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-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:00:59,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:00:59,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:00:59,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:00:59,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:00:59,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:00:59,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:00:59,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:00:59,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:00:59,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:00:59,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:00:59,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 13:00:59,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 13:00:59,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 13:00:59,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 13:00:59,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 13:00:59,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 13:00:59,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 13:00:59,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 13:00:59,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 13:00:59,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 13:00:59,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 13:00:59,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 13:00:59,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 13:00:59,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 13:00:59,983 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 [2019-09-05 13:00:59,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:00:59,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:00:59,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:00:59,998 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:00:59,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:00:59,999 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:00:59,999 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:01:00,000 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:01:00,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:01:00,000 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:01:00,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:01:00,001 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:01:00,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:01:00,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:01:00,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:01:00,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:01:00,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:01:00,002 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:01:00,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:01:00,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:01:00,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:01:00,005 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:01:00,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:01:00,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:01:00,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:01:00,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:01:00,005 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:01:00,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:01:00,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:01:00,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:01:00,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:01:00,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:01:00,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:01:00,054 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:01:00,055 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:01:00,055 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2019-09-05 13:01:00,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc17b8d4/9d2d688507254302bcd7ffd7da255183/FLAG89cb9e59f [2019-09-05 13:01:00,542 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:01:00,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2019-09-05 13:01:00,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc17b8d4/9d2d688507254302bcd7ffd7da255183/FLAG89cb9e59f [2019-09-05 13:01:00,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc17b8d4/9d2d688507254302bcd7ffd7da255183 [2019-09-05 13:01:00,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:01:00,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:01:00,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:01:00,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:01:00,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:01:00,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:01:00" (1/1) ... [2019-09-05 13:01:00,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e08cfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:00, skipping insertion in model container [2019-09-05 13:01:00,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:01:00" (1/1) ... [2019-09-05 13:01:00,941 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:01:00,960 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:01:01,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:01:01,177 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:01:01,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:01:01,205 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:01:01,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01 WrapperNode [2019-09-05 13:01:01,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:01:01,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:01:01,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:01:01,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:01:01,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (1/1) ... [2019-09-05 13:01:01,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:01:01,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:01:01,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:01:01,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:01:01,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (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 [2019-09-05 13:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:01:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:01:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:01:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:01:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:01:01,558 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:01:01,558 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:01:01,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:01:01 BoogieIcfgContainer [2019-09-05 13:01:01,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:01:01,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:01:01,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:01:01,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:01:01,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:01:00" (1/3) ... [2019-09-05 13:01:01,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4531e423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:01:01, skipping insertion in model container [2019-09-05 13:01:01,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:01" (2/3) ... [2019-09-05 13:01:01,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4531e423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:01:01, skipping insertion in model container [2019-09-05 13:01:01,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:01:01" (3/3) ... [2019-09-05 13:01:01,583 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2019-09-05 13:01:01,616 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:01:01,634 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:01:01,672 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:01:01,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:01:01,704 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:01:01,704 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:01:01,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:01:01,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:01:01,704 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:01:01,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:01:01,705 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:01:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-05 13:01:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 13:01:01,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:01,727 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:01,730 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:01,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1158151592, now seen corresponding path program 1 times [2019-09-05 13:01:01,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:01,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:01,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:01,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:01,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:01:01,924 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:01:01,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 13:01:01,925 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:01:01,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:01:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:01:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 13:01:01,945 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-09-05 13:01:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:02,048 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-05 13:01:02,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:01:02,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-05 13:01:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:02,058 INFO L225 Difference]: With dead ends: 29 [2019-09-05 13:01:02,058 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 13:01:02,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 13:01:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 13:01:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-05 13:01:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 13:01:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-05 13:01:02,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2019-09-05 13:01:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:02,098 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-05 13:01:02,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:01:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-05 13:01:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 13:01:02,099 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:02,099 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:02,099 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1937413030, now seen corresponding path program 1 times [2019-09-05 13:01:02,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:02,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:02,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:02,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:02,102 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:01:02,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:01:02,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-05 13:01:02,179 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:01:02,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 13:01:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 13:01:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 13:01:02,182 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2019-09-05 13:01:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:02,276 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-05 13:01:02,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 13:01:02,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-09-05 13:01:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:02,279 INFO L225 Difference]: With dead ends: 29 [2019-09-05 13:01:02,280 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 13:01:02,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:01:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 13:01:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-05 13:01:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 13:01:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-09-05 13:01:02,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2019-09-05 13:01:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:02,292 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-09-05 13:01:02,292 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 13:01:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-09-05 13:01:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-05 13:01:02,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:02,294 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:02,295 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash 441803270, now seen corresponding path program 1 times [2019-09-05 13:01:02,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:02,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:02,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:02,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:02,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-05 13:01:02,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:02,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:01:02,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2019-09-05 13:01:02,405 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [11], [19], [23], [29], [32], [34], [37], [39], [40], [41], [42], [44], [45], [46], [47] [2019-09-05 13:01:02,449 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:01:02,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:01:02,663 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:01:02,665 INFO L272 AbstractInterpreter]: Visited 18 different actions 103 times. Merged at 4 different actions 20 times. Widened at 1 different actions 1 times. Performed 120 root evaluator evaluations with a maximum evaluation depth of 7. Performed 120 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:01:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:02,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:01:02,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:02,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:01:02,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:02,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:01:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:02,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-05 13:01:02,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:01:02,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:01:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 13:01:02,887 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:01:02,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:01:03,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:01:03,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:01:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 13:01:03,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:01:03,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 16 [2019-09-05 13:01:03,052 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:01:03,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:01:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:01:03,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2019-09-05 13:01:03,055 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2019-09-05 13:01:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:03,243 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-09-05 13:01:03,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 13:01:03,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-09-05 13:01:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:03,244 INFO L225 Difference]: With dead ends: 35 [2019-09-05 13:01:03,244 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:01:03,245 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2019-09-05 13:01:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:01:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:01:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:01:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:01:03,246 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-09-05 13:01:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:03,246 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:01:03,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:01:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:01:03,247 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:01:03,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:01:03 BoogieIcfgContainer [2019-09-05 13:01:03,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:01:03,255 INFO L168 Benchmark]: Toolchain (without parser) took 2330.66 ms. Allocated memory was 134.7 MB in the beginning and 229.1 MB in the end (delta: 94.4 MB). Free memory was 89.2 MB in the beginning and 161.7 MB in the end (delta: -72.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,256 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory was 107.7 MB in the beginning and 107.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.85 ms. Allocated memory is still 134.7 MB. Free memory was 88.8 MB in the beginning and 79.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,258 INFO L168 Benchmark]: Boogie Preprocessor took 122.78 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 79.7 MB in the beginning and 177.5 MB in the end (delta: -97.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,259 INFO L168 Benchmark]: RCFGBuilder took 230.27 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 165.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,260 INFO L168 Benchmark]: TraceAbstraction took 1684.41 ms. Allocated memory was 200.8 MB in the beginning and 229.1 MB in the end (delta: 28.3 MB). Free memory was 165.2 MB in the beginning and 161.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:03,264 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory was 107.7 MB in the beginning and 107.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.85 ms. Allocated memory is still 134.7 MB. Free memory was 88.8 MB in the beginning and 79.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.78 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 79.7 MB in the beginning and 177.5 MB in the end (delta: -97.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 230.27 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 165.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1684.41 ms. Allocated memory was 200.8 MB in the beginning and 229.1 MB in the end (delta: 28.3 MB). Free memory was 165.2 MB in the beginning and 161.7 MB in the end (delta: 3.5 MB). Peak memory consumption was 31.8 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, 22 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 3 OverallIterations, 4 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 31 SDslu, 162 SDs, 0 SdLazy, 131 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 6659 SizeOfPredicates, 5 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 43/65 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...