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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:46:41,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:46:41,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:46:41,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:46:41,992 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 [2019-09-10 01:46:42,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:46:42,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:46:42,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:46:42,024 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:46:42,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:46:42,025 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:46:42,025 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:46:42,025 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:46:42,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:46:42,025 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:46:42,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:46:42,028 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:46:42,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:46:42,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:46:42,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:46:42,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:46:42,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:46:42,030 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:46:42,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:46:42,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:46:42,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:46:42,031 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:46:42,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:46:42,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:46:42,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:46:42,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:46:42,032 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:46:42,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:46:42,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:46:42,033 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:46:42,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:46:42,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:46:42,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:46:42,082 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:46:42,083 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:46:42,083 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-10 01:46:42,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2578f6a7/ca478f4aa4fc413e95a9dc0719d93d30/FLAG0d1558b4e [2019-09-10 01:46:42,550 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:46:42,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-10 01:46:42,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2578f6a7/ca478f4aa4fc413e95a9dc0719d93d30/FLAG0d1558b4e [2019-09-10 01:46:42,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2578f6a7/ca478f4aa4fc413e95a9dc0719d93d30 [2019-09-10 01:46:42,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:46:42,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:46:42,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:42,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:46:42,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:46:42,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:42" (1/1) ... [2019-09-10 01:46:42,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fdff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:42, skipping insertion in model container [2019-09-10 01:46:42,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:42" (1/1) ... [2019-09-10 01:46:42,958 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:46:42,975 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:46:43,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:43,177 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:46:43,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:43,211 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:46:43,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43 WrapperNode [2019-09-10 01:46:43,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:43,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:46:43,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:46:43,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:46:43,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (1/1) ... [2019-09-10 01:46:43,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:46:43,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:46:43,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:46:43,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:46:43,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (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 [2019-09-10 01:46:43,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:46:43,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:46:43,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-09-10 01:46:43,375 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-09-10 01:46:43,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:46:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:46:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-09-10 01:46:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-09-10 01:46:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:46:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:46:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:46:43,532 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:46:43,532 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 01:46:43,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:43 BoogieIcfgContainer [2019-09-10 01:46:43,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:46:43,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:46:43,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:46:43,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:46:43,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:46:42" (1/3) ... [2019-09-10 01:46:43,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c0fab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:43, skipping insertion in model container [2019-09-10 01:46:43,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:43" (2/3) ... [2019-09-10 01:46:43,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c0fab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:43, skipping insertion in model container [2019-09-10 01:46:43,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:43" (3/3) ... [2019-09-10 01:46:43,542 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-09-10 01:46:43,551 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:46:43,559 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:46:43,576 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:46:43,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:46:43,604 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:46:43,604 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:46:43,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:46:43,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:46:43,604 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:46:43,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:46:43,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:46:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-10 01:46:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 01:46:43,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:43,631 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:43,633 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-09-10 01:46:43,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:43,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:43,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:43,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:43,685 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:43,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:46:43,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 01:46:43,833 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:43,837 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:46:43,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:46:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:46:43,868 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-09-10 01:46:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:43,999 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-10 01:46:43,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:46:44,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-10 01:46:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:44,010 INFO L225 Difference]: With dead ends: 26 [2019-09-10 01:46:44,011 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 01:46:44,013 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-10 01:46:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 01:46:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-10 01:46:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-10 01:46:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-10 01:46:44,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-09-10 01:46:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:44,052 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-10 01:46:44,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:46:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-10 01:46:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 01:46:44,055 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:44,055 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:44,056 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-09-10 01:46:44,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:44,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:44,063 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:44,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:46:44,166 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:46:44,167 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-10 01:46:44,169 INFO L207 CegarAbsIntRunner]: [0], [1], [4], [6], [9], [10], [16], [25], [32], [34], [35], [36], [38], [39] [2019-09-10 01:46:44,197 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:46:44,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:46:44,405 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:46:44,409 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 2 different actions 10 times. Widened at 1 different actions 1 times. Performed 73 root evaluator evaluations with a maximum evaluation depth of 7. Performed 73 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-10 01:46:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:44,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:46:44,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:46:44,414 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 [2019-09-10 01:46:44,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:44,429 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:46:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:44,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 01:46:44,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:46:44,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 01:46:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:44,513 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:46:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:46:44,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:46:44,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-09-10 01:46:44,575 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:46:44,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-10 01:46:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-10 01:46:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:46:44,577 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-09-10 01:46:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:44,664 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-10 01:46:44,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 01:46:44,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-09-10 01:46:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:44,666 INFO L225 Difference]: With dead ends: 27 [2019-09-10 01:46:44,666 INFO L226 Difference]: Without dead ends: 27 [2019-09-10 01:46:44,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-10 01:46:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-10 01:46:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-10 01:46:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-10 01:46:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-10 01:46:44,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-09-10 01:46:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:44,674 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-10 01:46:44,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-10 01:46:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-10 01:46:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-10 01:46:44,676 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:44,676 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:44,676 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-09-10 01:46:44,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:44,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:44,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:44,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:44,679 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 01:46:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 01:46:44,723 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-10 01:46:44,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:46:44 BoogieIcfgContainer [2019-09-10 01:46:44,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:46:44,761 INFO L168 Benchmark]: Toolchain (without parser) took 1819.09 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 91.4 MB in the beginning and 97.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,764 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 134.7 MB. Free memory was 109.2 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.96 ms. Allocated memory is still 134.7 MB. Free memory was 91.0 MB in the beginning and 82.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,770 INFO L168 Benchmark]: Boogie Preprocessor took 109.58 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 82.0 MB in the beginning and 177.9 MB in the end (delta: -95.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,771 INFO L168 Benchmark]: RCFGBuilder took 210.94 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 166.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,773 INFO L168 Benchmark]: TraceAbstraction took 1223.15 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 97.6 MB in the end (delta: 69.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:44,784 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 109.2 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.96 ms. Allocated memory is still 134.7 MB. Free memory was 91.0 MB in the beginning and 82.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.58 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 82.0 MB in the beginning and 177.9 MB in the end (delta: -95.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 210.94 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 166.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1223.15 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 97.6 MB in the end (delta: 69.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. UNSAFE Result, 1.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 15 SDslu, 118 SDs, 0 SdLazy, 54 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1624 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...