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-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:09:21,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:09:21,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:09:21,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:09:21,261 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 02:09:21,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:09:21,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:09:21,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:09:21,276 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:09:21,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:09:21,277 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:09:21,277 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:09:21,278 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:09:21,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:09:21,278 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:09:21,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:09:21,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:09:21,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:09:21,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:09:21,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:09:21,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:09:21,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:09:21,280 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:09:21,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:09:21,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:09:21,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:09:21,281 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:09:21,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:09:21,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:09:21,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:09:21,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:09:21,282 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:09:21,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:09:21,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:09:21,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:09:21,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:09:21,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:09:21,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:09:21,327 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:09:21,327 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:09:21,328 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-10 02:09:21,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a0ca731/d0cdb764075a4dea9126c8c0eedbe514/FLAGe129d5f19 [2019-09-10 02:09:21,823 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:09:21,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-10 02:09:21,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a0ca731/d0cdb764075a4dea9126c8c0eedbe514/FLAGe129d5f19 [2019-09-10 02:09:22,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43a0ca731/d0cdb764075a4dea9126c8c0eedbe514 [2019-09-10 02:09:22,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:09:22,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:09:22,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:09:22,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:09:22,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:09:22,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd782ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22, skipping insertion in model container [2019-09-10 02:09:22,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,240 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:09:22,257 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:09:22,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:09:22,443 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:09:22,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:09:22,468 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:09:22,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22 WrapperNode [2019-09-10 02:09:22,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:09:22,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:09:22,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:09:22,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:09:22,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (1/1) ... [2019-09-10 02:09:22,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:09:22,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:09:22,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:09:22,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:09:22,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (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 02:09:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:09:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:09:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:09:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:09:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:09:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:09:22,818 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:09:22,818 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 02:09:22,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:09:22 BoogieIcfgContainer [2019-09-10 02:09:22,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:09:22,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:09:22,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:09:22,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:09:22,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:09:22" (1/3) ... [2019-09-10 02:09:22,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bedfb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:09:22, skipping insertion in model container [2019-09-10 02:09:22,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:09:22" (2/3) ... [2019-09-10 02:09:22,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bedfb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:09:22, skipping insertion in model container [2019-09-10 02:09:22,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:09:22" (3/3) ... [2019-09-10 02:09:22,827 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2019-09-10 02:09:22,836 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:09:22,843 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:09:22,859 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:09:22,886 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:09:22,887 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:09:22,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:09:22,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:09:22,887 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:09:22,887 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:09:22,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:09:22,888 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:09:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-10 02:09:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:09:22,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:22,914 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:22,915 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1875203651, now seen corresponding path program 1 times [2019-09-10 02:09:22,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:22,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:22,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:22,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:22,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:23,145 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 02:09:23,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:09:23,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:09:23,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:09:23,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:09:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:09:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:09:23,206 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-09-10 02:09:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:23,379 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-09-10 02:09:23,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:09:23,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 02:09:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:23,392 INFO L225 Difference]: With dead ends: 26 [2019-09-10 02:09:23,392 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 02:09:23,396 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 [2019-09-10 02:09:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 02:09:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-10 02:09:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-10 02:09:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-10 02:09:23,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-09-10 02:09:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:23,441 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-10 02:09:23,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:09:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-10 02:09:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 02:09:23,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:23,444 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:23,445 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1632080392, now seen corresponding path program 1 times [2019-09-10 02:09:23,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:23,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:23,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:23,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:23,450 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:23,568 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 02:09:23,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:23,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:23,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-10 02:09:23,573 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [15], [21], [24], [26], [29], [31], [32], [33], [34], [36], [37] [2019-09-10 02:09:23,602 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:09:23,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:09:23,770 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:09:23,773 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 3 different actions 15 times. Widened at 1 different actions 1 times. Performed 75 root evaluator evaluations with a maximum evaluation depth of 5. Performed 75 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-10 02:09:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:23,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:09:23,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:23,779 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 02:09:23,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:23,798 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:09:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:23,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-10 02:09:23,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:23,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:23,876 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 02:09:23,877 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:23,935 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 02:09:23,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:23,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-09-10 02:09:23,941 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:23,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 02:09:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 02:09:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:09:23,943 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2019-09-10 02:09:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:24,008 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-10 02:09:24,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 02:09:24,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-10 02:09:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:24,010 INFO L225 Difference]: With dead ends: 28 [2019-09-10 02:09:24,010 INFO L226 Difference]: Without dead ends: 28 [2019-09-10 02:09:24,011 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:09:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-10 02:09:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-10 02:09:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-10 02:09:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-10 02:09:24,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2019-09-10 02:09:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:24,018 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-10 02:09:24,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 02:09:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-10 02:09:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-10 02:09:24,019 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:24,019 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:24,020 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 282820957, now seen corresponding path program 2 times [2019-09-10 02:09:24,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:24,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,022 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:09:24,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:24,107 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:09:24,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:09:24,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,108 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:09:24,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:09:24,126 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:24,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 02:09:24,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:09:24,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 02:09:24,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:24,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:09:24,185 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:09:24,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:24,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2019-09-10 02:09:24,258 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:24,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-10 02:09:24,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-10 02:09:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-10 02:09:24,260 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2019-09-10 02:09:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:24,360 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-10 02:09:24,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 02:09:24,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-10 02:09:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:24,363 INFO L225 Difference]: With dead ends: 35 [2019-09-10 02:09:24,363 INFO L226 Difference]: Without dead ends: 35 [2019-09-10 02:09:24,364 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:09:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-10 02:09:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-10 02:09:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-10 02:09:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-10 02:09:24,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2019-09-10 02:09:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:24,376 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-10 02:09:24,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-10 02:09:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-10 02:09:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-10 02:09:24,377 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:24,377 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:24,378 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash 864272984, now seen corresponding path program 3 times [2019-09-10 02:09:24,379 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:24,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:09:24,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,381 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-10 02:09:24,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:24,502 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:09:24,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:09:24,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,504 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:24,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 02:09:24,522 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 02:09:24,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 02:09:24,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:09:24,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 02:09:24,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:24,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-10 02:09:24,601 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-10 02:09:24,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:24,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2019-09-10 02:09:24,682 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:24,683 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 02:09:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 02:09:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-10 02:09:24,683 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2019-09-10 02:09:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:24,762 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-10 02:09:24,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:09:24,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-10 02:09:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:24,764 INFO L225 Difference]: With dead ends: 42 [2019-09-10 02:09:24,764 INFO L226 Difference]: Without dead ends: 42 [2019-09-10 02:09:24,764 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-09-10 02:09:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-10 02:09:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-10 02:09:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-10 02:09:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-10 02:09:24,771 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2019-09-10 02:09:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:24,772 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-10 02:09:24,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 02:09:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-10 02:09:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-10 02:09:24,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:24,774 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:24,774 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1759150333, now seen corresponding path program 4 times [2019-09-10 02:09:24,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:24,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:09:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:24,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-10 02:09:24,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:24,879 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:09:24,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:09:24,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:24,879 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:09:24,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:24,907 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:24,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:09:24,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:24,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-10 02:09:24,967 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-10 02:09:25,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:25,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2019-09-10 02:09:25,081 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:25,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-10 02:09:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-10 02:09:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-09-10 02:09:25,082 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 11 states. [2019-09-10 02:09:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:25,256 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-10 02:09:25,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-10 02:09:25,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-09-10 02:09:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:25,257 INFO L225 Difference]: With dead ends: 49 [2019-09-10 02:09:25,257 INFO L226 Difference]: Without dead ends: 49 [2019-09-10 02:09:25,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-09-10 02:09:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-10 02:09:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-10 02:09:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-10 02:09:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-10 02:09:25,264 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2019-09-10 02:09:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:25,265 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-10 02:09:25,265 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-10 02:09:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-10 02:09:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-10 02:09:25,266 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:25,266 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:25,267 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:25,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001672, now seen corresponding path program 5 times [2019-09-10 02:09:25,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:25,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:25,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:09:25,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:25,269 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-10 02:09:25,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:25,357 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:25,357 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:09:25,357 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:09:25,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:25,358 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:25,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:09:25,372 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:09:25,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 02:09:25,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:09:25,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-10 02:09:25,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:25,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-10 02:09:25,496 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:25,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:25,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-10 02:09:25,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:25,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 17 [2019-09-10 02:09:25,602 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:25,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-10 02:09:25,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-10 02:09:25,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-09-10 02:09:25,603 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 16 states. [2019-09-10 02:09:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:25,737 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-09-10 02:09:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-10 02:09:25,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2019-09-10 02:09:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:25,738 INFO L225 Difference]: With dead ends: 51 [2019-09-10 02:09:25,738 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:09:25,739 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-09-10 02:09:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:09:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:09:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:09:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:09:25,741 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-09-10 02:09:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:25,741 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:09:25,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-10 02:09:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:09:25,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:09:25,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:09:25 BoogieIcfgContainer [2019-09-10 02:09:25,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:09:25,752 INFO L168 Benchmark]: Toolchain (without parser) took 3526.40 ms. Allocated memory was 134.2 MB in the beginning and 254.8 MB in the end (delta: 120.6 MB). Free memory was 90.4 MB in the beginning and 190.1 MB in the end (delta: -99.7 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,754 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 108.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.16 ms. Allocated memory is still 134.2 MB. Free memory was 90.2 MB in the beginning and 81.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,757 INFO L168 Benchmark]: Boogie Preprocessor took 128.40 ms. Allocated memory was 134.2 MB in the beginning and 201.3 MB in the end (delta: 67.1 MB). Free memory was 81.3 MB in the beginning and 178.3 MB in the end (delta: -97.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,758 INFO L168 Benchmark]: RCFGBuilder took 221.95 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 167.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,765 INFO L168 Benchmark]: TraceAbstraction took 2926.57 ms. Allocated memory was 201.3 MB in the beginning and 254.8 MB in the end (delta: 53.5 MB). Free memory was 166.9 MB in the beginning and 190.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:25,772 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 134.2 MB. Free memory was 108.7 MB in the beginning and 108.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.16 ms. Allocated memory is still 134.2 MB. Free memory was 90.2 MB in the beginning and 81.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.40 ms. Allocated memory was 134.2 MB in the beginning and 201.3 MB in the end (delta: 67.1 MB). Free memory was 81.3 MB in the beginning and 178.3 MB in the end (delta: -97.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 221.95 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 167.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2926.57 ms. Allocated memory was 201.3 MB in the beginning and 254.8 MB in the end (delta: 53.5 MB). Free memory was 166.9 MB in the beginning and 190.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 63 SDslu, 272 SDs, 0 SdLazy, 286 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 320 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 27865 SizeOfPredicates, 11 NumberOfNonLiveVariables, 254 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 406/600 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...