]: With dead ends: 61 [2020-08-19 06:56:45,688 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 06:56:45,692 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 [2020-08-19 06:56:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 06:56:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-19 06:56:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 06:56:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-19 06:56:45,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-19 06:56:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:45,732 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-19 06:56:45,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 06:56:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-19 06:56:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 06:56:45,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:45,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:45,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:56:45,735 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-19 06:56:45,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:45,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802276288] [2020-08-19 06:56:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:45,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802276288] [2020-08-19 06:56:45,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:45,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:56:45,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118705814] [2020-08-19 06:56:45,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:45,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:45,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:45,858 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-19 06:56:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:45,965 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-19 06:56:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:45,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-19 06:56:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:45,967 INFO L225 Difference]: With dead ends: 35 [2020-08-19 06:56:45,967 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 06:56:45,969 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 [2020-08-19 06:56:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 06:56:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 06:56:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 06:56:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-19 06:56:45,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-19 06:56:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:45,983 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-19 06:56:45,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-19 06:56:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:56:45,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:45,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:45,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:56:45,986 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-19 06:56:45,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:45,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223346135] [2020-08-19 06:56:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 06:56:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:46,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223346135] [2020-08-19 06:56:46,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:46,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:46,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412709182] [2020-08-19 06:56:46,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:46,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:46,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:46,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:46,110 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-19 06:56:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:46,243 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-19 06:56:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:46,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-19 06:56:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:46,245 INFO L225 Difference]: With dead ends: 48 [2020-08-19 06:56:46,246 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 06:56:46,247 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 [2020-08-19 06:56:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 06:56:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-19 06:56:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 06:56:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-19 06:56:46,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-19 06:56:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-19 06:56:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-19 06:56:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:56:46,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:46,264 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] [2020-08-19 06:56:46,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:56:46,265 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-19 06:56:46,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:46,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498379685] [2020-08-19 06:56:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 06:56:46,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498379685] [2020-08-19 06:56:46,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:46,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:46,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203399714] [2020-08-19 06:56:46,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:46,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:46,357 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-19 06:56:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:46,458 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-19 06:56:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:46,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-19 06:56:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:46,461 INFO L225 Difference]: With dead ends: 55 [2020-08-19 06:56:46,461 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 06:56:46,462 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 [2020-08-19 06:56:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 06:56:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-19 06:56:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:56:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-19 06:56:46,476 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-19 06:56:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:46,481 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-19 06:56:46,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-19 06:56:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:56:46,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:46,483 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] [2020-08-19 06:56:46,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:56:46,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-19 06:56:46,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:46,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458883760] [2020-08-19 06:56:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 06:56:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 06:56:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:56:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 06:56:46,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458883760] [2020-08-19 06:56:46,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:46,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:56:46,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763631144] [2020-08-19 06:56:46,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:46,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:46,638 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-19 06:56:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:46,816 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-19 06:56:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:46,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-19 06:56:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:46,819 INFO L225 Difference]: With dead ends: 70 [2020-08-19 06:56:46,819 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 06:56:46,820 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 [2020-08-19 06:56:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 06:56:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 06:56:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 06:56:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-19 06:56:46,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-19 06:56:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:46,834 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-19 06:56:46,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-19 06:56:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:56:46,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:46,836 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] [2020-08-19 06:56:46,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:56:46,836 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-19 06:56:46,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:46,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526881779] [2020-08-19 06:56:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 06:56:46,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526881779] [2020-08-19 06:56:46,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:46,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:56:46,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935957203] [2020-08-19 06:56:46,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:56:46,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:56:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:46,932 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-19 06:56:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:47,101 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-19 06:56:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:47,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-19 06:56:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:47,103 INFO L225 Difference]: With dead ends: 72 [2020-08-19 06:56:47,103 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 06:56:47,104 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 [2020-08-19 06:56:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 06:56:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-19 06:56:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 06:56:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-19 06:56:47,117 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-19 06:56:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:47,118 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-19 06:56:47,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:56:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-19 06:56:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:56:47,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:47,120 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] [2020-08-19 06:56:47,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:56:47,121 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-19 06:56:47,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:47,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758899805] [2020-08-19 06:56:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:56:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:56:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 06:56:47,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758899805] [2020-08-19 06:56:47,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:47,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:47,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730031966] [2020-08-19 06:56:47,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:47,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:47,291 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-19 06:56:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:47,645 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-19 06:56:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:56:47,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-19 06:56:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:47,650 INFO L225 Difference]: With dead ends: 96 [2020-08-19 06:56:47,650 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 06:56:47,652 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 [2020-08-19 06:56:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 06:56:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-19 06:56:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 06:56:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-19 06:56:47,680 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-19 06:56:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:47,682 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-19 06:56:47,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-19 06:56:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 06:56:47,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:47,684 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] [2020-08-19 06:56:47,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:56:47,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-19 06:56:47,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:47,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713478389] [2020-08-19 06:56:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:56:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 06:56:47,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713478389] [2020-08-19 06:56:47,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:47,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:47,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727150353] [2020-08-19 06:56:47,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:47,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:47,850 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-19 06:56:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:48,063 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-19 06:56:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:48,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-19 06:56:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:48,065 INFO L225 Difference]: With dead ends: 89 [2020-08-19 06:56:48,066 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 06:56:48,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:56:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 06:56:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-19 06:56:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-19 06:56:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-19 06:56:48,079 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-19 06:56:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:48,079 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-19 06:56:48,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-19 06:56:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 06:56:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:48,081 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] [2020-08-19 06:56:48,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:56:48,082 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-19 06:56:48,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:48,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355580895] [2020-08-19 06:56:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:56:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:56:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:56:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 06:56:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:56:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-19 06:56:48,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355580895] [2020-08-19 06:56:48,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:48,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:56:48,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017179969] [2020-08-19 06:56:48,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:56:48,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:56:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:48,266 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-19 06:56:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:48,406 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-19 06:56:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:48,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-19 06:56:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:48,410 INFO L225 Difference]: With dead ends: 88 [2020-08-19 06:56:48,410 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 06:56:48,411 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 [2020-08-19 06:56:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 06:56:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-19 06:56:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 06:56:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-19 06:56:48,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-19 06:56:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:48,421 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-19 06:56:48,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:56:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-19 06:56:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 06:56:48,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:48,423 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] [2020-08-19 06:56:48,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:56:48,423 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:48,424 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-19 06:56:48,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:48,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-08-19 06:56:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:56:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:56:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 06:56:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 06:56:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-19 06:56:48,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509021953] [2020-08-19 06:56:48,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:48,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:56:48,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246411568] [2020-08-19 06:56:48,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:56:48,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:56:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:48,624 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-19 06:56:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:48,880 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-19 06:56:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:56:48,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-19 06:56:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:48,882 INFO L225 Difference]: With dead ends: 92 [2020-08-19 06:56:48,882 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 06:56:48,883 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 [2020-08-19 06:56:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 06:56:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-19 06:56:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:56:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-19 06:56:48,893 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-19 06:56:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:48,894 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-19 06:56:48,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:56:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-19 06:56:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-19 06:56:48,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:48,896 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] [2020-08-19 06:56:48,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:56:48,897 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-19 06:56:48,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:48,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193411568] [2020-08-19 06:56:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:56:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 06:56:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:56:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:56:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:56:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 06:56:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:56:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 06:56:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:56:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:56:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:56:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:56:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-19 06:56:49,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193411568] [2020-08-19 06:56:49,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:49,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:56:49,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356632598] [2020-08-19 06:56:49,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:56:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:56:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:56:49,189 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-19 06:56:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:49,393 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-19 06:56:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:49,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-19 06:56:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:49,395 INFO L225 Difference]: With dead ends: 83 [2020-08-19 06:56:49,395 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:56:49,396 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 [2020-08-19 06:56:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:56:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:56:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:56:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:56:49,398 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-19 06:56:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:49,398 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:56:49,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:56:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:56:49,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:56:49,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:56:49,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:56:49,803 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:56:49,803 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:56:49,803 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:56:49,803 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:56:49,804 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:56:49,804 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:56:49,804 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 06:56:49,804 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 06:56:49,804 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 06:56:49,804 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 06:56:49,805 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-19 06:56:49,805 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-19 06:56:49,805 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-19 06:56:49,805 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)) [2020-08-19 06:56:49,806 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-19 06:56:49,806 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-19 06:56:49,806 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-19 06:56:49,806 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)) [2020-08-19 06:56:49,806 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)) [2020-08-19 06:56:49,807 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-19 06:56:49,807 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-19 06:56:49,807 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-19 06:56:49,807 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-19 06:56:49,807 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)) [2020-08-19 06:56:49,807 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)) [2020-08-19 06:56:49,808 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-19 06:56:49,808 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)) [2020-08-19 06:56:49,808 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-19 06:56:49,808 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)) [2020-08-19 06:56:49,808 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-19 06:56:49,809 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-19 06:56:49,809 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)) [2020-08-19 06:56:49,809 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)) [2020-08-19 06:56:49,809 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 06:56:49,809 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 06:56:49,810 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 06:56:49,810 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 06:56:49,810 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 06:56:49,810 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 06:56:49,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:56:49 BoogieIcfgContainer [2020-08-19 06:56:49,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:56:49,834 INFO L168 Benchmark]: Toolchain (without parser) took 5181.92 ms. Allocated memory was 136.8 MB in the beginning and 302.5 MB in the end (delta: 165.7 MB). Free memory was 99.8 MB in the beginning and 196.9 MB in the end (delta: -97.2 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:49,835 INFO L168 Benchmark]: CDTParser took 0.30 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:56:49,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.11 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 89.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:49,837 INFO L168 Benchmark]: Boogie Preprocessor took 104.98 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 178.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:49,838 INFO L168 Benchmark]: RCFGBuilder took 315.00 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 162.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:49,839 INFO L168 Benchmark]: TraceAbstraction took 4511.85 ms. Allocated memory was 199.8 MB in the beginning and 302.5 MB in the end (delta: 102.8 MB). Free memory was 162.0 MB in the beginning and 196.9 MB in the end (delta: -34.9 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:49,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.11 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 89.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.98 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 178.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.00 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 162.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4511.85 ms. Allocated memory was 199.8 MB in the beginning and 302.5 MB in the end (delta: 102.8 MB). Free memory was 162.0 MB in the beginning and 196.9 MB in the end (delta: -34.9 MB). Peak memory consumption was 67.8 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: 3.9s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 1.9s, 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, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s 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...