/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:02:36,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:02:36,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:02:36,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:02:36,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:02:36,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:02:36,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:02:36,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:02:36,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:02:36,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:02:36,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:02:36,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:02:36,573 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:02:36,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:02:36,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:02:36,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:02:36,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:02:36,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:02:36,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:02:36,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:02:36,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:02:36,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:02:36,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:02:36,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:02:36,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:02:36,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:02:36,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:02:36,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:02:36,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:02:36,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:02:36,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:02:36,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:02:36,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:02:36,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:02:36,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:02:36,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:02:36,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:02:36,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:02:36,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:02:37,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:02:37,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:02:37,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:02:37,010 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:02:37,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-11-06 22:02:37,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4c7885/3e94fb5458514d13b1806b8b04f0e11f/FLAGbda02ae5c [2020-11-06 22:02:37,753 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:02:37,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-11-06 22:02:37,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4c7885/3e94fb5458514d13b1806b8b04f0e11f/FLAGbda02ae5c [2020-11-06 22:02:38,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fe4c7885/3e94fb5458514d13b1806b8b04f0e11f [2020-11-06 22:02:38,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:02:38,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:02:38,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:38,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:02:38,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:02:38,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5068490a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38, skipping insertion in model container [2020-11-06 22:02:38,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:02:38,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:02:38,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:38,347 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:02:38,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:38,381 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:02:38,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38 WrapperNode [2020-11-06 22:02:38,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:38,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:02:38,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:02:38,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:02:38,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (1/1) ... [2020-11-06 22:02:38,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:02:38,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:02:38,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:02:38,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:02:38,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (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 [2020-11-06 22:02:38,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:02:38,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:02:38,518 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:02:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-11-06 22:02:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:02:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:02:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:02:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:02:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:02:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:02:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-11-06 22:02:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:02:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:02:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:02:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:02:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:02:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:02:38,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:02:38,890 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:02:38,891 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:02:38,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:38 BoogieIcfgContainer [2020-11-06 22:02:38,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:02:38,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:02:38,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:02:38,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:02:38,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:38" (1/3) ... [2020-11-06 22:02:38,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5ce274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:38, skipping insertion in model container [2020-11-06 22:02:38,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:38" (2/3) ... [2020-11-06 22:02:38,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5ce274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:38, skipping insertion in model container [2020-11-06 22:02:38,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:38" (3/3) ... [2020-11-06 22:02:38,919 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-11-06 22:02:38,958 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:02:38,968 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:02:39,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:02:39,043 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:02:39,044 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:02:39,044 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:02:39,044 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:02:39,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:02:39,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:02:39,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:02:39,045 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:02:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-06 22:02:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:02:39,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:39,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:39,070 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash -874294957, now seen corresponding path program 1 times [2020-11-06 22:02:39,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:39,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699679805] [2020-11-06 22:02:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:02:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:02:39,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699679805] [2020-11-06 22:02:39,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:39,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:02:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56612516] [2020-11-06 22:02:39,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:02:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:02:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:02:39,586 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-11-06 22:02:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:40,136 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-06 22:02:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:02:40,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-06 22:02:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:40,149 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:02:40,150 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:02:40,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:02:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:02:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-06 22:02:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:02:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-06 22:02:40,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-11-06 22:02:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:40,209 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-06 22:02:40,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:02:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-06 22:02:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:02:40,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:40,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:40,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:02:40,212 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1992247557, now seen corresponding path program 1 times [2020-11-06 22:02:40,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:40,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905658462] [2020-11-06 22:02:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:40,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:02:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:40,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:02:40,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905658462] [2020-11-06 22:02:40,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767579951] [2020-11-06 22:02:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:02:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:02:40,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:40,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-11-06 22:02:40,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283647261] [2020-11-06 22:02:40,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:02:40,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:02:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:02:40,779 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2020-11-06 22:02:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:41,187 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-06 22:02:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:02:41,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-11-06 22:02:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:41,190 INFO L225 Difference]: With dead ends: 29 [2020-11-06 22:02:41,191 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:02:41,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:02:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:02:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-06 22:02:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:02:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-06 22:02:41,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-11-06 22:02:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:41,213 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-06 22:02:41,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:02:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-06 22:02:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:02:41,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:41,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:41,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:02:41,418 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1177737683, now seen corresponding path program 2 times [2020-11-06 22:02:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:41,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219164548] [2020-11-06 22:02:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:41,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:02:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:41,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:02:41,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219164548] [2020-11-06 22:02:41,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353921382] [2020-11-06 22:02:41,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:41,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:02:41,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:41,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 22:02:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:02:41,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:41,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-11-06 22:02:41,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179753662] [2020-11-06 22:02:41,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:02:41,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:02:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:02:41,958 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 19 states. [2020-11-06 22:02:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:42,737 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-11-06 22:02:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:02:42,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-11-06 22:02:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:42,739 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:02:42,739 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:02:42,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:02:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:02:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:02:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:02:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-06 22:02:42,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2020-11-06 22:02:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:42,749 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-06 22:02:42,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:02:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-06 22:02:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 22:02:42,751 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:42,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:42,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:42,965 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1203654061, now seen corresponding path program 3 times [2020-11-06 22:02:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:42,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651310595] [2020-11-06 22:02:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:02:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:02:43,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651310595] [2020-11-06 22:02:43,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325849407] [2020-11-06 22:02:43,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:43,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:02:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:02:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:02:44,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:02:44,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2020-11-06 22:02:44,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798275741] [2020-11-06 22:02:44,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:02:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:02:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:02:44,086 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-11-06 22:02:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:44,170 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-06 22:02:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:02:44,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-11-06 22:02:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:44,171 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:02:44,171 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:02:44,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:02:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:02:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:02:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:02:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:02:44,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-11-06 22:02:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:44,175 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:02:44,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:02:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:02:44,175 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:02:44,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:44,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:02:44,494 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:02:44,494 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:02:44,495 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:02:44,495 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:02:44,495 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:44,495 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|)) [2020-11-06 22:02:44,495 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:44,496 INFO L266 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-11-06 22:02:44,496 INFO L269 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-11-06 22:02:44,496 INFO L266 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-11-06 22:02:44,497 INFO L262 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-11-06 22:02:44,497 INFO L266 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-06 22:02:44,497 INFO L266 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-11-06 22:02:44,497 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:44,497 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:02:44,497 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:02:44,498 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:44,498 INFO L266 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-11-06 22:02:44,498 INFO L262 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= main_~n~0 31) [2020-11-06 22:02:44,498 INFO L266 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-11-06 22:02:44,498 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-11-06 22:02:44,498 INFO L266 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-06 22:02:44,499 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 26 37) no Hoare annotation was computed. [2020-11-06 22:02:44,499 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 26 37) no Hoare annotation was computed. [2020-11-06 22:02:44,499 INFO L262 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: false [2020-11-06 22:02:44,499 INFO L266 CegarLoopResult]: For program point L35-1(line 35) no Hoare annotation was computed. [2020-11-06 22:02:44,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:02:44 BoogieIcfgContainer [2020-11-06 22:02:44,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:02:44,508 INFO L168 Benchmark]: Toolchain (without parser) took 6363.74 ms. Allocated memory was 152.0 MB in the beginning and 225.4 MB in the end (delta: 73.4 MB). Free memory was 128.5 MB in the beginning and 189.0 MB in the end (delta: -60.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:44,509 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:02:44,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.47 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 118.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:44,511 INFO L168 Benchmark]: Boogie Preprocessor took 34.52 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:44,512 INFO L168 Benchmark]: RCFGBuilder took 474.23 ms. Allocated memory is still 152.0 MB. Free memory was 117.4 MB in the beginning and 104.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:44,513 INFO L168 Benchmark]: TraceAbstraction took 5603.96 ms. Allocated memory was 152.0 MB in the beginning and 225.4 MB in the end (delta: 73.4 MB). Free memory was 104.4 MB in the beginning and 189.0 MB in the end (delta: -84.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:02:44,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.47 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 118.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.52 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 474.23 ms. Allocated memory is still 152.0 MB. Free memory was 117.4 MB in the beginning and 104.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5603.96 ms. Allocated memory was 152.0 MB in the beginning and 225.4 MB in the end (delta: 73.4 MB). Free memory was 104.4 MB in the beginning and 189.0 MB in the end (delta: -84.6 MB). There was no memory consumed. 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 60 SDslu, 225 SDs, 0 SdLazy, 455 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 43 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 25215 SizeOfPredicates, 11 NumberOfNonLiveVariables, 401 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 96/140 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...