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-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:37:12,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:37:12,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:37:12,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:37:12,572 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 [2019-09-03 20:37:12,597 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:37:12,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:37:12,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:37:12,598 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:37:12,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:37:12,599 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:37:12,600 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:37:12,600 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:37:12,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:37:12,600 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:37:12,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:37:12,603 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:37:12,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:37:12,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:37:12,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:37:12,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:37:12,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:37:12,605 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:37:12,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:37:12,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:37:12,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:37:12,606 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:37:12,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:37:12,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:37:12,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:37:12,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:37:12,607 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:37:12,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:37:12,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:37:12,607 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:37:12,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:37:12,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:37:12,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:37:12,682 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:37:12,683 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:37:12,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-03 20:37:12,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beee8d3d7/4e8792167ea440639e319f99e13b1edc/FLAG1cd8a5af6 [2019-09-03 20:37:13,165 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:37:13,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-03 20:37:13,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beee8d3d7/4e8792167ea440639e319f99e13b1edc/FLAG1cd8a5af6 [2019-09-03 20:37:13,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beee8d3d7/4e8792167ea440639e319f99e13b1edc [2019-09-03 20:37:13,598 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:37:13,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:37:13,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:13,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:37:13,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:37:13,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5748c03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13, skipping insertion in model container [2019-09-03 20:37:13,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:37:13,637 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:37:13,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:13,834 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:37:13,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:13,859 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:37:13,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13 WrapperNode [2019-09-03 20:37:13,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:13,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:37:13,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:37:13,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:37:13,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (1/1) ... [2019-09-03 20:37:13,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:37:13,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:37:13,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:37:13,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:37:13,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (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 [2019-09-03 20:37:14,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:37:14,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:37:14,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:37:14,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:37:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:37:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:37:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:37:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:37:14,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:37:14,192 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:37:14,193 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:37:14,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:14 BoogieIcfgContainer [2019-09-03 20:37:14,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:37:14,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:37:14,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:37:14,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:37:14,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:37:13" (1/3) ... [2019-09-03 20:37:14,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb79bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:14, skipping insertion in model container [2019-09-03 20:37:14,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:13" (2/3) ... [2019-09-03 20:37:14,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb79bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:14, skipping insertion in model container [2019-09-03 20:37:14,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:14" (3/3) ... [2019-09-03 20:37:14,203 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2019-09-03 20:37:14,211 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:37:14,217 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:37:14,234 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:37:14,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:37:14,262 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:37:14,262 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:37:14,262 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:37:14,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:37:14,263 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:37:14,263 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:37:14,263 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:37:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-03 20:37:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:37:14,283 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:14,284 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:14,287 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-03 20:37:14,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:14,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:14,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:14,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:14,335 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:14,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:37:14,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:37:14,516 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:14,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:37:14,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:37:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:37:14,550 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-09-03 20:37:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:14,579 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-03 20:37:14,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:37:14,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 20:37:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:14,601 INFO L225 Difference]: With dead ends: 18 [2019-09-03 20:37:14,602 INFO L226 Difference]: Without dead ends: 12 [2019-09-03 20:37:14,603 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:37:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-03 20:37:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-03 20:37:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-03 20:37:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-03 20:37:14,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-03 20:37:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:14,637 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-03 20:37:14,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:37:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-03 20:37:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:37:14,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:14,638 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:14,638 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-03 20:37:14,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:14,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:14,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:14,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:14,641 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:14,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:37:14,760 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:37:14,762 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-03 20:37:14,764 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2019-09-03 20:37:14,793 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:37:14,793 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:37:14,852 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-03 20:37:14,909 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:37:14,912 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-09-03 20:37:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:14,917 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:37:14,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:37:14,917 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 [2019-09-03 20:37:14,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:14,937 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:37:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:14,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:37:14,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:37:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:15,022 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:37:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:15,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:37:15,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-03 20:37:15,076 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:37:15,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:37:15,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:37:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:37:15,078 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-03 20:37:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:15,100 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-03 20:37:15,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:37:15,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-03 20:37:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:15,103 INFO L225 Difference]: With dead ends: 13 [2019-09-03 20:37:15,103 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:37:15,105 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:37:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:37:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:37:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:37:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 20:37:15,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 20:37:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:15,111 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 20:37:15,112 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:37:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 20:37:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:37:15,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:15,113 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:15,114 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-03 20:37:15,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:15,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:15,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:15,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:15,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:37:15,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:37:15,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:37:15,241 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:15,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:37:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:37:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:37:15,242 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-09-03 20:37:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:15,263 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-09-03 20:37:15,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:37:15,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 20:37:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:15,264 INFO L225 Difference]: With dead ends: 11 [2019-09-03 20:37:15,264 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:37:15,265 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 [2019-09-03 20:37:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:37:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:37:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:37:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:37:15,266 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-09-03 20:37:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:15,266 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:37:15,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:37:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:37:15,267 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:37:15,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:37:15 BoogieIcfgContainer [2019-09-03 20:37:15,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:37:15,276 INFO L168 Benchmark]: Toolchain (without parser) took 1674.54 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 86.2 MB in the beginning and 109.4 MB in the end (delta: -23.2 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,277 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 104.4 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.17 ms. Allocated memory is still 138.4 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,279 INFO L168 Benchmark]: Boogie Preprocessor took 128.06 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 76.9 MB in the beginning and 177.0 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,280 INFO L168 Benchmark]: RCFGBuilder took 205.44 ms. Allocated memory is still 199.2 MB. Free memory was 177.0 MB in the beginning and 165.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,281 INFO L168 Benchmark]: TraceAbstraction took 1077.77 ms. Allocated memory is still 199.2 MB. Free memory was 165.2 MB in the beginning and 109.4 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:15,285 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 138.4 MB. Free memory was 104.4 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.17 ms. Allocated memory is still 138.4 MB. Free memory was 86.0 MB in the beginning and 76.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.06 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 76.9 MB in the beginning and 177.0 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 205.44 ms. Allocated memory is still 199.2 MB. Free memory was 177.0 MB in the beginning and 165.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1077.77 ms. Allocated memory is still 199.2 MB. Free memory was 165.2 MB in the beginning and 109.4 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 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, 17 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 1 SDslu, 52 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1222 SizeOfPredicates, 1 NumberOfNonLiveVariables, 29 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...