/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-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:41:37,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:41:37,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:41:37,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:41:37,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:41:37,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:41:37,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:41:37,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:41:37,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:41:37,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:41:37,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:41:37,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:41:37,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:41:37,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:41:37,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:41:37,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:41:37,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:41:37,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:41:37,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:41:37,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:41:37,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:41:37,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:41:37,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:41:37,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:41:37,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:41:37,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:41:37,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:41:37,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:41:37,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:41:37,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:41:37,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:41:37,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:41:37,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:41:37,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:41:37,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:41:37,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:41:37,657 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:41:37,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:41:37,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:41:37,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:41:37,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:41:37,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:41:37,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:41:37,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:41:38,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:41:38,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:41:38,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:41:38,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:41:38,115 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:41:38,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-11-07 00:41:38,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ffa3727/658b1a1c49b745c9a438bab06ce7de8a/FLAG815a19710 [2020-11-07 00:41:38,835 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:41:38,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-11-07 00:41:38,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ffa3727/658b1a1c49b745c9a438bab06ce7de8a/FLAG815a19710 [2020-11-07 00:41:39,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ffa3727/658b1a1c49b745c9a438bab06ce7de8a [2020-11-07 00:41:39,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:41:39,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:41:39,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:39,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:41:39,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:41:39,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6232dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39, skipping insertion in model container [2020-11-07 00:41:39,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:41:39,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:41:39,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:39,444 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:41:39,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:39,476 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:41:39,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39 WrapperNode [2020-11-07 00:41:39,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:39,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:41:39,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:41:39,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:41:39,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (1/1) ... [2020-11-07 00:41:39,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:41:39,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:41:39,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:41:39,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:41:39,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (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 [2020-11-07 00:41:39,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:41:39,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:41:39,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:41:39,618 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 00:41:39,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:41:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:41:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:41:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:41:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:41:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:41:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 00:41:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:41:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:41:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:41:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:41:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:41:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:41:39,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:41:40,112 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:41:40,114 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:41:40,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:40 BoogieIcfgContainer [2020-11-07 00:41:40,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:41:40,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:41:40,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:41:40,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:41:40,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:39" (1/3) ... [2020-11-07 00:41:40,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb41f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:40, skipping insertion in model container [2020-11-07 00:41:40,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:39" (2/3) ... [2020-11-07 00:41:40,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb41f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:40, skipping insertion in model container [2020-11-07 00:41:40,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:40" (3/3) ... [2020-11-07 00:41:40,133 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-11-07 00:41:40,168 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:41:40,173 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:41:40,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:41:40,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:41:40,233 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:41:40,233 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:41:40,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:41:40,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:41:40,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:41:40,233 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:41:40,234 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:41:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 00:41:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:41:40,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:40,275 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] [2020-11-07 00:41:40,276 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:40,288 INFO L82 PathProgramCache]: Analyzing trace with hash -891182369, now seen corresponding path program 1 times [2020-11-07 00:41:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:40,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093347207] [2020-11-07 00:41:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:40,391 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:40,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:40,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:41:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093347207] [2020-11-07 00:41:40,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:40,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297877094] [2020-11-07 00:41:40,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:40,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:40,847 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-11-07 00:41:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:41,322 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-07 00:41:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:41,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 00:41:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:41,335 INFO L225 Difference]: With dead ends: 53 [2020-11-07 00:41:41,336 INFO L226 Difference]: Without dead ends: 34 [2020-11-07 00:41:41,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-07 00:41:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-07 00:41:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 00:41:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 00:41:41,397 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-11-07 00:41:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:41,398 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 00:41:41,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 00:41:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:41:41,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:41,401 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 00:41:41,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:41:41,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1768365674, now seen corresponding path program 1 times [2020-11-07 00:41:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:41,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984732450] [2020-11-07 00:41:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:41,407 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:41,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:41,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984732450] [2020-11-07 00:41:41,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:41,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:41,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497896206] [2020-11-07 00:41:41,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:41,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:41,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:41,669 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-11-07 00:41:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:41,927 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-07 00:41:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:41,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-07 00:41:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:41,929 INFO L225 Difference]: With dead ends: 53 [2020-11-07 00:41:41,929 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 00:41:41,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 00:41:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-07 00:41:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:41:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 00:41:41,945 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-11-07 00:41:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:41,945 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 00:41:41,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 00:41:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:41:41,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:41,947 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 00:41:41,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:41:41,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1897653930, now seen corresponding path program 1 times [2020-11-07 00:41:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:41,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408376428] [2020-11-07 00:41:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:41,952 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:42,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408376428] [2020-11-07 00:41:42,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:42,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:42,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206955225] [2020-11-07 00:41:42,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:42,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:42,164 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-11-07 00:41:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:42,709 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-11-07 00:41:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:42,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-07 00:41:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:42,711 INFO L225 Difference]: With dead ends: 46 [2020-11-07 00:41:42,711 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 00:41:42,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 00:41:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-07 00:41:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-07 00:41:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-11-07 00:41:42,739 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2020-11-07 00:41:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:42,740 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-11-07 00:41:42,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-11-07 00:41:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:41:42,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:42,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:42,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:41:42,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -530753177, now seen corresponding path program 1 times [2020-11-07 00:41:42,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:42,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928014545] [2020-11-07 00:41:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:42,753 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:42,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:43,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928014545] [2020-11-07 00:41:43,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:43,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294399759] [2020-11-07 00:41:43,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:43,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:43,034 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-11-07 00:41:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:43,638 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-07 00:41:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:43,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-11-07 00:41:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:43,641 INFO L225 Difference]: With dead ends: 59 [2020-11-07 00:41:43,641 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 00:41:43,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 00:41:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-07 00:41:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 00:41:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-11-07 00:41:43,656 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 43 [2020-11-07 00:41:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:43,657 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-11-07 00:41:43,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-11-07 00:41:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:41:43,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:43,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2020-11-07 00:41:43,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:41:43,659 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -660041433, now seen corresponding path program 2 times [2020-11-07 00:41:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:43,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248482955] [2020-11-07 00:41:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:43,663 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:41:43,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248482955] [2020-11-07 00:41:43,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:43,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:41:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889789577] [2020-11-07 00:41:43,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:41:43,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:43,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:41:43,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:41:43,916 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 12 states. [2020-11-07 00:41:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:44,808 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-07 00:41:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:41:44,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-11-07 00:41:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:44,810 INFO L225 Difference]: With dead ends: 54 [2020-11-07 00:41:44,811 INFO L226 Difference]: Without dead ends: 48 [2020-11-07 00:41:44,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:41:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-07 00:41:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-11-07 00:41:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 00:41:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-11-07 00:41:44,841 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-11-07 00:41:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:44,842 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-11-07 00:41:44,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:41:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-11-07 00:41:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 00:41:44,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:44,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-11-07 00:41:44,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:41:44,844 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1818492638, now seen corresponding path program 3 times [2020-11-07 00:41:44,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:44,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723879449] [2020-11-07 00:41:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:44,852 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:44,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:44,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:45,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:45,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:45,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-07 00:41:45,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723879449] [2020-11-07 00:41:45,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:45,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:41:45,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426555356] [2020-11-07 00:41:45,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:41:45,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:41:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:41:45,155 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-11-07 00:41:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:46,002 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-07 00:41:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:41:46,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-11-07 00:41:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:46,006 INFO L225 Difference]: With dead ends: 54 [2020-11-07 00:41:46,006 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:41:46,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:41:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:41:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:41:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:41:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:41:46,011 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-07 00:41:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:46,013 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:41:46,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:41:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:41:46,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:41:46,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:41:46,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:41:46,738 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-11-07 00:41:46,931 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-11-07 00:41:47,384 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2020-11-07 00:41:47,390 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point L4-3(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point L4-4(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,391 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,392 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,392 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,392 INFO L262 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|)) [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point L4-2(line 4) the Hoare annotation is: true [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,393 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,394 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,394 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 00:41:47,394 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:47,394 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:47,394 INFO L262 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-11-07 00:41:47,394 INFO L262 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-11-07 00:41:47,395 INFO L262 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: false [2020-11-07 00:41:47,395 INFO L269 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-07 00:41:47,395 INFO L269 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-11-07 00:41:47,395 INFO L262 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 1 |main_#t~ret9|) (<= |main_#t~ret9| 1)) (and (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|)) (= |main_#t~ret9| 0)) [2020-11-07 00:41:47,395 INFO L269 CegarLoopResult]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2020-11-07 00:41:47,396 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= 1 |main_#t~ret9|) (<= main_~result~0 1) (<= |main_#t~ret9| 1) .cse0) (and (= main_~result~0 0) (= |main_#t~ret9| 0)) (and (<= main_~result~0 2) (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|) .cse0))) [2020-11-07 00:41:47,396 INFO L262 CegarLoopResult]: At program point idFINAL(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-11-07 00:41:47,396 INFO L262 CegarLoopResult]: At program point idEXIT(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2020-11-07 00:41:47,396 INFO L269 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-07 00:41:47,397 INFO L262 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-11-07 00:41:47,397 INFO L262 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-11-07 00:41:47,397 INFO L269 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-07 00:41:47,397 INFO L262 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) [2020-11-07 00:41:47,397 INFO L269 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-11-07 00:41:47,397 INFO L262 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: (or (and (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|)) (and (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= 0 |id_#t~ret7|) (<= |id_#t~ret7| 0))) [2020-11-07 00:41:47,398 INFO L269 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-11-07 00:41:47,398 INFO L262 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: (or (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= id_~ret~0 2) (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|) (<= 2 id_~ret~0)) (and (<= 0 |id_#t~ret7|) (<= id_~ret~0 1) (<= |id_#t~ret7| 0) (<= 1 id_~ret~0))) [2020-11-07 00:41:47,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:41:47 BoogieIcfgContainer [2020-11-07 00:41:47,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:41:47,419 INFO L168 Benchmark]: Toolchain (without parser) took 8189.45 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 129.3 MB in the beginning and 189.6 MB in the end (delta: -60.3 MB). Peak memory consumption was 124.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:47,421 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory was 128.9 MB in the beginning and 128.8 MB in the end (delta: 152.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:41:47,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.40 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 119.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:47,423 INFO L168 Benchmark]: Boogie Preprocessor took 35.42 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:47,424 INFO L168 Benchmark]: RCFGBuilder took 606.00 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 105.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:47,428 INFO L168 Benchmark]: TraceAbstraction took 7293.94 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 104.7 MB in the beginning and 189.6 MB in the end (delta: -84.9 MB). Peak memory consumption was 99.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:47,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory was 128.9 MB in the beginning and 128.8 MB in the end (delta: 152.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.40 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 119.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.42 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 606.00 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 105.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7293.94 ms. Allocated memory was 153.1 MB in the beginning and 222.3 MB in the end (delta: 69.2 MB). Free memory was 104.7 MB in the beginning and 189.6 MB in the end (delta: -84.9 MB). Peak memory consumption was 99.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 4]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: ((((ret <= 2 && 2 <= ret) || (3 <= ret && ret / 4294967296 <= 0)) || (((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret)) || (0 <= \result && \result <= 0)) && (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 189 SDslu, 556 SDs, 0 SdLazy, 887 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, 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, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 70 PreInvPairs, 130 NumberOfFragments, 374 HoareAnnotationTreeSize, 70 FomulaSimplifications, 6276 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 39 FomulaSimplificationsInter, 1398 FormulaSimplificationTreeSizeReductionInter, 1.0s 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...