/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:55,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:55,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:55,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 16:12:55,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:55,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:55,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:55,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:55,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:55,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:55,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:55,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:55,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:55,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:55,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:55,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:55,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:55,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:55,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:55,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:55,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:12:55,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:55,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:55,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:55,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:55,571 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:55,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:55,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:55,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:55,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:55,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:55,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:55,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:55,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:55,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:55,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:55,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:55,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:55,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:55,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:55,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:55,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:55,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:55,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:55,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:55,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:55,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:55,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:56,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:56,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:56,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:56,019 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:56,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test_while_int.i [2021-01-06 16:12:56,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88ab7d045/2447b75480ba43a5b4a171d548b394db/FLAG3f9477ad4 [2021-01-06 16:12:56,831 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:56,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_while_int.i [2021-01-06 16:12:56,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88ab7d045/2447b75480ba43a5b4a171d548b394db/FLAG3f9477ad4 [2021-01-06 16:12:57,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88ab7d045/2447b75480ba43a5b4a171d548b394db [2021-01-06 16:12:57,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:57,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:57,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:57,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:57,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:57,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3b76c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57, skipping insertion in model container [2021-01-06 16:12:57,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:57,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:12:57,362 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-01-06 16:12:57,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:57,398 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:12:57,414 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-01-06 16:12:57,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:57,436 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:57,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57 WrapperNode [2021-01-06 16:12:57,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:57,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:57,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:57,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:57,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:57,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:57,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:57,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:57,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... [2021-01-06 16:12:57,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:57,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:57,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:57,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:57,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:12:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:57,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:57,905 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:12:57,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:57 BoogieIcfgContainer [2021-01-06 16:12:57,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:57,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:57,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:57,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:57,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:57" (1/3) ... [2021-01-06 16:12:57,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f02515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:57, skipping insertion in model container [2021-01-06 16:12:57,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:57" (2/3) ... [2021-01-06 16:12:57,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f02515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:57, skipping insertion in model container [2021-01-06 16:12:57,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:57" (3/3) ... [2021-01-06 16:12:57,921 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-01-06 16:12:57,930 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:57,936 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:12:57,962 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:12:58,014 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:58,020 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:58,020 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:58,020 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:58,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:58,021 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:58,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:58,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:12:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 16:12:58,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:58,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 16:12:58,094 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2021-01-06 16:12:58,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:58,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011839167] [2021-01-06 16:12:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:58,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011839167] [2021-01-06 16:12:58,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:58,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:12:58,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043773368] [2021-01-06 16:12:58,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:12:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:12:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:58,443 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2021-01-06 16:12:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:58,495 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-01-06 16:12:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:58,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-01-06 16:12:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:58,521 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:12:58,522 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:12:58,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:12:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:12:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:12:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:12:58,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-01-06 16:12:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:58,573 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:12:58,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:12:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:12:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:12:58,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:58,574 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-01-06 16:12:58,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:58,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1810655527, now seen corresponding path program 1 times [2021-01-06 16:12:58,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:58,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116887116] [2021-01-06 16:12:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:58,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116887116] [2021-01-06 16:12:58,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552665618] [2021-01-06 16:12:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:12:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:58,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:58,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-01-06 16:12:58,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791369850] [2021-01-06 16:12:58,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:12:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:12:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:12:58,960 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2021-01-06 16:12:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:59,002 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-01-06 16:12:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:12:59,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2021-01-06 16:12:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:59,004 INFO L225 Difference]: With dead ends: 13 [2021-01-06 16:12:59,004 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:12:59,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:12:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:12:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-01-06 16:12:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:12:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:12:59,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-01-06 16:12:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:59,010 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:12:59,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:12:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:12:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:12:59,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:59,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2021-01-06 16:12:59,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:12:59,226 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash 578140772, now seen corresponding path program 2 times [2021-01-06 16:12:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:59,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297523140] [2021-01-06 16:12:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:59,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:59,271 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:59,291 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:12:59,292 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:12:59,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:12:59,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:59 BoogieIcfgContainer [2021-01-06 16:12:59,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:59,322 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:59,322 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:59,323 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:59,323 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:57" (3/4) ... [2021-01-06 16:12:59,326 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:12:59,373 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test_while_int.i-witness.graphml [2021-01-06 16:12:59,373 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:59,376 INFO L168 Benchmark]: Toolchain (without parser) took 2197.54 ms. Allocated memory is still 162.5 MB. Free memory was 138.3 MB in the beginning and 105.3 MB in the end (delta: 33.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,376 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 137.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:59,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.01 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 129.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.06 ms. Allocated memory is still 162.5 MB. Free memory was 128.8 MB in the beginning and 127.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,378 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 126.5 MB in the end (delta: 936.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,379 INFO L168 Benchmark]: RCFGBuilder took 412.41 ms. Allocated memory is still 162.5 MB. Free memory was 126.5 MB in the beginning and 116.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,380 INFO L168 Benchmark]: TraceAbstraction took 1410.83 ms. Allocated memory is still 162.5 MB. Free memory was 115.7 MB in the beginning and 106.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,380 INFO L168 Benchmark]: Witness Printer took 51.11 ms. Allocated memory is still 162.5 MB. Free memory was 106.8 MB in the beginning and 105.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:59,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 137.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.01 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 129.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.06 ms. Allocated memory is still 162.5 MB. Free memory was 128.8 MB in the beginning and 127.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 126.5 MB in the end (delta: 936.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.41 ms. Allocated memory is still 162.5 MB. Free memory was 126.5 MB in the beginning and 116.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1410.83 ms. Allocated memory is still 162.5 MB. Free memory was 115.7 MB in the beginning and 106.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Witness Printer took 51.11 ms. Allocated memory is still 162.5 MB. Free memory was 106.8 MB in the beginning and 105.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i=0; [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 8 SDslu, 23 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 234 SizeOfPredicates, 4 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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 incorrect! Received shutdown request...