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/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:11,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:11,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:11,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:11,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:11,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:11,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:11,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:11,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:11,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:11,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:11,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:11,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:11,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:11,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:11,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:11,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:11,967 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 13:26:11,981 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:11,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:11,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:11,982 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:11,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:11,983 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:11,983 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:11,983 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:11,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:11,984 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:11,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:11,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:11,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:11,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:11,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:11,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:11,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:11,986 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:11,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:11,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:11,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:11,987 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:11,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:11,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:11,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:11,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:11,988 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:11,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:11,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:11,988 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:12,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:12,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:12,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:12,035 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:12,036 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:12,036 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2019-09-20 13:26:12,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8516cea8/95f1ecde328046d2a67e01d4a6f44216/FLAG1ab9b0e57 [2019-09-20 13:26:12,531 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:12,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2019-09-20 13:26:12,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8516cea8/95f1ecde328046d2a67e01d4a6f44216/FLAG1ab9b0e57 [2019-09-20 13:26:12,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8516cea8/95f1ecde328046d2a67e01d4a6f44216 [2019-09-20 13:26:12,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:12,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:12,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:12,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:12,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:12,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:12" (1/1) ... [2019-09-20 13:26:12,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e46397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:12, skipping insertion in model container [2019-09-20 13:26:12,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:12" (1/1) ... [2019-09-20 13:26:12,984 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:13,001 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:13,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:13,155 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:13,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:13,180 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:13,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13 WrapperNode [2019-09-20 13:26:13,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:13,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:13,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:13,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:13,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (1/1) ... [2019-09-20 13:26:13,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:13,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:13,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:13,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:13,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (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 13:26:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 13:26:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:13,533 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:13,533 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:26:13,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:13 BoogieIcfgContainer [2019-09-20 13:26:13,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:13,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:13,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:13,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:13,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:12" (1/3) ... [2019-09-20 13:26:13,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@839d199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:13, skipping insertion in model container [2019-09-20 13:26:13,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:13" (2/3) ... [2019-09-20 13:26:13,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@839d199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:13, skipping insertion in model container [2019-09-20 13:26:13,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:13" (3/3) ... [2019-09-20 13:26:13,542 INFO L109 eAbstractionObserver]: Analyzing ICFG eq1.c [2019-09-20 13:26:13,553 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:13,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:13,578 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:13,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:13,603 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:13,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:13,603 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:13,603 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:13,604 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:13,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:13,604 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 13:26:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:26:13,625 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:13,626 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:13,628 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2019-09-20 13:26:13,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:13,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:13,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:13,732 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 13:26:13,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:13,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:13,734 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:13,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:13,753 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-20 13:26:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:13,768 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-09-20 13:26:13,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:13,769 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 13:26:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:13,779 INFO L225 Difference]: With dead ends: 19 [2019-09-20 13:26:13,780 INFO L226 Difference]: Without dead ends: 12 [2019-09-20 13:26:13,782 INFO L636 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 [2019-09-20 13:26:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-20 13:26:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-20 13:26:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-20 13:26:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-09-20 13:26:13,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-09-20 13:26:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:13,820 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-09-20 13:26:13,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-09-20 13:26:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:26:13,822 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:13,822 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:13,822 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-09-20 13:26:13,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:13,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:13,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,826 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:14,092 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 13:26:14,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:14,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:14,093 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:14,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:14,097 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2019-09-20 13:26:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:14,197 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-09-20 13:26:14,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:14,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 13:26:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:14,198 INFO L225 Difference]: With dead ends: 10 [2019-09-20 13:26:14,198 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:14,200 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:26:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:14,202 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-09-20 13:26:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:14,202 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:14,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:14,203 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:14,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:14 BoogieIcfgContainer [2019-09-20 13:26:14,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:14,215 INFO L168 Benchmark]: Toolchain (without parser) took 1244.30 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 91.0 MB in the beginning and 136.4 MB in the end (delta: -45.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,216 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 134.7 MB. Free memory was 109.1 MB in the beginning and 108.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.03 ms. Allocated memory is still 134.7 MB. Free memory was 90.8 MB in the beginning and 81.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,221 INFO L168 Benchmark]: Boogie Preprocessor took 123.18 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 81.4 MB in the beginning and 177.4 MB in the end (delta: -96.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,222 INFO L168 Benchmark]: RCFGBuilder took 230.09 ms. Allocated memory is still 200.8 MB. Free memory was 177.4 MB in the beginning and 166.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,224 INFO L168 Benchmark]: TraceAbstraction took 674.18 ms. Allocated memory is still 200.8 MB. Free memory was 165.5 MB in the beginning and 136.4 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:14,235 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 134.7 MB. Free memory was 109.1 MB in the beginning and 108.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 212.03 ms. Allocated memory is still 134.7 MB. Free memory was 90.8 MB in the beginning and 81.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.18 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 81.4 MB in the beginning and 177.4 MB in the end (delta: -96.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 230.09 ms. Allocated memory is still 200.8 MB. Free memory was 177.4 MB in the beginning and 166.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 674.18 ms. Allocated memory is still 200.8 MB. Free memory was 165.5 MB in the beginning and 136.4 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 0.6s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 8 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...