/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/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:26:00,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:26:00,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:26:00,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:26:00,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:26:00,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:26:00,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:26:00,676 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 00:26:00,698 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:26:00,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:26:00,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:26:00,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:26:00,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:26:00,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:26:00,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:26:00,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:26:00,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:26:00,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:26:00,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:26:00,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:26:00,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:26:00,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:26:00,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:26:00,716 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:26:00,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:26:00,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:26:00,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:26:00,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:26:00,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:26:00,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:26:00,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:26:01,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:26:01,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:26:01,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:26:01,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:26:01,205 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:26:01,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-11-07 00:26:01,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fcac986/04aa8b8cbf8b4597a8eebb501a7ce723/FLAG73f1e40b9 [2020-11-07 00:26:01,892 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:26:01,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-11-07 00:26:01,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fcac986/04aa8b8cbf8b4597a8eebb501a7ce723/FLAG73f1e40b9 [2020-11-07 00:26:02,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fcac986/04aa8b8cbf8b4597a8eebb501a7ce723 [2020-11-07 00:26:02,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:26:02,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:26:02,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:02,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:26:02,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:26:02,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2576cc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02, skipping insertion in model container [2020-11-07 00:26:02,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:26:02,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:26:02,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:02,506 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:26:02,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:02,552 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:26:02,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02 WrapperNode [2020-11-07 00:26:02,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:02,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:26:02,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:26:02,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:26:02,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (1/1) ... [2020-11-07 00:26:02,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:26:02,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:26:02,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:26:02,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:26:02,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (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 00:26:02,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:26:02,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:26:02,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:26:02,680 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-11-07 00:26:02,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:26:02,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-11-07 00:26:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:26:02,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:26:02,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:26:02,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:26:02,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:26:02,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:26:02,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:26:03,034 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:26:03,038 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:26:03,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:03 BoogieIcfgContainer [2020-11-07 00:26:03,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:26:03,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:26:03,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:26:03,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:26:03,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:26:02" (1/3) ... [2020-11-07 00:26:03,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1584fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:03, skipping insertion in model container [2020-11-07 00:26:03,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:02" (2/3) ... [2020-11-07 00:26:03,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1584fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:03, skipping insertion in model container [2020-11-07 00:26:03,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:03" (3/3) ... [2020-11-07 00:26:03,054 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-11-07 00:26:03,073 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:26:03,076 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:26:03,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:26:03,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:26:03,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:26:03,131 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:26:03,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:26:03,131 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:26:03,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:26:03,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:26:03,132 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:26:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-07 00:26:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 00:26:03,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:03,160 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] [2020-11-07 00:26:03,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1590698952, now seen corresponding path program 1 times [2020-11-07 00:26:03,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:03,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115292769] [2020-11-07 00:26:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:03,268 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:26:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:03,915 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 00:26:03,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115292769] [2020-11-07 00:26:03,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:03,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:26:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718439420] [2020-11-07 00:26:03,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:26:03,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:03,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:26:03,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:26:03,952 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 8 states. [2020-11-07 00:26:04,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:04,641 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-11-07 00:26:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:26:04,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-07 00:26:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:04,653 INFO L225 Difference]: With dead ends: 59 [2020-11-07 00:26:04,653 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 00:26:04,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:26:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 00:26:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 00:26:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:26:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-11-07 00:26:04,711 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-11-07 00:26:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:04,712 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-11-07 00:26:04,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:26:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-11-07 00:26:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:26:04,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:04,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-11-07 00:26:04,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:26:04,716 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash 399377195, now seen corresponding path program 1 times [2020-11-07 00:26:04,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:04,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833080485] [2020-11-07 00:26:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:04,722 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:26:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:26:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-07 00:26:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-07 00:26:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833080485] [2020-11-07 00:26:05,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:05,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:26:05,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367416954] [2020-11-07 00:26:05,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:26:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:26:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:26:05,016 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 13 states. [2020-11-07 00:26:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:05,688 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-11-07 00:26:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:26:05,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-11-07 00:26:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:05,690 INFO L225 Difference]: With dead ends: 37 [2020-11-07 00:26:05,690 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:26:05,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:26:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:26:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:26:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:26:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:26:05,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-11-07 00:26:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:05,693 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:26:05,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:26:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:26:05,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:26:05,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:26:05,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:26:05,982 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-11-07 00:26:06,597 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-11-07 00:26:06,680 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,680 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,680 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,681 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,682 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 00:26:06,685 INFO L269 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,685 INFO L269 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-11-07 00:26:06,685 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,686 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,686 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,686 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,686 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 00:26:06,686 INFO L262 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: false [2020-11-07 00:26:06,686 INFO L262 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: false [2020-11-07 00:26:06,687 INFO L269 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-11-07 00:26:06,687 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 26 34) the Hoare annotation is: true [2020-11-07 00:26:06,688 INFO L262 CegarLoopResult]: At program point L29(lines 29 33) the Hoare annotation is: (let ((.cse0 (< 90 main_~result~0))) (or (and (<= main_~x~0 (+ main_~result~0 10)) (< (+ main_~result~0 9) main_~x~0) .cse0) (and (<= main_~result~0 91) .cse0))) [2020-11-07 00:26:06,688 INFO L269 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-11-07 00:26:06,689 INFO L269 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-11-07 00:26:06,689 INFO L262 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: (let ((.cse0 (<= 91 |main_#t~ret10|))) (or (and (<= |main_#t~ret10| 91) .cse0) (let ((.cse1 (+ |main_#t~ret10| 10))) (and .cse0 (<= .cse1 main_~x~0) (<= main_~x~0 .cse1))))) [2020-11-07 00:26:06,689 INFO L269 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-11-07 00:26:06,689 INFO L262 CegarLoopResult]: At program point L28-2(line 28) the Hoare annotation is: (let ((.cse0 (<= 91 |main_#t~ret10|))) (or (and (<= |main_#t~ret10| 91) .cse0) (let ((.cse1 (+ |main_#t~ret10| 10))) (and .cse0 (<= .cse1 main_~x~0) (<= main_~x~0 .cse1))))) [2020-11-07 00:26:06,689 INFO L262 CegarLoopResult]: At program point L28-3(line 28) the Hoare annotation is: (let ((.cse0 (< 90 main_~result~0))) (or (let ((.cse1 (+ |main_#t~ret10| 10))) (and (<= main_~x~0 (+ main_~result~0 10)) (< (+ main_~result~0 9) main_~x~0) .cse0 (<= .cse1 main_~x~0) (<= main_~x~0 .cse1))) (and (<= main_~result~0 91) (<= |main_#t~ret10| 91) .cse0 (<= 91 |main_#t~ret10|)))) [2020-11-07 00:26:06,690 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 26 34) the Hoare annotation is: true [2020-11-07 00:26:06,690 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 26 34) the Hoare annotation is: true [2020-11-07 00:26:06,692 INFO L262 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|)) [2020-11-07 00:26:06,692 INFO L262 CegarLoopResult]: At program point L21-1(line 21) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret7| 101)) [2020-11-07 00:26:06,693 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= 101 f91_~x)) [2020-11-07 00:26:06,693 INFO L262 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret7| 101)) [2020-11-07 00:26:06,693 INFO L262 CegarLoopResult]: At program point f91EXIT(lines 17 23) the Hoare annotation is: (let ((.cse0 (= f91_~x |f91_#in~x|))) (or (and (<= |f91_#res| 91) (<= f91_~x 100) (<= 91 |f91_#res|) .cse0) (let ((.cse1 (+ |f91_#res| 10))) (and (<= |f91_#in~x| .cse1) (<= .cse1 |f91_#in~x|) .cse0 (<= 101 f91_~x))))) [2020-11-07 00:26:06,693 INFO L262 CegarLoopResult]: At program point L18(lines 18 22) the Hoare annotation is: (= f91_~x |f91_#in~x|) [2020-11-07 00:26:06,694 INFO L262 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (and (<= f91_~x 100) (<= 91 |f91_#t~ret8|) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret8| 91) (<= |f91_#t~ret7| 101)) [2020-11-07 00:26:06,694 INFO L262 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= f91_~x 100) (<= 91 |f91_#t~ret8|) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret8| 91) (<= |f91_#t~ret7| 101)) [2020-11-07 00:26:06,694 INFO L262 CegarLoopResult]: At program point L21-5(line 21) the Hoare annotation is: (and (<= |f91_#res| 91) (<= f91_~x 100) (<= 91 |f91_#res|) (<= 91 |f91_#t~ret8|) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret8| 91) (<= |f91_#t~ret7| 101)) [2020-11-07 00:26:06,694 INFO L262 CegarLoopResult]: At program point L21-6(line 21) the Hoare annotation is: (and (<= |f91_#res| 91) (<= f91_~x 100) (<= 91 |f91_#res|) (<= 91 |f91_#t~ret8|) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret8| 91)) [2020-11-07 00:26:06,694 INFO L269 CegarLoopResult]: At program point f91ENTRY(lines 17 23) the Hoare annotation is: true [2020-11-07 00:26:06,695 INFO L262 CegarLoopResult]: At program point f91FINAL(lines 17 23) the Hoare annotation is: (let ((.cse0 (= f91_~x |f91_#in~x|))) (or (and (<= |f91_#res| 91) (<= f91_~x 100) (<= 91 |f91_#res|) .cse0) (let ((.cse1 (+ |f91_#res| 10))) (and (<= |f91_#in~x| .cse1) (<= .cse1 |f91_#in~x|) .cse0 (<= 101 f91_~x))))) [2020-11-07 00:26:06,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:26:06 BoogieIcfgContainer [2020-11-07 00:26:06,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:26:06,718 INFO L168 Benchmark]: Toolchain (without parser) took 4431.74 ms. Allocated memory was 125.8 MB in the beginning and 181.4 MB in the end (delta: 55.6 MB). Free memory was 102.3 MB in the beginning and 133.8 MB in the end (delta: -31.5 MB). Peak memory consumption was 99.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:06,719 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:26:06,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.81 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 92.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:06,721 INFO L168 Benchmark]: Boogie Preprocessor took 37.52 ms. Allocated memory is still 125.8 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:06,722 INFO L168 Benchmark]: RCFGBuilder took 442.07 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 77.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:06,723 INFO L168 Benchmark]: TraceAbstraction took 3670.32 ms. Allocated memory was 125.8 MB in the beginning and 181.4 MB in the end (delta: 55.6 MB). Free memory was 77.3 MB in the beginning and 133.8 MB in the end (delta: -56.5 MB). Peak memory consumption was 74.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:06,727 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 125.8 MB. Free memory is still 103.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.81 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 92.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.52 ms. Allocated memory is still 125.8 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 442.07 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 77.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3670.32 ms. Allocated memory was 125.8 MB in the beginning and 181.4 MB in the end (delta: 55.6 MB). Free memory was 77.3 MB in the beginning and 133.8 MB in the end (delta: -56.5 MB). Peak memory consumption was 74.0 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: 26]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for f91 Derived contract for procedure f91: (((\result <= 91 && x <= 100) && 91 <= \result) && x == \old(x)) || (((\old(x) <= \result + 10 && \result + 10 <= \old(x)) && x == \old(x)) && 101 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 83 SDslu, 171 SDs, 0 SdLazy, 297 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 43 LocationsWithAnnotation, 71 PreInvPairs, 90 NumberOfFragments, 334 HoareAnnotationTreeSize, 71 FomulaSimplifications, 235 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 43 FomulaSimplificationsInter, 1061 FormulaSimplificationTreeSizeReductionInter, 0.8s 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...