/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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:26:09,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:26:09,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:26:09,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:26:09,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:26:09,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:26:09,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:26:09,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:26:09,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:26:09,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:26:09,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:26:09,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:26:09,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:26:09,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:26:09,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:26:09,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:26:09,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:26:09,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:26:09,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:26:09,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:26:09,640 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 00:26:09,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:26:09,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:26:09,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:26:09,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:26:09,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:26:09,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:26:09,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:26:09,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:26:09,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:26:09,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:26:09,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:26:09,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:26:09,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:26:09,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:26:09,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:26:09,677 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:26:09,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:26:09,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:26:09,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:26:09,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:26:09,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:26:09,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:26:09,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:26:10,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:26:10,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:26:10,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:26:10,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:26:10,151 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:26:10,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-11-07 00:26:10,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d5ce08d/25ff91eeaec749d0a1356133ee232631/FLAG6773067ff [2020-11-07 00:26:10,888 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:26:10,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-11-07 00:26:10,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d5ce08d/25ff91eeaec749d0a1356133ee232631/FLAG6773067ff [2020-11-07 00:26:11,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d5ce08d/25ff91eeaec749d0a1356133ee232631 [2020-11-07 00:26:11,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:26:11,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:26:11,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:11,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:26:11,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:26:11,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33af22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11, skipping insertion in model container [2020-11-07 00:26:11,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:26:11,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:26:11,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:11,524 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:26:11,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:26:11,558 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:26:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11 WrapperNode [2020-11-07 00:26:11,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:26:11,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:26:11,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:26:11,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:26:11,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (1/1) ... [2020-11-07 00:26:11,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:26:11,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:26:11,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:26:11,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:26:11,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (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 00:26:11,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:26:11,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:26:11,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:26:11,710 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-07 00:26:11,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:26:11,711 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:26:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:26:11,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:26:12,166 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:26:12,167 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:26:12,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:12 BoogieIcfgContainer [2020-11-07 00:26:12,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:26:12,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:26:12,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:26:12,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:26:12,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:26:11" (1/3) ... [2020-11-07 00:26:12,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5792b7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:12, skipping insertion in model container [2020-11-07 00:26:12,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:26:11" (2/3) ... [2020-11-07 00:26:12,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5792b7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:26:12, skipping insertion in model container [2020-11-07 00:26:12,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:26:12" (3/3) ... [2020-11-07 00:26:12,187 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-11-07 00:26:12,206 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:26:12,210 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:26:12,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:26:12,258 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:26:12,259 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:26:12,259 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:26:12,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:26:12,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:26:12,261 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:26:12,261 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:26:12,261 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:26:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-11-07 00:26:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 00:26:12,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:12,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:12,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -559339146, now seen corresponding path program 1 times [2020-11-07 00:26:12,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:12,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342903224] [2020-11-07 00:26:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:12,428 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:12,830 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 00:26:12,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342903224] [2020-11-07 00:26:12,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:12,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:26:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913742079] [2020-11-07 00:26:12,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:26:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:26:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:26:12,859 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 8 states. [2020-11-07 00:26:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:13,432 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-11-07 00:26:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:26:13,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-07 00:26:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:13,455 INFO L225 Difference]: With dead ends: 73 [2020-11-07 00:26:13,456 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 00:26:13,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:26:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 00:26:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-07 00:26:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 00:26:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-11-07 00:26:13,520 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2020-11-07 00:26:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:13,521 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-11-07 00:26:13,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:26:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-11-07 00:26:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:26:13,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:13,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:13,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:26:13,525 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1934950555, now seen corresponding path program 1 times [2020-11-07 00:26:13,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:13,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132330369] [2020-11-07 00:26:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:13,529 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,674 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 00:26:13,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132330369] [2020-11-07 00:26:13,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:13,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:26:13,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682269231] [2020-11-07 00:26:13,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:26:13,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:26:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:26:13,678 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2020-11-07 00:26:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:14,034 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-11-07 00:26:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:26:14,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-11-07 00:26:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:14,037 INFO L225 Difference]: With dead ends: 56 [2020-11-07 00:26:14,037 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 00:26:14,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:26:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 00:26:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-11-07 00:26:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 00:26:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-11-07 00:26:14,056 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2020-11-07 00:26:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:14,056 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-11-07 00:26:14,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:26:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-11-07 00:26:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 00:26:14,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:14,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:14,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:26:14,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:14,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1765277799, now seen corresponding path program 1 times [2020-11-07 00:26:14,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:14,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120966103] [2020-11-07 00:26:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:14,063 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 00:26:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120966103] [2020-11-07 00:26:14,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:14,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:26:14,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338558297] [2020-11-07 00:26:14,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:26:14,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:26:14,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:26:14,227 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 8 states. [2020-11-07 00:26:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:14,622 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-11-07 00:26:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:26:14,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-11-07 00:26:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:14,625 INFO L225 Difference]: With dead ends: 66 [2020-11-07 00:26:14,625 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 00:26:14,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:26:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 00:26:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-07 00:26:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 00:26:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-11-07 00:26:14,643 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 44 [2020-11-07 00:26:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:14,643 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-11-07 00:26:14,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:26:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-11-07 00:26:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 00:26:14,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:14,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:14,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:26:14,646 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1722820979, now seen corresponding path program 1 times [2020-11-07 00:26:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:14,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135372921] [2020-11-07 00:26:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:14,650 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 00:26:14,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135372921] [2020-11-07 00:26:14,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:14,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:26:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152550004] [2020-11-07 00:26:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:26:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:26:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:14,882 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 9 states. [2020-11-07 00:26:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:15,412 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-11-07 00:26:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:26:15,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-11-07 00:26:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:15,415 INFO L225 Difference]: With dead ends: 66 [2020-11-07 00:26:15,415 INFO L226 Difference]: Without dead ends: 48 [2020-11-07 00:26:15,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:26:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-07 00:26:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-11-07 00:26:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-07 00:26:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-11-07 00:26:15,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 44 [2020-11-07 00:26:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:15,431 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-11-07 00:26:15,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:26:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-11-07 00:26:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 00:26:15,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:15,433 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:15,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:26:15,434 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -738326546, now seen corresponding path program 1 times [2020-11-07 00:26:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:15,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126639929] [2020-11-07 00:26:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:15,438 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:15,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:15,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-07 00:26:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126639929] [2020-11-07 00:26:15,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:15,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:26:15,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232136607] [2020-11-07 00:26:15,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:26:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:26:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:26:15,572 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 8 states. [2020-11-07 00:26:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:16,070 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-07 00:26:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:26:16,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-07 00:26:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:16,073 INFO L225 Difference]: With dead ends: 58 [2020-11-07 00:26:16,074 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 00:26:16,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:26:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 00:26:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-07 00:26:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 00:26:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-11-07 00:26:16,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 45 [2020-11-07 00:26:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:16,125 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-11-07 00:26:16,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:26:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-11-07 00:26:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 00:26:16,134 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:16,135 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:16,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:26:16,135 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1742986130, now seen corresponding path program 1 times [2020-11-07 00:26:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129672725] [2020-11-07 00:26:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:16,142 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-07 00:26:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129672725] [2020-11-07 00:26:16,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:16,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:26:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051499998] [2020-11-07 00:26:16,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:26:16,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:26:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:26:16,368 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 8 states. [2020-11-07 00:26:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:16,857 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-11-07 00:26:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:26:16,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-07 00:26:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:16,860 INFO L225 Difference]: With dead ends: 63 [2020-11-07 00:26:16,860 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 00:26:16,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:26:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 00:26:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-07 00:26:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 00:26:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-11-07 00:26:16,877 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 45 [2020-11-07 00:26:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:16,878 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-11-07 00:26:16,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:26:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-11-07 00:26:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-07 00:26:16,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:16,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:26:16,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:26:16,882 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1509136149, now seen corresponding path program 1 times [2020-11-07 00:26:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:16,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101172497] [2020-11-07 00:26:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:16,885 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:26:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-07 00:26:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:26:17,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101172497] [2020-11-07 00:26:17,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:17,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:26:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843624847] [2020-11-07 00:26:17,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:26:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:26:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:26:17,088 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 9 states. [2020-11-07 00:26:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:17,637 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-11-07 00:26:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:26:17,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-11-07 00:26:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:17,638 INFO L225 Difference]: With dead ends: 56 [2020-11-07 00:26:17,638 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:26:17,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:26:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:26:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:26:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:26:17,641 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2020-11-07 00:26:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:17,641 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:26:17,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:26:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:26:17,641 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:26:17,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:26:17,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:26:18,982 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2020-11-07 00:26:19,113 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2020-11-07 00:26:19,389 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,389 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,389 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,389 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,390 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,391 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 00:26:19,391 INFO L269 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,391 INFO L269 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-11-07 00:26:19,393 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,394 INFO L262 CegarLoopResult]: At program point gcdFINAL(lines 17 28) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-11-07 00:26:19,394 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,394 INFO L262 CegarLoopResult]: At program point gcdEXIT(lines 17 28) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L24(lines 24 26) the Hoare annotation is: (and (not (= gcd_~y1 gcd_~y2)) (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2020-11-07 00:26:19,395 INFO L262 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (and (<= 1 |gcd_#res|) (<= 1 |gcd_#t~ret8|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,396 INFO L269 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-11-07 00:26:19,396 INFO L262 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2020-11-07 00:26:19,396 INFO L262 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,396 INFO L262 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= 1 |gcd_#res|) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret7|)) [2020-11-07 00:26:19,396 INFO L262 CegarLoopResult]: At program point L21(lines 21 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-07 00:26:19,397 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-11-07 00:26:19,397 INFO L262 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-11-07 00:26:19,397 INFO L262 CegarLoopResult]: At program point L17(lines 17 28) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2020-11-07 00:26:19,397 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,397 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,397 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,397 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 00:26:19,397 INFO L269 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-11-07 00:26:19,398 INFO L262 CegarLoopResult]: At program point L35-2(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-11-07 00:26:19,398 INFO L269 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-11-07 00:26:19,398 INFO L269 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-11-07 00:26:19,398 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 30 45) the Hoare annotation is: true [2020-11-07 00:26:19,398 INFO L262 CegarLoopResult]: At program point L40(lines 40 44) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,398 INFO L269 CegarLoopResult]: At program point L40-1(lines 30 45) the Hoare annotation is: true [2020-11-07 00:26:19,399 INFO L262 CegarLoopResult]: At program point L36(lines 36 38) the Hoare annotation is: (<= 1 main_~m~0) [2020-11-07 00:26:19,399 INFO L269 CegarLoopResult]: At program point L32(lines 32 34) the Hoare annotation is: true [2020-11-07 00:26:19,399 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2020-11-07 00:26:19,399 INFO L262 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,399 INFO L262 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: false [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (<= 1 main_~m~0) [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L39-2(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,400 INFO L262 CegarLoopResult]: At program point L39-3(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2020-11-07 00:26:19,401 INFO L262 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-11-07 00:26:19,401 INFO L262 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-11-07 00:26:19,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:26:19 BoogieIcfgContainer [2020-11-07 00:26:19,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:26:19,433 INFO L168 Benchmark]: Toolchain (without parser) took 8150.59 ms. Allocated memory was 154.1 MB in the beginning and 232.8 MB in the end (delta: 78.6 MB). Free memory was 113.2 MB in the beginning and 172.9 MB in the end (delta: -59.7 MB). Peak memory consumption was 113.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:19,441 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 154.1 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:26:19,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.96 ms. Allocated memory is still 154.1 MB. Free memory was 112.5 MB in the beginning and 131.6 MB in the end (delta: -19.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:19,444 INFO L168 Benchmark]: Boogie Preprocessor took 32.01 ms. Allocated memory is still 154.1 MB. Free memory was 131.6 MB in the beginning and 130.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:19,445 INFO L168 Benchmark]: RCFGBuilder took 578.00 ms. Allocated memory is still 154.1 MB. Free memory was 130.0 MB in the beginning and 123.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:19,446 INFO L168 Benchmark]: TraceAbstraction took 7257.70 ms. Allocated memory was 154.1 MB in the beginning and 232.8 MB in the end (delta: 78.6 MB). Free memory was 122.6 MB in the beginning and 172.9 MB in the end (delta: -50.3 MB). Peak memory consumption was 122.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:26:19,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 154.1 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.96 ms. Allocated memory is still 154.1 MB. Free memory was 112.5 MB in the beginning and 131.6 MB in the end (delta: -19.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.01 ms. Allocated memory is still 154.1 MB. Free memory was 131.6 MB in the beginning and 130.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.00 ms. Allocated memory is still 154.1 MB. Free memory was 130.0 MB in the beginning and 123.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7257.70 ms. Allocated memory was 154.1 MB in the beginning and 232.8 MB in the end (delta: 78.6 MB). Free memory was 122.6 MB in the beginning and 172.9 MB in the end (delta: -50.3 MB). Peak memory consumption was 122.7 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: 17]: Procedure Contract for gcd Derived contract for procedure gcd: (((\old(y2) <= 0 || \old(y1) <= 0) && y2 == \old(y2)) && y1 == \old(y1)) || ((1 <= \result && y2 == \old(y2)) && y1 == \old(y1)) - ProcedureContractResult [Line: 30]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 428 SDslu, 485 SDs, 0 SdLazy, 1015 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 55 LocationsWithAnnotation, 113 PreInvPairs, 175 NumberOfFragments, 383 HoareAnnotationTreeSize, 113 FomulaSimplifications, 6110 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 55 FomulaSimplificationsInter, 1851 FormulaSimplificationTreeSizeReductionInter, 1.1s 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...