/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:09:50,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:09:50,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:09:50,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:09:50,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:09:50,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:09:50,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:09:50,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:09:50,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:09:50,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:09:50,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:09:50,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:09:50,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:09:50,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:09:50,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:09:50,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:09:50,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:09:50,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:09:50,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:09:50,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:09:50,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:09:50,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:09:50,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:09:50,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:09:50,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:09:50,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:09:50,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:09:50,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:09:50,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:09:50,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:09:50,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:09:50,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:09:50,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:09:50,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:09:50,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:09:50,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:09:50,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:09:50,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:09:50,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:09:50,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:09:50,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:09:50,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:09:50,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:09:50,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:09:50,152 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:09:50,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:09:50,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:09:50,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:09:50,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:09:50,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:09:50,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:09:50,154 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:09:50,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:09:50,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:09:50,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:09:50,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:09:50,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:09:50,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-22 22:09:50,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b59d5bfac/1b75cafbd74445f4a97c3e662c888580/FLAG0a2097d97 [2020-08-22 22:09:51,338 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:09:51,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-22 22:09:51,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b59d5bfac/1b75cafbd74445f4a97c3e662c888580/FLAG0a2097d97 [2020-08-22 22:09:51,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b59d5bfac/1b75cafbd74445f4a97c3e662c888580 [2020-08-22 22:09:51,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:09:51,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:09:51,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:09:51,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:09:51,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:09:51,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:51,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71172dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51, skipping insertion in model container [2020-08-22 22:09:51,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:51,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:09:51,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:09:51,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:09:51,898 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:09:51,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:09:51,940 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:09:51,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51 WrapperNode [2020-08-22 22:09:51,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:09:51,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:09:51,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:09:51,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:09:51,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:51,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:51,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:51,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:52,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:52,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:52,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (1/1) ... [2020-08-22 22:09:52,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:09:52,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:09:52,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:09:52,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:09:52,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (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 [2020-08-22 22:09:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:09:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:09:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:09:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 22:09:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:09:52,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:09:52,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:09:52,439 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:09:52,441 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:09:52,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:09:52 BoogieIcfgContainer [2020-08-22 22:09:52,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:09:52,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:09:52,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:09:52,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:09:52,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:09:51" (1/3) ... [2020-08-22 22:09:52,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6961da01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:09:52, skipping insertion in model container [2020-08-22 22:09:52,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:09:51" (2/3) ... [2020-08-22 22:09:52,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6961da01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:09:52, skipping insertion in model container [2020-08-22 22:09:52,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:09:52" (3/3) ... [2020-08-22 22:09:52,487 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-08-22 22:09:52,498 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:09:52,506 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:09:52,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:09:52,550 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:09:52,550 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:09:52,550 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:09:52,551 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:09:52,551 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:09:52,551 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:09:52,551 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:09:52,551 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:09:52,569 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 22:09:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:09:52,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:52,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:52,586 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-08-22 22:09:52,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:52,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385473631] [2020-08-22 22:09:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:52,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:09:52,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385473631] [2020-08-22 22:09:52,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:52,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:52,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362744230] [2020-08-22 22:09:52,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:52,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:52,938 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 22:09:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:53,048 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 22:09:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:53,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:09:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:53,062 INFO L225 Difference]: With dead ends: 51 [2020-08-22 22:09:53,062 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 22:09:53,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:09:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 22:09:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 22:09:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 22:09:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-22 22:09:53,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-08-22 22:09:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:53,121 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-22 22:09:53,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-22 22:09:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 22:09:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:53,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:09:53,125 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-08-22 22:09:53,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758627336] [2020-08-22 22:09:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:09:53,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758627336] [2020-08-22 22:09:53,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:53,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 22:09:53,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078753542] [2020-08-22 22:09:53,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:09:53,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:09:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:09:53,352 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-22 22:09:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:53,481 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-08-22 22:09:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:09:53,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 22:09:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:53,484 INFO L225 Difference]: With dead ends: 66 [2020-08-22 22:09:53,484 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 22:09:53,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 22:09:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 22:09:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 22:09:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 22:09:53,501 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-08-22 22:09:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:53,502 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 22:09:53,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:09:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 22:09:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:53,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:53,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:53,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:09:53,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-08-22 22:09:53,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:53,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143568027] [2020-08-22 22:09:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:53,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143568027] [2020-08-22 22:09:53,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:53,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:53,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980693447] [2020-08-22 22:09:53,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:53,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:53,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:53,757 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 22:09:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:53,820 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 22:09:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:53,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 22:09:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:53,823 INFO L225 Difference]: With dead ends: 69 [2020-08-22 22:09:53,823 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 22:09:53,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:09:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 22:09:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 22:09:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:09:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 22:09:53,839 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 22:09:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:53,839 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 22:09:53,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 22:09:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:53,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:53,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:53,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:09:53,842 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-08-22 22:09:53,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:53,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934820380] [2020-08-22 22:09:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:53,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934820380] [2020-08-22 22:09:53,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:09:53,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:09:53,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428235151] [2020-08-22 22:09:53,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:09:53,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:09:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:09:53,975 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 22:09:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:54,017 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 22:09:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:09:54,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 22:09:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:54,020 INFO L225 Difference]: With dead ends: 54 [2020-08-22 22:09:54,020 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 22:09:54,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:09:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 22:09:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-08-22 22:09:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:09:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 22:09:54,033 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 22:09:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:54,033 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 22:09:54,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:09:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 22:09:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:09:54,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:54,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:54,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:09:54,036 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-08-22 22:09:54,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:54,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297024994] [2020-08-22 22:09:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:09:54,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297024994] [2020-08-22 22:09:54,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:54,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:09:54,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016690266] [2020-08-22 22:09:54,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:09:54,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:54,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:09:54,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:54,323 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-08-22 22:09:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:54,521 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-22 22:09:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:09:54,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-22 22:09:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:54,524 INFO L225 Difference]: With dead ends: 92 [2020-08-22 22:09:54,524 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 22:09:54,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 22:09:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-08-22 22:09:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:09:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-08-22 22:09:54,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2020-08-22 22:09:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:54,538 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-08-22 22:09:54,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:09:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-08-22 22:09:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 22:09:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:54,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:54,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:09:54,541 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 830258234, now seen corresponding path program 1 times [2020-08-22 22:09:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:54,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555353596] [2020-08-22 22:09:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 22:09:54,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555353596] [2020-08-22 22:09:54,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:54,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:09:54,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992687548] [2020-08-22 22:09:54,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:09:54,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:09:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:54,777 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 11 states. [2020-08-22 22:09:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:55,005 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-08-22 22:09:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:09:55,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-08-22 22:09:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:55,008 INFO L225 Difference]: With dead ends: 99 [2020-08-22 22:09:55,008 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 22:09:55,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 22:09:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-08-22 22:09:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 22:09:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-08-22 22:09:55,022 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 43 [2020-08-22 22:09:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:55,022 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-08-22 22:09:55,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:09:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-08-22 22:09:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:09:55,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:09:55,025 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:09:55,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:09:55,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:09:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:09:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash 444280, now seen corresponding path program 2 times [2020-08-22 22:09:55,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:09:55,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792592984] [2020-08-22 22:09:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:09:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:09:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:09:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:09:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:09:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 22:09:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792592984] [2020-08-22 22:09:55,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:09:55,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:09:55,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42935969] [2020-08-22 22:09:55,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:09:55,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:09:55,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:09:55,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:09:55,267 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 11 states. [2020-08-22 22:09:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:09:55,430 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-08-22 22:09:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:09:55,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-08-22 22:09:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:09:55,431 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:09:55,432 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:09:55,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:09:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:09:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:09:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:09:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:09:55,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-08-22 22:09:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:09:55,435 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:09:55,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:09:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:09:55,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:09:55,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:09:55,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:09:55,913 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,913 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,914 INFO L264 CegarLoopResult]: At program point id2FINAL(lines 14 19) the Hoare annotation is: (or (and (<= 2 |id2_#res|) (<= |id2_#res| 2)) (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|))) [2020-08-22 22:09:55,914 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1))) [2020-08-22 22:09:55,914 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= 3 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0))) [2020-08-22 22:09:55,914 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 22:09:55,914 INFO L264 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (<= 3 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) [2020-08-22 22:09:55,915 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 22:09:55,915 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (or (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0))) [2020-08-22 22:09:55,915 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 22:09:55,915 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (or (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2) (<= 3 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0) (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|) (<= id2_~ret~1 2) (<= 2 id2_~ret~1))) [2020-08-22 22:09:55,916 INFO L264 CegarLoopResult]: At program point id2EXIT(lines 14 19) the Hoare annotation is: (or (and (<= 2 |id2_#res|) (<= |id2_#res| 2)) (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|))) [2020-08-22 22:09:55,916 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-22 22:09:55,916 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,916 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,916 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,916 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:09:55,917 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) the Hoare annotation is: false [2020-08-22 22:09:55,917 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:55,917 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-08-22 22:09:55,917 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:55,917 INFO L264 CegarLoopResult]: At program point L24(lines 24 26) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-08-22 22:09:55,917 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 22:09:55,918 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-08-22 22:09:55,918 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (or (and (<= |main_#t~ret3| 0) (<= 0 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= |main_#t~ret3| 2)) (and (<= |main_#t~ret3| 1) (<= 1 |main_#t~ret3|))) [2020-08-22 22:09:55,918 INFO L271 CegarLoopResult]: At program point L24-2(lines 21 27) the Hoare annotation is: true [2020-08-22 22:09:55,918 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= |main_#t~ret3| 0) (<= main_~result~0 0) (<= 0 |main_#t~ret3|) .cse0) (and (<= 2 |main_#t~ret3|) (<= main_~result~0 2) (<= |main_#t~ret3| 2) .cse0) (and (<= |main_#t~ret3| 1) (<= main_~result~0 1) (<= 1 |main_#t~ret3|) .cse0))) [2020-08-22 22:09:55,918 INFO L264 CegarLoopResult]: At program point idFINAL(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= 2 |id_#res|) (<= |id_#res| 2))) [2020-08-22 22:09:55,919 INFO L264 CegarLoopResult]: At program point idEXIT(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= 2 |id_#res|) (<= |id_#res| 2))) [2020-08-22 22:09:55,919 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-22 22:09:55,919 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 22:09:55,919 INFO L264 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 22:09:55,919 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-22 22:09:55,920 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-08-22 22:09:55,920 INFO L271 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-08-22 22:09:55,920 INFO L264 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (or (and (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1)) (and (<= |id_#t~ret0| 2) (<= 2 |id_#t~ret0|)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0))) [2020-08-22 22:09:55,920 INFO L271 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-08-22 22:09:55,920 INFO L264 CegarLoopResult]: At program point L9-2(line 9) the Hoare annotation is: (or (and (<= |id_#t~ret0| 2) (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= 2 |id_#t~ret0|)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0) (<= id_~ret~0 1) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1) (<= 2 id_~ret~0))) [2020-08-22 22:09:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:09:55 BoogieIcfgContainer [2020-08-22 22:09:55,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:09:55,946 INFO L168 Benchmark]: Toolchain (without parser) took 4298.23 ms. Allocated memory was 137.4 MB in the beginning and 250.6 MB in the end (delta: 113.2 MB). Free memory was 102.2 MB in the beginning and 219.3 MB in the end (delta: -117.1 MB). Peak memory consumption was 123.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,947 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 137.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.69 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,949 INFO L168 Benchmark]: Boogie Preprocessor took 155.28 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,950 INFO L168 Benchmark]: RCFGBuilder took 354.80 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,951 INFO L168 Benchmark]: TraceAbstraction took 3480.09 ms. Allocated memory was 201.3 MB in the beginning and 250.6 MB in the end (delta: 49.3 MB). Free memory was 166.3 MB in the beginning and 219.3 MB in the end (delta: -53.0 MB). Peak memory consumption was 123.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:09:55,955 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 137.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.69 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.28 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.80 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3480.09 ms. Allocated memory was 201.3 MB in the beginning and 250.6 MB in the end (delta: 49.3 MB). Free memory was 166.3 MB in the beginning and 219.3 MB in the end (delta: -53.0 MB). Peak memory consumption was 123.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2: ((2 <= \result && \result <= 2) || (\result <= 0 && 0 <= \result)) || (((\result <= 1 && 1 <= ret) && ret <= 1) && 1 <= \result) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for id Derived contract for procedure id: ((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 277 SDtfs, 39 SDslu, 1533 SDs, 0 SdLazy, 335 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 25 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 49 PreInvPairs, 155 NumberOfFragments, 434 HoareAnnotationTreeSize, 49 FomulaSimplifications, 2528 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 155 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 26643 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 39/51 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...