/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:38:39,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:38:39,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:38:39,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:38:39,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:38:39,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:38:39,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:38:39,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:38:39,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:38:39,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:38:39,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:38:39,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:38:39,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:38:39,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:38:39,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:38:39,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:38:39,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:38:39,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:38:39,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:38:39,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:38:39,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:38:39,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:38:39,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:38:39,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:38:39,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:38:39,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:38:39,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:38:39,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:38:39,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:38:39,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:38:39,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:38:39,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:38:39,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:38:39,798 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:38:39,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:38:39,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:38:39,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:38:39,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:38:39,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:38:39,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:38:39,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:38:40,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:38:40,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:38:40,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:38:40,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:38:40,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:38:40,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-24 00:38:40,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448dbf0d0/0dd4d9183a274bf7b97985c74525a52a/FLAGfb442a619 [2020-10-24 00:38:40,836 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:38:40,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-24 00:38:40,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448dbf0d0/0dd4d9183a274bf7b97985c74525a52a/FLAGfb442a619 [2020-10-24 00:38:41,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448dbf0d0/0dd4d9183a274bf7b97985c74525a52a [2020-10-24 00:38:41,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:38:41,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:38:41,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:38:41,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:38:41,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:38:41,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229e11d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41, skipping insertion in model container [2020-10-24 00:38:41,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:38:41,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:38:41,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:38:41,421 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:38:41,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:38:41,455 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:38:41,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41 WrapperNode [2020-10-24 00:38:41,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:38:41,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:38:41,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:38:41,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:38:41,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... [2020-10-24 00:38:41,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:38:41,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:38:41,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:38:41,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:38:41,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:38:41,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:38:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:38:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:38:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-24 00:38:41,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:38:41,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:38:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:38:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:38:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:38:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:38:41,567 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-24 00:38:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:38:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:38:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:38:41,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:38:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:38:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:38:41,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:38:41,895 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:38:41,895 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:38:41,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:41 BoogieIcfgContainer [2020-10-24 00:38:41,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:38:41,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:38:41,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:38:41,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:38:41,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:38:41" (1/3) ... [2020-10-24 00:38:41,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf6fe69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:41, skipping insertion in model container [2020-10-24 00:38:41,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:41" (2/3) ... [2020-10-24 00:38:41,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf6fe69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:41, skipping insertion in model container [2020-10-24 00:38:41,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:41" (3/3) ... [2020-10-24 00:38:41,924 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-10-24 00:38:41,935 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:38:41,940 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:38:41,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:38:42,007 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:38:42,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:38:42,014 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:38:42,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:38:42,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:38:42,014 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:38:42,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:38:42,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:38:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-24 00:38:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 00:38:42,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:42,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:38:42,062 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash -559339146, now seen corresponding path program 1 times [2020-10-24 00:38:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:42,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308926221] [2020-10-24 00:38:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:42,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:42,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:38:42,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308926221] [2020-10-24 00:38:42,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:42,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 00:38:42,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965803258] [2020-10-24 00:38:42,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:38:42,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:38:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:38:42,731 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 8 states. [2020-10-24 00:38:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:43,215 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-10-24 00:38:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 00:38:43,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-24 00:38:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:43,228 INFO L225 Difference]: With dead ends: 73 [2020-10-24 00:38:43,228 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 00:38:43,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-24 00:38:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 00:38:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-24 00:38:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 00:38:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-24 00:38:43,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2020-10-24 00:38:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:43,289 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-24 00:38:43,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:38:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-24 00:38:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 00:38:43,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:43,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:38:43,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:38:43,293 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1934950555, now seen corresponding path program 1 times [2020-10-24 00:38:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:43,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674746027] [2020-10-24 00:38:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:38:43,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674746027] [2020-10-24 00:38:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 00:38:43,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120887191] [2020-10-24 00:38:43,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 00:38:43,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:43,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 00:38:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 00:38:43,427 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2020-10-24 00:38:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:43,769 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-24 00:38:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 00:38:43,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-24 00:38:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:43,771 INFO L225 Difference]: With dead ends: 56 [2020-10-24 00:38:43,772 INFO L226 Difference]: Without dead ends: 49 [2020-10-24 00:38:43,773 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 [2020-10-24 00:38:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-24 00:38:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-24 00:38:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 00:38:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-24 00:38:43,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2020-10-24 00:38:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:43,791 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-24 00:38:43,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 00:38:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-24 00:38:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 00:38:43,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:43,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:38:43,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:38:43,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1765277799, now seen corresponding path program 1 times [2020-10-24 00:38:43,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:43,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203356203] [2020-10-24 00:38:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:38:44,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203356203] [2020-10-24 00:38:44,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:44,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 00:38:44,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754407963] [2020-10-24 00:38:44,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:38:44,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:38:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:38:44,009 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 8 states. [2020-10-24 00:38:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:44,320 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-24 00:38:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 00:38:44,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-24 00:38:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:44,322 INFO L225 Difference]: With dead ends: 66 [2020-10-24 00:38:44,322 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 00:38:44,323 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 [2020-10-24 00:38:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 00:38:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-24 00:38:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 00:38:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-24 00:38:44,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 44 [2020-10-24 00:38:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:44,341 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-24 00:38:44,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:38:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-24 00:38:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 00:38:44,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:44,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:38:44,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:38:44,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1722820979, now seen corresponding path program 1 times [2020-10-24 00:38:44,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:44,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40124221] [2020-10-24 00:38:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:38:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40124221] [2020-10-24 00:38:44,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:44,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 00:38:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485065606] [2020-10-24 00:38:44,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:38:44,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:38:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:38:44,487 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 9 states. [2020-10-24 00:38:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:44,859 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-24 00:38:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 00:38:44,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-24 00:38:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:44,862 INFO L225 Difference]: With dead ends: 66 [2020-10-24 00:38:44,862 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 00:38:44,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-24 00:38:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 00:38:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-24 00:38:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 00:38:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-24 00:38:44,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 44 [2020-10-24 00:38:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:44,879 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-24 00:38:44,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:38:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-24 00:38:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 00:38:44,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:44,881 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] [2020-10-24 00:38:44,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:38:44,882 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -738326546, now seen corresponding path program 1 times [2020-10-24 00:38:44,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:44,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112681055] [2020-10-24 00:38:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-24 00:38:44,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112681055] [2020-10-24 00:38:44,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:44,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 00:38:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280081448] [2020-10-24 00:38:44,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:38:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:44,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:38:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:38:44,988 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 8 states. [2020-10-24 00:38:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:45,384 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-24 00:38:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:38:45,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-24 00:38:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:45,387 INFO L225 Difference]: With dead ends: 58 [2020-10-24 00:38:45,387 INFO L226 Difference]: Without dead ends: 51 [2020-10-24 00:38:45,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-24 00:38:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-24 00:38:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-24 00:38:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-24 00:38:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-24 00:38:45,416 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 45 [2020-10-24 00:38:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:45,417 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-24 00:38:45,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:38:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-24 00:38:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 00:38:45,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:45,422 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] [2020-10-24 00:38:45,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 00:38:45,425 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1742986130, now seen corresponding path program 1 times [2020-10-24 00:38:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:45,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543505257] [2020-10-24 00:38:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-24 00:38:45,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543505257] [2020-10-24 00:38:45,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:45,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 00:38:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423292396] [2020-10-24 00:38:45,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 00:38:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 00:38:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 00:38:45,599 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 8 states. [2020-10-24 00:38:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:45,978 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-24 00:38:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:38:45,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-24 00:38:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:45,981 INFO L225 Difference]: With dead ends: 63 [2020-10-24 00:38:45,982 INFO L226 Difference]: Without dead ends: 56 [2020-10-24 00:38:45,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-24 00:38:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-24 00:38:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-24 00:38:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-24 00:38:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-24 00:38:46,003 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 45 [2020-10-24 00:38:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:46,003 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-24 00:38:46,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 00:38:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-24 00:38:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-24 00:38:46,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:38:46,006 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] [2020-10-24 00:38:46,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 00:38:46,007 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:38:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:38:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1509136149, now seen corresponding path program 1 times [2020-10-24 00:38:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:38:46,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443299045] [2020-10-24 00:38:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:38:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:38:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 00:38:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-24 00:38:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:38:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-24 00:38:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443299045] [2020-10-24 00:38:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:38:46,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 00:38:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970989345] [2020-10-24 00:38:46,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 00:38:46,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:38:46,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 00:38:46,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-24 00:38:46,194 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 9 states. [2020-10-24 00:38:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:38:46,603 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-24 00:38:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 00:38:46,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-24 00:38:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:38:46,604 INFO L225 Difference]: With dead ends: 56 [2020-10-24 00:38:46,604 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 00:38:46,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-24 00:38:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 00:38:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 00:38:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 00:38:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 00:38:46,607 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2020-10-24 00:38:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:38:46,607 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 00:38:46,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 00:38:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 00:38:46,608 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 00:38:46,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 00:38:46,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 00:38:47,703 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2020-10-24 00:38:47,989 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,989 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,990 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,991 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,991 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,991 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-24 00:38:47,991 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,991 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-24 00:38:47,991 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,992 INFO L270 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))) [2020-10-24 00:38:47,992 INFO L270 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)) [2020-10-24 00:38:47,992 INFO L270 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))) [2020-10-24 00:38:47,992 INFO L270 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)) [2020-10-24 00:38:47,993 INFO L270 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|)) [2020-10-24 00:38:47,993 INFO L270 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)) [2020-10-24 00:38:47,993 INFO L270 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)) [2020-10-24 00:38:47,993 INFO L270 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|)) [2020-10-24 00:38:47,993 INFO L270 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)) [2020-10-24 00:38:47,994 INFO L277 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-10-24 00:38:47,994 INFO L270 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|)) [2020-10-24 00:38:47,994 INFO L270 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)) [2020-10-24 00:38:47,994 INFO L270 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|)) [2020-10-24 00:38:47,994 INFO L270 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)) [2020-10-24 00:38:47,994 INFO L270 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|)) [2020-10-24 00:38:47,994 INFO L270 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-10-24 00:38:47,995 INFO L270 CegarLoopResult]: At program point L17(lines 17 28) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-24 00:38:47,995 INFO L270 CegarLoopResult]: At program point L35-2(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-10-24 00:38:47,995 INFO L277 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-10-24 00:38:47,996 INFO L277 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-10-24 00:38:47,996 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 30 45) the Hoare annotation is: true [2020-10-24 00:38:47,996 INFO L270 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)) [2020-10-24 00:38:47,996 INFO L277 CegarLoopResult]: At program point L40-1(lines 30 45) the Hoare annotation is: true [2020-10-24 00:38:47,996 INFO L270 CegarLoopResult]: At program point L36(lines 36 38) the Hoare annotation is: (<= 1 main_~m~0) [2020-10-24 00:38:47,996 INFO L277 CegarLoopResult]: At program point L32(lines 32 34) the Hoare annotation is: true [2020-10-24 00:38:47,996 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2020-10-24 00:38:47,997 INFO L270 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-10-24 00:38:47,997 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-10-24 00:38:47,997 INFO L270 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: false [2020-10-24 00:38:47,997 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-10-24 00:38:47,997 INFO L270 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)) [2020-10-24 00:38:47,997 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (<= 1 main_~m~0) [2020-10-24 00:38:47,998 INFO L270 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)) [2020-10-24 00:38:47,998 INFO L270 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)) [2020-10-24 00:38:47,998 INFO L270 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-10-24 00:38:47,998 INFO L270 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-10-24 00:38:48,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:38:48 BoogieIcfgContainer [2020-10-24 00:38:48,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:38:48,019 INFO L168 Benchmark]: Toolchain (without parser) took 6797.73 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.6 MB in the beginning and 84.2 MB in the end (delta: 43.3 MB). Peak memory consumption was 119.8 MB. Max. memory is 8.0 GB. [2020-10-24 00:38:48,020 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 143.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:38:48,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:38:48,022 INFO L168 Benchmark]: Boogie Preprocessor took 30.90 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:38:48,022 INFO L168 Benchmark]: RCFGBuilder took 409.02 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 100.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-24 00:38:48,023 INFO L168 Benchmark]: TraceAbstraction took 6103.20 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 100.1 MB in the beginning and 84.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. [2020-10-24 00:38:48,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 124.4 MB in the end (delta: 143.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 224.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.90 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.02 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 100.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6103.20 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 100.1 MB in the beginning and 84.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 91.5 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: 4.6s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 428 SDslu, 485 SDs, 0 SdLazy, 1015 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s 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, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 41/41 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...