/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/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:36:06,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:36:06,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:36:06,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:36:06,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:36:06,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:36:06,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:36:06,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:36:06,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:36:06,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:36:06,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:36:06,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:36:06,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:36:06,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:36:06,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:36:06,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:36:06,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:36:06,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:36:06,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:36:06,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:36:06,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:36:06,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:36:06,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:36:06,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:36:06,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:36:06,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:36:06,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:36:06,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:36:06,485 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 00:36:06,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:36:06,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:36:06,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:36:06,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:36:06,512 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:36:06,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:36:06,513 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:36:06,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:36:06,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:36:06,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:36:06,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:36:06,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:36:06,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:36:06,515 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:36:06,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:36:06,515 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:36:06,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:36:06,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:36:06,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:36:06,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:36:06,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:36:06,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:36:06,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:36:06,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:36:06,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:36:06,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:36:06,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:36:06,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:36:06,518 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 00:36:06,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:36:06,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:36:06,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:36:06,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:36:06,811 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:36:06,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2019-11-07 00:36:06,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df90a6f7/1206d8ebdef346729f4a3a8326dec624/FLAGf568b80a0 [2019-11-07 00:36:07,363 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:36:07,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2019-11-07 00:36:07,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df90a6f7/1206d8ebdef346729f4a3a8326dec624/FLAGf568b80a0 [2019-11-07 00:36:07,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df90a6f7/1206d8ebdef346729f4a3a8326dec624 [2019-11-07 00:36:07,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:36:07,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:36:07,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:07,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:36:07,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:36:07,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:07" (1/1) ... [2019-11-07 00:36:07,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e92733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:07, skipping insertion in model container [2019-11-07 00:36:07,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:36:07" (1/1) ... [2019-11-07 00:36:07,801 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:36:07,817 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:36:07,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:07,984 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:36:07,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:36:08,011 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:36:08,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08 WrapperNode [2019-11-07 00:36:08,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:36:08,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:36:08,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:36:08,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:36:08,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (1/1) ... [2019-11-07 00:36:08,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:36:08,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:36:08,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:36:08,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:36:08,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (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 00:36:08,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:36:08,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:36:08,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:36:08,185 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-07 00:36:08,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:36:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:36:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:36:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-07 00:36:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:36:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-07 00:36:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:36:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:36:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:36:08,363 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:36:08,363 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:36:08,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:08 BoogieIcfgContainer [2019-11-07 00:36:08,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:36:08,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:36:08,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:36:08,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:36:08,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:36:07" (1/3) ... [2019-11-07 00:36:08,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2136ba8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:08, skipping insertion in model container [2019-11-07 00:36:08,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:36:08" (2/3) ... [2019-11-07 00:36:08,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2136ba8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:36:08, skipping insertion in model container [2019-11-07 00:36:08,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:36:08" (3/3) ... [2019-11-07 00:36:08,373 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2019-11-07 00:36:08,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:36:08,391 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:36:08,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:36:08,436 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:36:08,437 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:36:08,437 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:36:08,437 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:36:08,437 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:36:08,437 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:36:08,437 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:36:08,438 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:36:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-07 00:36:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 00:36:08,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:08,490 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:08,492 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2019-11-07 00:36:08,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:08,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5284793] [2019-11-07 00:36:08,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:08,629 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 00:36:08,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5284793] [2019-11-07 00:36:08,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:36:08,631 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 00:36:08,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059904177] [2019-11-07 00:36:08,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:36:08,639 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:36:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:36:08,657 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-11-07 00:36:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:08,680 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-07 00:36:08,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:36:08,682 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-07 00:36:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:08,693 INFO L225 Difference]: With dead ends: 35 [2019-11-07 00:36:08,693 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 00:36:08,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:36:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 00:36:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 00:36:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 00:36:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 00:36:08,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2019-11-07 00:36:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:08,743 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 00:36:08,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:36:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 00:36:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 00:36:08,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:08,745 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:08,746 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2019-11-07 00:36:08,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:08,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769800355] [2019-11-07 00:36:08,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:08,844 INFO L172 FreeRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-11-07 00:36:08,844 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-07 00:36:08,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:36:08 BoogieIcfgContainer [2019-11-07 00:36:08,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:36:08,878 INFO L168 Benchmark]: Toolchain (without parser) took 1093.86 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.9 MB in the beginning and 145.9 MB in the end (delta: -44.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,879 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.25 ms. Allocated memory is still 137.4 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,881 INFO L168 Benchmark]: Boogie Preprocessor took 114.04 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,882 INFO L168 Benchmark]: RCFGBuilder took 238.44 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,883 INFO L168 Benchmark]: TraceAbstraction took 509.46 ms. Allocated memory is still 201.9 MB. Free memory was 168.0 MB in the beginning and 145.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:08,887 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.25 ms. Allocated memory is still 137.4 MB. Free memory was 101.6 MB in the beginning and 92.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.04 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 238.44 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 168.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 509.46 ms. Allocated memory is still 201.9 MB. Free memory was 168.0 MB in the beginning and 145.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; VAL [\old(x)=1, x=0] [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L26] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...