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/eca-rers2012/Problem10_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:19:33,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:19:33,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:19:33,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:19:33,873 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 [2019-10-02 19:19:33,894 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:19:33,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:19:33,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:19:33,896 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:19:33,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:19:33,897 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:19:33,897 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:19:33,897 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:19:33,897 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:19:33,897 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:19:33,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:19:33,899 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:19:33,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:19:33,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:19:33,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:19:33,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:19:33,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:19:33,901 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:19:33,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:19:33,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:19:33,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:19:33,902 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:19:33,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:19:33,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:19:33,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:19:33,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:19:33,903 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:19:33,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:19:33,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:19:33,903 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:19:33,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:19:33,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:19:33,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:19:33,966 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:19:33,966 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:19:33,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-02 19:19:34,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a231ff6f0/bca059b7aec14253b5d289120e054057/FLAG6f75b6a7b [2019-10-02 19:19:34,593 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:19:34,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-10-02 19:19:34,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a231ff6f0/bca059b7aec14253b5d289120e054057/FLAG6f75b6a7b [2019-10-02 19:19:34,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a231ff6f0/bca059b7aec14253b5d289120e054057 [2019-10-02 19:19:34,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:19:34,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:19:34,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:19:34,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:19:34,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:19:34,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:19:34" (1/1) ... [2019-10-02 19:19:34,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36edca5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:34, skipping insertion in model container [2019-10-02 19:19:34,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:19:34" (1/1) ... [2019-10-02 19:19:34,865 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:19:34,925 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:19:35,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:19:35,470 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:19:35,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:19:35,630 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:19:35,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35 WrapperNode [2019-10-02 19:19:35,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:19:35,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:19:35,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:19:35,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:19:35,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (1/1) ... [2019-10-02 19:19:35,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:19:35,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:19:35,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:19:35,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:19:35,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (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 [2019-10-02 19:19:35,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:19:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:19:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:19:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:19:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:19:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:19:37,159 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:19:37,159 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:19:37,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:19:37 BoogieIcfgContainer [2019-10-02 19:19:37,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:19:37,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:19:37,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:19:37,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:19:37,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:19:34" (1/3) ... [2019-10-02 19:19:37,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370baf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:19:37, skipping insertion in model container [2019-10-02 19:19:37,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:35" (2/3) ... [2019-10-02 19:19:37,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370baf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:19:37, skipping insertion in model container [2019-10-02 19:19:37,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:19:37" (3/3) ... [2019-10-02 19:19:37,169 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label56.c [2019-10-02 19:19:37,181 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:19:37,191 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:19:37,212 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:19:37,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:19:37,258 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:19:37,258 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:19:37,259 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:19:37,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:19:37,259 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:19:37,260 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:19:37,260 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:19:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:19:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 19:19:37,314 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:19:37,315 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:19:37,318 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:19:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1758937742, now seen corresponding path program 1 times [2019-10-02 19:19:37,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:19:37,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:37,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:19:37,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:37,396 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:19:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:19:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:19:37,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:19:37,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:19:37,669 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:19:37,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:19:37,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:19:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:19:37,694 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 19:19:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:19:38,829 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2019-10-02 19:19:38,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:19:38,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-02 19:19:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:19:38,848 INFO L225 Difference]: With dead ends: 362 [2019-10-02 19:19:38,848 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 19:19:38,850 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:19:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 19:19:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 19:19:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:19:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-02 19:19:38,941 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 29 [2019-10-02 19:19:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:19:38,942 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-02 19:19:38,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:19:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-02 19:19:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-02 19:19:38,948 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:19:38,948 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:19:38,949 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:19:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 30670753, now seen corresponding path program 1 times [2019-10-02 19:19:38,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:19:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:38,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:19:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:38,952 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:19:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:19:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 19:19:39,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:19:39,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:19:39,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 117 with the following transitions: [2019-10-02 19:19:39,263 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:19:39,325 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:19:39,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:19:55,329 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:19:55,332 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 16. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 19:19:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:55,337 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:20:07,366 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 72.91% of their original sizes. [2019-10-02 19:20:07,366 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:20:07,425 INFO L420 sIntCurrentIteration]: We unified 115 AI predicates to 115 [2019-10-02 19:20:07,426 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:20:07,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:20:07,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 19:20:07,427 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:20:07,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 19:20:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 19:20:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:20:07,430 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 7 states. [2019-10-02 19:20:12,058 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:22:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:22:18,808 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2019-10-02 19:22:18,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:22:18,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-02 19:22:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:22:18,812 INFO L225 Difference]: With dead ends: 438 [2019-10-02 19:22:18,812 INFO L226 Difference]: Without dead ends: 438 [2019-10-02 19:22:18,813 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 19:22:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-02 19:22:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2019-10-02 19:22:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 19:22:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 585 transitions. [2019-10-02 19:22:18,841 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 585 transitions. Word has length 116 [2019-10-02 19:22:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:22:18,841 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 585 transitions. [2019-10-02 19:22:18,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 19:22:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 585 transitions. [2019-10-02 19:22:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-02 19:22:18,850 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:22:18,850 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:22:18,851 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:22:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:22:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2102929051, now seen corresponding path program 1 times [2019-10-02 19:22:18,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:22:18,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:18,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:22:18,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:18,854 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:22:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:22:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 19:22:19,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:22:19,041 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:22:19,041 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2019-10-02 19:22:19,042 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:22:19,047 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:22:19,047 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:22:21,839 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:23:02,390 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:23:02,391 INFO L272 AbstractInterpreter]: Visited 95 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 16. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:23:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:23:02,392 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:23:29,554 INFO L227 lantSequenceWeakener]: Weakened 183 states. On average, predicates are now at 72.91% of their original sizes. [2019-10-02 19:23:29,554 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:23:29,644 INFO L420 sIntCurrentIteration]: We unified 185 AI predicates to 185 [2019-10-02 19:23:29,644 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:23:29,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:23:29,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 19:23:29,645 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:23:29,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:23:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:23:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:23:29,646 INFO L87 Difference]: Start difference. First operand 437 states and 585 transitions. Second operand 10 states. [2019-10-02 19:27:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:27:50,826 INFO L93 Difference]: Finished difference Result 584 states and 744 transitions. [2019-10-02 19:27:50,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:27:50,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 186 [2019-10-02 19:27:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:27:50,830 INFO L225 Difference]: With dead ends: 584 [2019-10-02 19:27:50,830 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 19:27:50,831 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 19:27:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 19:27:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 19:27:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 19:27:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 742 transitions. [2019-10-02 19:27:50,859 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 742 transitions. Word has length 186 [2019-10-02 19:27:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:27:50,859 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 742 transitions. [2019-10-02 19:27:50,860 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:27:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 742 transitions. [2019-10-02 19:27:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-02 19:27:50,865 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:27:50,866 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:27:50,866 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:27:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:27:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash 600410558, now seen corresponding path program 1 times [2019-10-02 19:27:50,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:27:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:50,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:27:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:50,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:27:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:27:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:27:51,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:27:51,144 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:27:51,144 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 196 with the following transitions: [2019-10-02 19:27:51,145 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:27:51,149 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:27:51,149 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:28:01,893 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:28:21,511 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:28:21,512 INFO L272 AbstractInterpreter]: Visited 95 different actions 183 times. Merged at 3 different actions 3 times. Never widened. Performed 317 root evaluator evaluations with a maximum evaluation depth of 16. Performed 317 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:28:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:28:21,512 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:28:43,540 INFO L227 lantSequenceWeakener]: Weakened 192 states. On average, predicates are now at 72.9% of their original sizes. [2019-10-02 19:28:43,541 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:28:43,624 INFO L420 sIntCurrentIteration]: We unified 194 AI predicates to 194 [2019-10-02 19:28:43,625 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:28:43,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:28:43,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:28:43,625 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:28:43,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:28:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:28:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:28:43,627 INFO L87 Difference]: Start difference. First operand 582 states and 742 transitions. Second operand 11 states.