/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:35:30,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:35:30,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:35:30,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 00:35:30,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:35:30,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:35:30,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:35:30,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:35:30,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:35:30,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:35:30,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:35:30,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:35:30,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:35:30,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:35:30,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:35:30,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:35:30,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:35:30,882 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 [2019-11-07 00:35:30,896 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:35:30,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:35:30,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:35:30,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:35:30,898 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:35:30,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:35:30,898 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:35:30,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:35:30,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:35:30,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:35:30,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:35:30,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:35:30,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:35:30,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:35:30,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:35:30,900 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:35:30,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:35:30,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:35:30,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:35:30,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:35:30,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:35:30,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:30,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:35:30,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:35:30,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:35:30,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:35:30,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:35:30,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:35:30,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:35:31,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:35:31,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:35:31,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:35:31,218 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:35:31,219 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:35:31,220 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-11-07 00:35:31,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29827bd05/77197617332146a4829a0a0868ca2798/FLAG97e78a739 [2019-11-07 00:35:31,746 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:35:31,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-11-07 00:35:31,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29827bd05/77197617332146a4829a0a0868ca2798/FLAG97e78a739 [2019-11-07 00:35:32,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29827bd05/77197617332146a4829a0a0868ca2798 [2019-11-07 00:35:32,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:35:32,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:35:32,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:32,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:35:32,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:35:32,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3be5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32, skipping insertion in model container [2019-11-07 00:35:32,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,155 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:35:32,173 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:35:32,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:32,393 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:35:32,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:32,418 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:35:32,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32 WrapperNode [2019-11-07 00:35:32,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:32,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:35:32,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:35:32,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:35:32,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (1/1) ... [2019-11-07 00:35:32,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:35:32,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:35:32,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:35:32,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:35:32,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (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 [2019-11-07 00:35:32,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:35:32,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:35:32,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:35:32,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:35:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:35:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 00:35:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:35:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:35:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:35:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:35:32,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:35:32,775 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:35:32,776 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:35:32,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:32 BoogieIcfgContainer [2019-11-07 00:35:32,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:35:32,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:35:32,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:35:32,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:35:32,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:35:32" (1/3) ... [2019-11-07 00:35:32,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2011f4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:32, skipping insertion in model container [2019-11-07 00:35:32,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:32" (2/3) ... [2019-11-07 00:35:32,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2011f4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:32, skipping insertion in model container [2019-11-07 00:35:32,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:32" (3/3) ... [2019-11-07 00:35:32,785 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-11-07 00:35:32,798 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:35:32,813 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:35:32,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:35:32,859 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:35:32,860 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:35:32,860 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:35:32,860 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:35:32,860 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:35:32,861 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:35:32,861 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:35:32,861 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:35:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 00:35:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 00:35:32,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:32,891 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:32,893 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-11-07 00:35:32,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:32,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575899848] [2019-11-07 00:35:32,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:33,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575899848] [2019-11-07 00:35:33,181 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:33,181 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:35:33,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083279780] [2019-11-07 00:35:33,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:35:33,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:33,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:35:33,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:35:33,208 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-11-07 00:35:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:33,391 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-07 00:35:33,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:35:33,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-07 00:35:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:33,405 INFO L225 Difference]: With dead ends: 50 [2019-11-07 00:35:33,406 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 00:35:33,415 INFO L630 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 [2019-11-07 00:35:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 00:35:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-07 00:35:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 00:35:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-07 00:35:33,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-11-07 00:35:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:33,470 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-07 00:35:33,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:35:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-07 00:35:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 00:35:33,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:33,472 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:33,472 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-11-07 00:35:33,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:33,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096702648] [2019-11-07 00:35:33,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:33,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096702648] [2019-11-07 00:35:33,713 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:33,713 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 00:35:33,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409941980] [2019-11-07 00:35:33,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:35:33,715 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:33,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:35:33,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:35:33,716 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-11-07 00:35:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:33,840 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-07 00:35:33,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:35:33,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-07 00:35:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:33,844 INFO L225 Difference]: With dead ends: 32 [2019-11-07 00:35:33,844 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 00:35:33,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:35:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 00:35:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-07 00:35:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 00:35:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-07 00:35:33,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-11-07 00:35:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:33,861 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-07 00:35:33,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:35:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-07 00:35:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 00:35:33,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:33,864 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:33,864 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-11-07 00:35:33,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:33,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962920175] [2019-11-07 00:35:33,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:35:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:35:33,953 INFO L172 FreeRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-11-07 00:35:33,953 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-07 00:35:33,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:35:33 BoogieIcfgContainer [2019-11-07 00:35:33,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:35:33,979 INFO L168 Benchmark]: Toolchain (without parser) took 1838.97 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 103.0 MB in the beginning and 100.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,980 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.48 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,982 INFO L168 Benchmark]: Boogie Preprocessor took 104.52 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 179.3 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,983 INFO L168 Benchmark]: RCFGBuilder took 253.22 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 167.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,984 INFO L168 Benchmark]: TraceAbstraction took 1197.11 ms. Allocated memory is still 200.3 MB. Free memory was 166.7 MB in the beginning and 100.0 MB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:33,988 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.48 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.52 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 179.3 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 253.22 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 167.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1197.11 ms. Allocated memory is still 200.3 MB. Free memory was 166.7 MB in the beginning and 100.0 MB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 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