/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Addition01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:02,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:02,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:02,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:26:02,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:02,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:02,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:02,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:02,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:02,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:02,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:02,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:02,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:02,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:02,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:02,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:02,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:02,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:02,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:02,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:02,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:26:02,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:02,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:02,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:02,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:02,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:02,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:02,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:02,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:02,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:02,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:02,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:02,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:02,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:02,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:02,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:02,443 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:02,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:02,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:02,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:02,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:02,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:02,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:02,444 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:02,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:02,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:02,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:02,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:02,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:02,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition01-2.c [2020-10-23 20:26:02,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/716c9676e/aed22aef214c459cb7d4860c02a8389d/FLAGb4f8e496b [2020-10-23 20:26:03,646 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:03,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition01-2.c [2020-10-23 20:26:03,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/716c9676e/aed22aef214c459cb7d4860c02a8389d/FLAGb4f8e496b [2020-10-23 20:26:04,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/716c9676e/aed22aef214c459cb7d4860c02a8389d [2020-10-23 20:26:04,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:04,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:04,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:04,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:04,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:04,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4d5ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04, skipping insertion in model container [2020-10-23 20:26:04,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:04,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:04,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:04,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:04,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:04,300 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:04,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04 WrapperNode [2020-10-23 20:26:04,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:04,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:04,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:04,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:04,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:04,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:04,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:04,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:04,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 20:26:04,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:04,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:04,460 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:04,460 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-10-23 20:26:04,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-10-23 20:26:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:04,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:04,889 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:04,889 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:04 BoogieIcfgContainer [2020-10-23 20:26:04,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:04,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:04,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:04,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:04,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:04" (1/3) ... [2020-10-23 20:26:04,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d987b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:04, skipping insertion in model container [2020-10-23 20:26:04,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04" (2/3) ... [2020-10-23 20:26:04,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d987b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:04, skipping insertion in model container [2020-10-23 20:26:04,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:04" (3/3) ... [2020-10-23 20:26:04,901 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2020-10-23 20:26:04,914 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:04,922 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:04,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:04,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:04,985 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:04,985 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:04,985 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:04,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:04,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:04,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:04,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-23 20:26:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 20:26:05,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:05,029 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-23 20:26:05,030 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1587054050, now seen corresponding path program 1 times [2020-10-23 20:26:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886428613] [2020-10-23 20:26:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:05,151 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:05,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:05,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:05,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886428613] [2020-10-23 20:26:05,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:26:05,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977662063] [2020-10-23 20:26:05,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:26:05,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:26:05,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:05,706 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 9 states. [2020-10-23 20:26:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:06,671 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-23 20:26:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:26:06,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-23 20:26:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:06,685 INFO L225 Difference]: With dead ends: 69 [2020-10-23 20:26:06,686 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 20:26:06,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:26:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 20:26:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-23 20:26:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 20:26:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-23 20:26:06,752 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2020-10-23 20:26:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:06,753 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-23 20:26:06,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:26:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-23 20:26:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 20:26:06,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:06,757 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-23 20:26:06,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:06,757 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash 103475457, now seen corresponding path program 1 times [2020-10-23 20:26:06,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:06,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550560310] [2020-10-23 20:26:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:06,763 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550560310] [2020-10-23 20:26:06,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:06,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 20:26:06,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523419026] [2020-10-23 20:26:06,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 20:26:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 20:26:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:26:06,879 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 5 states. [2020-10-23 20:26:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:07,159 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-23 20:26:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 20:26:07,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-23 20:26:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:07,162 INFO L225 Difference]: With dead ends: 63 [2020-10-23 20:26:07,163 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 20:26:07,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 20:26:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-23 20:26:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 20:26:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-23 20:26:07,186 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-10-23 20:26:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:07,187 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-23 20:26:07,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 20:26:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-23 20:26:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:26:07,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:07,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2020-10-23 20:26:07,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:07,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1627984160, now seen corresponding path program 1 times [2020-10-23 20:26:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:07,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383581905] [2020-10-23 20:26:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:07,196 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:07,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-23 20:26:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 20:26:07,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383581905] [2020-10-23 20:26:07,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:07,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:26:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124723033] [2020-10-23 20:26:07,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:26:07,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:26:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:26:07,537 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 12 states. [2020-10-23 20:26:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:08,401 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-23 20:26:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 20:26:08,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-23 20:26:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:08,406 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:26:08,406 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:08,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-23 20:26:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-23 20:26:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:26:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-23 20:26:08,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 43 [2020-10-23 20:26:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:08,434 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-23 20:26:08,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:26:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-23 20:26:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 20:26:08,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:08,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:08,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:08,437 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -244455552, now seen corresponding path program 1 times [2020-10-23 20:26:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:08,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307252388] [2020-10-23 20:26:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:08,441 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 20:26:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:26:08,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307252388] [2020-10-23 20:26:08,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:08,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:08,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287068206] [2020-10-23 20:26:08,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:08,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:08,554 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2020-10-23 20:26:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:08,853 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-23 20:26:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:08,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-23 20:26:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:08,856 INFO L225 Difference]: With dead ends: 58 [2020-10-23 20:26:08,856 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:26:08,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:08,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:26:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:26:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-23 20:26:08,872 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 44 [2020-10-23 20:26:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:08,872 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-23 20:26:08,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-23 20:26:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 20:26:08,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:08,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:08,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:08,875 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1821070694, now seen corresponding path program 1 times [2020-10-23 20:26:08,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:08,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446910432] [2020-10-23 20:26:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:08,879 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:26:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-23 20:26:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:09,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-23 20:26:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:26:09,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446910432] [2020-10-23 20:26:09,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:09,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:09,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334379935] [2020-10-23 20:26:09,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:09,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:09,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:09,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:09,035 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 6 states. [2020-10-23 20:26:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:09,268 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-23 20:26:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:09,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-23 20:26:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:09,270 INFO L225 Difference]: With dead ends: 58 [2020-10-23 20:26:09,270 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 20:26:09,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 20:26:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 20:26:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 20:26:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 20:26:09,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2020-10-23 20:26:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:09,272 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 20:26:09,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 20:26:09,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 20:26:09,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:26:09,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 20:26:09,966 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 17 [2020-10-23 20:26:10,098 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 17 [2020-10-23 20:26:10,597 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,598 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,598 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,598 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,598 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,598 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,599 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,599 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,599 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,599 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,599 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,600 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point L35-2(line 35) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 28 47) the Hoare annotation is: true [2020-10-23 20:26:10,601 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 28 47) the Hoare annotation is: true [2020-10-23 20:26:10,602 INFO L270 CegarLoopResult]: At program point L42(lines 42 46) the Hoare annotation is: (let ((.cse0 (+ main_~m~0 main_~n~0))) (and (<= .cse0 main_~result~0) (<= main_~result~0 .cse0))) [2020-10-23 20:26:10,602 INFO L277 CegarLoopResult]: At program point L36(lines 36 40) the Hoare annotation is: true [2020-10-23 20:26:10,602 INFO L277 CegarLoopResult]: At program point L30(lines 30 34) the Hoare annotation is: true [2020-10-23 20:26:10,602 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 28 47) the Hoare annotation is: true [2020-10-23 20:26:10,602 INFO L270 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: false [2020-10-23 20:26:10,602 INFO L270 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: false [2020-10-23 20:26:10,603 INFO L270 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 (+ main_~m~0 main_~n~0))) (and (<= .cse0 main_~result~0) (<= main_~result~0 .cse0))) [2020-10-23 20:26:10,603 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (<= 0 main_~n~0) [2020-10-23 20:26:10,603 INFO L270 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (+ main_~m~0 main_~n~0))) (and (<= |main_#t~ret11| .cse0) (<= .cse0 |main_#t~ret11|))) [2020-10-23 20:26:10,603 INFO L277 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-10-23 20:26:10,603 INFO L270 CegarLoopResult]: At program point L41-2(line 41) the Hoare annotation is: (let ((.cse0 (+ main_~m~0 main_~n~0))) (and (<= |main_#t~ret11| .cse0) (<= .cse0 |main_#t~ret11|))) [2020-10-23 20:26:10,603 INFO L270 CegarLoopResult]: At program point L41-3(line 41) the Hoare annotation is: (let ((.cse0 (+ main_~m~0 main_~n~0))) (and (<= .cse0 main_~result~0) (<= |main_#t~ret11| .cse0) (<= .cse0 |main_#t~ret11|) (<= main_~result~0 .cse0))) [2020-10-23 20:26:10,604 INFO L277 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: true [2020-10-23 20:26:10,604 INFO L277 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: true [2020-10-23 20:26:10,604 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= addition_~n 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,604 INFO L270 CegarLoopResult]: At program point L22(lines 22 24) the Hoare annotation is: (and (<= addition_~n 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,604 INFO L270 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= addition_~n 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,605 INFO L270 CegarLoopResult]: At program point additionFINAL(lines 15 25) the Hoare annotation is: (let ((.cse0 (= |addition_#in~m| addition_~m)) (.cse1 (= |addition_#in~n| addition_~n))) (or (let ((.cse2 (+ |addition_#in~n| |addition_#in~m|))) (and .cse0 .cse1 (<= .cse2 |addition_#res|) (<= |addition_#res| .cse2))) (and (<= (+ |addition_#in~n| 1) 0) .cse0 .cse1))) [2020-10-23 20:26:10,605 INFO L270 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= addition_~n 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,605 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (<= 1 addition_~n)) [2020-10-23 20:26:10,605 INFO L270 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (and (<= addition_~n 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,605 INFO L270 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (and (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (not (= addition_~n 0))) [2020-10-23 20:26:10,606 INFO L270 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse0 (+ |addition_#in~n| |addition_#in~m|))) (and (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (<= |addition_#t~ret7| .cse0) (<= .cse0 |addition_#t~ret7|) (<= 1 addition_~n))) [2020-10-23 20:26:10,606 INFO L270 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (+ |addition_#in~n| |addition_#in~m|))) (and (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (<= |addition_#t~ret7| .cse0) (<= .cse0 |addition_#t~ret7|) (<= 1 addition_~n))) [2020-10-23 20:26:10,606 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (= |addition_#in~n| 0) (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n)) [2020-10-23 20:26:10,606 INFO L270 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (+ |addition_#in~n| |addition_#in~m|))) (and (= |addition_#in~m| addition_~m) (= |addition_#in~n| addition_~n) (<= |addition_#t~ret7| .cse0) (<= .cse0 |addition_#res|) (<= .cse0 |addition_#t~ret7|) (<= 1 addition_~n) (<= |addition_#res| .cse0))) [2020-10-23 20:26:10,606 INFO L270 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m)) [2020-10-23 20:26:10,607 INFO L270 CegarLoopResult]: At program point L15(lines 15 25) the Hoare annotation is: (= |addition_#in~m| addition_~m) [2020-10-23 20:26:10,607 INFO L277 CegarLoopResult]: At program point additionENTRY(lines 15 25) the Hoare annotation is: true [2020-10-23 20:26:10,607 INFO L270 CegarLoopResult]: At program point additionEXIT(lines 15 25) the Hoare annotation is: (let ((.cse0 (= |addition_#in~m| addition_~m)) (.cse1 (= |addition_#in~n| addition_~n))) (or (let ((.cse2 (+ |addition_#in~n| |addition_#in~m|))) (and .cse0 .cse1 (<= .cse2 |addition_#res|) (<= |addition_#res| .cse2))) (and (<= (+ |addition_#in~n| 1) 0) .cse0 .cse1))) [2020-10-23 20:26:10,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:26:10 BoogieIcfgContainer [2020-10-23 20:26:10,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:26:10,630 INFO L168 Benchmark]: Toolchain (without parser) took 6614.24 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 128.3 MB in the beginning and 128.6 MB in the end (delta: -230.2 kB). Peak memory consumption was 102.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:10,631 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:10,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.62 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 118.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:10,632 INFO L168 Benchmark]: Boogie Preprocessor took 61.25 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:10,633 INFO L168 Benchmark]: RCFGBuilder took 525.72 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 134.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:10,635 INFO L168 Benchmark]: TraceAbstraction took 5734.15 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 133.8 MB in the beginning and 128.6 MB in the end (delta: 5.2 MB). Peak memory consumption was 107.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:10,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.62 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 118.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.25 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.72 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 134.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5734.15 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 133.8 MB in the beginning and 128.6 MB in the end (delta: 5.2 MB). Peak memory consumption was 107.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 28]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for addition Derived contract for procedure addition: (((\old(m) == m && \old(n) == n) && \old(n) + \old(m) <= \result) && \result <= \old(n) + \old(m)) || ((\old(n) + 1 <= 0 && \old(m) == m) && \old(n) == n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 198 SDtfs, 282 SDslu, 271 SDs, 0 SdLazy, 667 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 54 LocationsWithAnnotation, 102 PreInvPairs, 152 NumberOfFragments, 372 HoareAnnotationTreeSize, 102 FomulaSimplifications, 3944 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 54 FomulaSimplificationsInter, 1496 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...