/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:36:49,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:36:49,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:36:49,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:36:49,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:36:49,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:36:49,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:36:49,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:36:49,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:36:49,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:36:49,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:36:49,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:36:49,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:36:49,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:36:49,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:36:49,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:36:49,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:36:49,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:36:49,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:36:49,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:36:49,930 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 [2020-07-20 03:36:49,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:36:49,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:36:49,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:36:49,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:36:49,947 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:36:49,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:36:49,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:36:49,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:36:49,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:36:49,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:36:49,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:36:49,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:36:49,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:36:49,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:36:49,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:36:49,950 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:36:49,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:36:49,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:36:49,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:36:49,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:36:49,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:36:49,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:36:49,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:36:49,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:36:49,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:36:49,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:36:49,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:36:49,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:36:49,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:36:49,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:36:50,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:36:50,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:36:50,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:36:50,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:36:50,295 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:36:50,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-20 03:36:50,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e604ab532/10b84987b20649699c0353821672081c/FLAG0ef07e3eb [2020-07-20 03:36:50,890 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:36:50,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-20 03:36:50,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e604ab532/10b84987b20649699c0353821672081c/FLAG0ef07e3eb [2020-07-20 03:36:51,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e604ab532/10b84987b20649699c0353821672081c [2020-07-20 03:36:51,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:36:51,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:36:51,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:36:51,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:36:51,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:36:51,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526855d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51, skipping insertion in model container [2020-07-20 03:36:51,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:36:51,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:36:51,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:36:51,448 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:36:51,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:36:51,479 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:36:51,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51 WrapperNode [2020-07-20 03:36:51,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:36:51,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:36:51,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:36:51,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:36:51,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (1/1) ... [2020-07-20 03:36:51,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:36:51,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:36:51,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:36:51,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:36:51,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (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 [2020-07-20 03:36:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:36:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:36:51,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:36:51,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:36:51,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 03:36:51,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:36:51,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-20 03:36:51,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:36:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:36:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:36:51,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:36:51,957 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 03:36:51,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:36:51 BoogieIcfgContainer [2020-07-20 03:36:51,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:36:51,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:36:51,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:36:51,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:36:51,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:36:51" (1/3) ... [2020-07-20 03:36:51,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b146ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:36:51, skipping insertion in model container [2020-07-20 03:36:51,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:36:51" (2/3) ... [2020-07-20 03:36:51,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b146ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:36:51, skipping insertion in model container [2020-07-20 03:36:51,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:36:51" (3/3) ... [2020-07-20 03:36:51,982 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-07-20 03:36:52,010 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:36:52,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:36:52,037 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:36:52,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:36:52,060 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:36:52,060 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:36:52,061 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:36:52,061 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:36:52,061 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:36:52,061 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:36:52,061 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:36:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 03:36:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 03:36:52,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,087 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2134687016, now seen corresponding path program 1 times [2020-07-20 03:36:52,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216206529] [2020-07-20 03:36:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216206529] [2020-07-20 03:36:52,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:52,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339338283] [2020-07-20 03:36:52,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:52,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,289 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-07-20 03:36:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,445 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-07-20 03:36:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:52,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 03:36:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,471 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:36:52,471 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:36:52,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:36:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:36:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:36:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-07-20 03:36:52,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 8 [2020-07-20 03:36:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,545 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-07-20 03:36:52,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-07-20 03:36:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:36:52,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:36:52,551 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1966827798, now seen corresponding path program 1 times [2020-07-20 03:36:52,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393925958] [2020-07-20 03:36:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393925958] [2020-07-20 03:36:52,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:52,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041056223] [2020-07-20 03:36:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:52,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,596 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 3 states. [2020-07-20 03:36:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,672 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2020-07-20 03:36:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:52,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 03:36:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,675 INFO L225 Difference]: With dead ends: 87 [2020-07-20 03:36:52,675 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 03:36:52,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 03:36:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-07-20 03:36:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 03:36:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-07-20 03:36:52,688 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 13 [2020-07-20 03:36:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,688 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-07-20 03:36:52,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-07-20 03:36:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:36:52,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,690 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:36:52,690 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1966887380, now seen corresponding path program 1 times [2020-07-20 03:36:52,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80388311] [2020-07-20 03:36:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:36:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80388311] [2020-07-20 03:36:52,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:52,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475398597] [2020-07-20 03:36:52,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:52,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,729 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 3 states. [2020-07-20 03:36:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,792 INFO L93 Difference]: Finished difference Result 93 states and 130 transitions. [2020-07-20 03:36:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:52,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 03:36:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,794 INFO L225 Difference]: With dead ends: 93 [2020-07-20 03:36:52,794 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 03:36:52,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 03:36:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 03:36:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 03:36:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2020-07-20 03:36:52,809 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 13 [2020-07-20 03:36:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,809 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2020-07-20 03:36:52,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2020-07-20 03:36:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 03:36:52,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 03:36:52,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,812 INFO L82 PathProgramCache]: Analyzing trace with hash 280007728, now seen corresponding path program 1 times [2020-07-20 03:36:52,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42118248] [2020-07-20 03:36:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 03:36:52,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42118248] [2020-07-20 03:36:52,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:52,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478701130] [2020-07-20 03:36:52,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:52,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,849 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand 3 states. [2020-07-20 03:36:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:52,907 INFO L93 Difference]: Finished difference Result 137 states and 187 transitions. [2020-07-20 03:36:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:52,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 03:36:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:52,910 INFO L225 Difference]: With dead ends: 137 [2020-07-20 03:36:52,910 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 03:36:52,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 03:36:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-07-20 03:36:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 03:36:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 123 transitions. [2020-07-20 03:36:52,926 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 123 transitions. Word has length 20 [2020-07-20 03:36:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:52,927 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 123 transitions. [2020-07-20 03:36:52,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 123 transitions. [2020-07-20 03:36:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 03:36:52,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:52,928 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:52,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 03:36:52,929 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash 885328029, now seen corresponding path program 1 times [2020-07-20 03:36:52,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:52,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278502867] [2020-07-20 03:36:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 03:36:52,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278502867] [2020-07-20 03:36:52,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:52,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:52,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031066731] [2020-07-20 03:36:52,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:52,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:52,973 INFO L87 Difference]: Start difference. First operand 91 states and 123 transitions. Second operand 3 states. [2020-07-20 03:36:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:53,031 INFO L93 Difference]: Finished difference Result 181 states and 245 transitions. [2020-07-20 03:36:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:53,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 03:36:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:53,033 INFO L225 Difference]: With dead ends: 181 [2020-07-20 03:36:53,033 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 03:36:53,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 03:36:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-20 03:36:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 03:36:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2020-07-20 03:36:53,047 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 23 [2020-07-20 03:36:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:53,049 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2020-07-20 03:36:53,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2020-07-20 03:36:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:36:53,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:53,051 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:53,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 03:36:53,052 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1155086362, now seen corresponding path program 1 times [2020-07-20 03:36:53,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:53,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848124084] [2020-07-20 03:36:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2fff7f95 [2020-07-20 03:36:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:36:53,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848124084] [2020-07-20 03:36:53,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:36:53,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:36:53,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725786506] [2020-07-20 03:36:53,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:36:53,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:36:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:53,106 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 3 states. [2020-07-20 03:36:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:53,125 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-07-20 03:36:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:36:53,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 03:36:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:53,126 INFO L225 Difference]: With dead ends: 124 [2020-07-20 03:36:53,126 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:36:53,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:36:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:36:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:36:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:36:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:36:53,129 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-07-20 03:36:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:53,129 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:36:53,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:36:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:36:53,130 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:36:53,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 03:36:53,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:36:53,317 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:36:53,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:53,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:53,317 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:36:53,318 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:36:53,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:36:53,318 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 140) no Hoare annotation was computed. [2020-07-20 03:36:53,318 INFO L268 CegarLoopResult]: For program point L77-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 03:36:53,318 INFO L268 CegarLoopResult]: For program point L69(lines 69 73) no Hoare annotation was computed. [2020-07-20 03:36:53,318 INFO L268 CegarLoopResult]: For program point L24(lines 24 127) no Hoare annotation was computed. [2020-07-20 03:36:53,319 INFO L268 CegarLoopResult]: For program point L57-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 03:36:53,319 INFO L268 CegarLoopResult]: For program point L49(lines 49 108) no Hoare annotation was computed. [2020-07-20 03:36:53,319 INFO L268 CegarLoopResult]: For program point L45(lines 45 110) no Hoare annotation was computed. [2020-07-20 03:36:53,319 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-07-20 03:36:53,319 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-20 03:36:53,320 INFO L268 CegarLoopResult]: For program point L95(lines 95 97) no Hoare annotation was computed. [2020-07-20 03:36:53,320 INFO L268 CegarLoopResult]: For program point L29(lines 29 124) no Hoare annotation was computed. [2020-07-20 03:36:53,320 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-20 03:36:53,320 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3)))) [2020-07-20 03:36:53,320 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-20 03:36:53,321 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 140) no Hoare annotation was computed. [2020-07-20 03:36:53,321 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-07-20 03:36:53,321 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) no Hoare annotation was computed. [2020-07-20 03:36:53,321 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-20 03:36:53,321 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-07-20 03:36:53,322 INFO L268 CegarLoopResult]: For program point L92-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 03:36:53,322 INFO L268 CegarLoopResult]: For program point L88-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 03:36:53,322 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 03:36:53,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:36:53 BoogieIcfgContainer [2020-07-20 03:36:53,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:36:53,347 INFO L168 Benchmark]: Toolchain (without parser) took 2122.23 ms. Allocated memory was 136.8 MB in the beginning and 231.2 MB in the end (delta: 94.4 MB). Free memory was 101.5 MB in the beginning and 189.2 MB in the end (delta: -87.7 MB). Peak memory consumption was 87.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,348 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.29 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,350 INFO L168 Benchmark]: Boogie Preprocessor took 119.01 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,351 INFO L168 Benchmark]: RCFGBuilder took 362.59 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 164.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,352 INFO L168 Benchmark]: TraceAbstraction took 1369.72 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 164.5 MB in the beginning and 189.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:53,356 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.29 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.01 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.59 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 164.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1369.72 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 164.5 MB in the beginning and 189.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: 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 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (8656 <= s__state && blastFlag <= 2) || ((8656 <= s__state && !(0 == s__hit)) && blastFlag <= 3) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 92 SDslu, 109 SDs, 0 SdLazy, 95 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=4, 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, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 34 NumberOfFragments, 65 HoareAnnotationTreeSize, 11 FomulaSimplifications, 175 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 4626 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 42/42 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...