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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:02,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:02,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:02,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:02,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:02,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:02,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:02,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:02,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:02,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:02,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:02,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:02,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:02,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:02,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:02,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:02,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:02,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:25:02,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:02,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:02,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:02,818 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:02,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:02,819 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:02,819 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:02,819 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:02,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:02,819 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:02,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:02,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:02,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:02,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:02,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:02,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:02,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:02,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:02,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:02,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:02,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:02,822 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:02,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:02,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:02,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:02,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:02,823 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:02,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:02,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:02,824 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:02,854 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:02,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:02,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:02,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:02,876 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:02,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-09-20 13:25:02,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d5ccd24/20e60629629a4161a6fd872fa7ecf8e3/FLAG21463e591 [2019-09-20 13:25:03,451 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:03,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-09-20 13:25:03,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d5ccd24/20e60629629a4161a6fd872fa7ecf8e3/FLAG21463e591 [2019-09-20 13:25:03,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9d5ccd24/20e60629629a4161a6fd872fa7ecf8e3 [2019-09-20 13:25:03,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:03,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:03,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:03,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:03,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:03,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:03" (1/1) ... [2019-09-20 13:25:03,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e0d639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:03, skipping insertion in model container [2019-09-20 13:25:03,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:03" (1/1) ... [2019-09-20 13:25:03,832 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:03,848 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:04,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:04,103 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:04,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:04,143 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:04,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04 WrapperNode [2019-09-20 13:25:04,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:04,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:04,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:04,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:04,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (1/1) ... [2019-09-20 13:25:04,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:04,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:04,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:04,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:04,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (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 [2019-09-20 13:25:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:04,551 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:04,551 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:04,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:04 BoogieIcfgContainer [2019-09-20 13:25:04,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:04,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:04,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:04,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:04,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:03" (1/3) ... [2019-09-20 13:25:04,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9b95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:04, skipping insertion in model container [2019-09-20 13:25:04,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:04" (2/3) ... [2019-09-20 13:25:04,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9b95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:04, skipping insertion in model container [2019-09-20 13:25:04,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:04" (3/3) ... [2019-09-20 13:25:04,561 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-09-20 13:25:04,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:04,588 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:04,627 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:04,664 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:04,665 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:04,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:04,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:04,665 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:04,665 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:04,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:04,666 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-20 13:25:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:25:04,692 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:04,695 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:04,700 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-09-20 13:25:04,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:04,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:04,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:04,791 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:04,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:04,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:04,991 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:04,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:05,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:05,011 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-09-20 13:25:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:05,163 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-09-20 13:25:05,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:05,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-20 13:25:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:05,177 INFO L225 Difference]: With dead ends: 33 [2019-09-20 13:25:05,177 INFO L226 Difference]: Without dead ends: 26 [2019-09-20 13:25:05,179 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:25:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-20 13:25:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-20 13:25:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 13:25:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-20 13:25:05,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-09-20 13:25:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:05,223 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-20 13:25:05,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-20 13:25:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:25:05,225 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:05,225 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:05,226 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-09-20 13:25:05,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:05,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:05,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,229 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:05,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:05,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:25:05,456 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:05,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:25:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:25:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:25:05,459 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-09-20 13:25:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:05,614 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-09-20 13:25:05,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:05,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-09-20 13:25:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:05,616 INFO L225 Difference]: With dead ends: 30 [2019-09-20 13:25:05,616 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:25:05,618 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:25:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:25:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-20 13:25:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 13:25:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-20 13:25:05,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-09-20 13:25:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:05,631 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-20 13:25:05,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:25:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-20 13:25:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-20 13:25:05,632 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:05,633 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:05,633 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-09-20 13:25:05,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:05,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:05,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:05,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:05,735 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 13:25:05,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:05 BoogieIcfgContainer [2019-09-20 13:25:05,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:05,760 INFO L168 Benchmark]: Toolchain (without parser) took 1941.55 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 86.8 MB in the beginning and 96.7 MB in the end (delta: -9.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,760 INFO L168 Benchmark]: CDTParser took 1.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.8 MB in the beginning and 105.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.54 ms. Allocated memory is still 131.6 MB. Free memory was 86.6 MB in the beginning and 77.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,763 INFO L168 Benchmark]: Boogie Preprocessor took 138.50 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 77.1 MB in the beginning and 175.6 MB in the end (delta: -98.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,764 INFO L168 Benchmark]: RCFGBuilder took 269.52 ms. Allocated memory is still 199.2 MB. Free memory was 175.6 MB in the beginning and 163.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,764 INFO L168 Benchmark]: TraceAbstraction took 1202.78 ms. Allocated memory is still 199.2 MB. Free memory was 163.0 MB in the beginning and 96.7 MB in the end (delta: 66.3 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:05,768 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.8 MB in the beginning and 105.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.54 ms. Allocated memory is still 131.6 MB. Free memory was 86.6 MB in the beginning and 77.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.50 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 77.1 MB in the beginning and 175.6 MB in the end (delta: -98.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.52 ms. Allocated memory is still 199.2 MB. Free memory was 175.6 MB in the beginning and 163.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1202.78 ms. Allocated memory is still 199.2 MB. Free memory was 163.0 MB in the beginning and 96.7 MB in the end (delta: 66.3 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i