/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:46:46,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:46:46,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:46:46,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:46:46,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:46:46,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:46:46,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:46:46,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:46:46,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:46:46,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:46:46,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:46:46,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-08-22 16:46:46,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:46:46,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:46:46,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:46:46,670 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 [2020-08-22 16:46:46,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:46:46,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:46:46,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:46:46,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:46:46,713 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:46:46,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:46:46,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:46:46,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:46:46,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:46:46,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:46:46,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:46:46,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:46:46,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:46:46,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:46:46,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:46:46,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:46:46,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:46:46,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:46:46,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:46:46,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:46:46,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:46:46,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:46:46,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:46:46,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:46:46,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:46:46,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:46:46,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:46:46,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:46:46,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:46:46,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:46:47,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:46:47,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:46:47,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:46:47,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:46:47,078 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:46:47,079 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-22 16:46:47,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135e8c55c/6419b65df23846d49d9f7b322431cccf/FLAGd992eb8c5 [2020-08-22 16:46:47,700 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:46:47,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-22 16:46:47,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135e8c55c/6419b65df23846d49d9f7b322431cccf/FLAGd992eb8c5 [2020-08-22 16:46:48,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135e8c55c/6419b65df23846d49d9f7b322431cccf [2020-08-22 16:46:48,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:46:48,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:46:48,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:46:48,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:46:48,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:46:48,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a90197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48, skipping insertion in model container [2020-08-22 16:46:48,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:46:48,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:46:48,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:46:48,305 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:46:48,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:46:48,343 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:46:48,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48 WrapperNode [2020-08-22 16:46:48,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:46:48,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:46:48,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:46:48,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:46:48,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (1/1) ... [2020-08-22 16:46:48,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:46:48,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:46:48,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:46:48,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:46:48,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (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 16:46:48,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:46:48,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:46:48,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:46:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:46:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:46:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:46:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:46:48,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:46:48,783 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:46:48,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:48 BoogieIcfgContainer [2020-08-22 16:46:48,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:46:48,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:46:48,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:46:48,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:46:48,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:48" (1/3) ... [2020-08-22 16:46:48,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b85d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:48, skipping insertion in model container [2020-08-22 16:46:48,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:48" (2/3) ... [2020-08-22 16:46:48,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b85d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:48, skipping insertion in model container [2020-08-22 16:46:48,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:48" (3/3) ... [2020-08-22 16:46:48,798 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-08-22 16:46:48,810 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:46:48,819 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:46:48,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:46:48,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:46:48,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:46:48,863 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:46:48,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:46:48,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:46:48,864 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:46:48,864 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:46:48,864 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:46:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-22 16:46:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:48,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:48,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:48,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-22 16:46:48,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:48,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850060156] [2020-08-22 16:46:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,236 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 16:46:49,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850060156] [2020-08-22 16:46:49,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:49,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:46:49,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006720121] [2020-08-22 16:46:49,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:46:49,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:46:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:46:49,293 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-22 16:46:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:49,399 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-22 16:46:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:46:49,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:46:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:49,413 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:46:49,413 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:46:49,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:46:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:46:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-22 16:46:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 16:46:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-22 16:46:49,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-22 16:46:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:49,457 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-22 16:46:49,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:46:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-22 16:46:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:49,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:49,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:49,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:46:49,459 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-22 16:46:49,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:49,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561996765] [2020-08-22 16:46:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,578 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 16:46:49,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561996765] [2020-08-22 16:46:49,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:49,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:46:49,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488354498] [2020-08-22 16:46:49,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:46:49,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:46:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:46:49,584 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-22 16:46:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:49,705 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-22 16:46:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:46:49,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 16:46:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:49,708 INFO L225 Difference]: With dead ends: 23 [2020-08-22 16:46:49,708 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 16:46:49,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:46:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 16:46:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 16:46:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 16:46:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-22 16:46:49,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-22 16:46:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:49,716 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-22 16:46:49,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:46:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-22 16:46:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:46:49,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:49,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:49,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:46:49,718 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-22 16:46:49,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:49,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921066047] [2020-08-22 16:46:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:49,923 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 16:46:49,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921066047] [2020-08-22 16:46:49,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:49,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 16:46:49,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779262127] [2020-08-22 16:46:49,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:46:49,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:46:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:46:49,927 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2020-08-22 16:46:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:50,045 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-08-22 16:46:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:46:50,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-22 16:46:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:50,048 INFO L225 Difference]: With dead ends: 14 [2020-08-22 16:46:50,048 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:46:50,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:46:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:46:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:46:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:46:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:46:50,051 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-08-22 16:46:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:50,051 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:46:50,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:46:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:46:50,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:46:50,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:46:50,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:46:50,112 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:46:50,113 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 16:46:50,113 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:46:50,113 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:46:50,114 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:46:50,114 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:46:50,114 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:46:50,114 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2020-08-22 16:46:50,114 INFO L264 CegarLoopResult]: At program point L21(lines 11 28) the Hoare annotation is: false [2020-08-22 16:46:50,115 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-22 16:46:50,115 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2020-08-22 16:46:50,115 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2020-08-22 16:46:50,115 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-08-22 16:46:50,115 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 28) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 16:46:50,116 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-22 16:46:50,116 INFO L268 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-08-22 16:46:50,116 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-22 16:46:50,116 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-08-22 16:46:50,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:50 BoogieIcfgContainer [2020-08-22 16:46:50,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:46:50,133 INFO L168 Benchmark]: Toolchain (without parser) took 2068.33 ms. Allocated memory was 146.3 MB in the beginning and 235.4 MB in the end (delta: 89.1 MB). Free memory was 102.1 MB in the beginning and 202.6 MB in the end (delta: -100.5 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,134 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.85 ms. Allocated memory is still 146.3 MB. Free memory was 101.8 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,136 INFO L168 Benchmark]: Boogie Preprocessor took 152.93 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.5 MB in the beginning and 180.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,137 INFO L168 Benchmark]: RCFGBuilder took 288.92 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 166.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,138 INFO L168 Benchmark]: TraceAbstraction took 1340.62 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.4 MB in the beginning and 202.6 MB in the end (delta: -37.1 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:50,142 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.85 ms. Allocated memory is still 146.3 MB. Free memory was 101.8 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.93 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.5 MB in the beginning and 180.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.92 ms. Allocated memory is still 202.4 MB. Free memory was 180.7 MB in the beginning and 166.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1340.62 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.4 MB in the beginning and 202.6 MB in the end (delta: -37.1 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: 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: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 30 SDslu, 69 SDs, 0 SdLazy, 118 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 16 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...