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/Problem02_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:38:31,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:38:31,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:38:31,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:38:31,397 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 17:38:31,412 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:38:31,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:38:31,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:38:31,413 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:38:31,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:38:31,414 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:38:31,414 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:38:31,414 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:38:31,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:38:31,415 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:38:31,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:38:31,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:38:31,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:38:31,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:38:31,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:38:31,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:38:31,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:38:31,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:38:31,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:38:31,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:38:31,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:38:31,418 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:38:31,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:38:31,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:38:31,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:38:31,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:38:31,419 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:38:31,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:38:31,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:38:31,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:38:31,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:38:31,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:38:31,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:38:31,472 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:38:31,472 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:38:31,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-02 17:38:31,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcc7c3fc/7f54325640b74b10912a6a67137440cf/FLAGf5afe253e [2019-10-02 17:38:32,124 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:38:32,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label50.c [2019-10-02 17:38:32,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcc7c3fc/7f54325640b74b10912a6a67137440cf/FLAGf5afe253e [2019-10-02 17:38:32,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bcc7c3fc/7f54325640b74b10912a6a67137440cf [2019-10-02 17:38:32,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:38:32,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:38:32,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:38:32,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:38:32,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:38:32,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:38:32" (1/1) ... [2019-10-02 17:38:32,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538e7e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:32, skipping insertion in model container [2019-10-02 17:38:32,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:38:32" (1/1) ... [2019-10-02 17:38:32,427 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:38:32,474 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:38:33,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:38:33,021 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:38:33,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:38:33,192 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:38:33,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33 WrapperNode [2019-10-02 17:38:33,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:38:33,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:38:33,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:38:33,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:38:33,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (1/1) ... [2019-10-02 17:38:33,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:38:33,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:38:33,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:38:33,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:38:33,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (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 17:38:33,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:38:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:38:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:38:33,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:38:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:38:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:38:34,597 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:38:34,597 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:38:34,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:38:34 BoogieIcfgContainer [2019-10-02 17:38:34,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:38:34,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:38:34,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:38:34,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:38:34,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:38:32" (1/3) ... [2019-10-02 17:38:34,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0d1d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:38:34, skipping insertion in model container [2019-10-02 17:38:34,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:38:33" (2/3) ... [2019-10-02 17:38:34,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0d1d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:38:34, skipping insertion in model container [2019-10-02 17:38:34,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:38:34" (3/3) ... [2019-10-02 17:38:34,608 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label50.c [2019-10-02 17:38:34,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:38:34,630 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:38:34,647 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:38:34,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:38:34,680 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:38:34,680 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:38:34,681 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:38:34,681 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:38:34,681 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:38:34,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:38:34,682 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:38:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-02 17:38:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-02 17:38:34,735 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:38:34,736 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, 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 17:38:34,741 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:38:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:38:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1330544841, now seen corresponding path program 1 times [2019-10-02 17:38:34,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:38:34,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:34,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:38:34,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:34,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:38:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:38:35,212 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 17:38:35,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:38:35,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:38:35,217 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:38:35,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:38:35,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:38:35,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:38:35,248 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-02 17:38:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:38:36,217 INFO L93 Difference]: Finished difference Result 388 states and 554 transitions. [2019-10-02 17:38:36,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:38:36,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-10-02 17:38:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:38:36,236 INFO L225 Difference]: With dead ends: 388 [2019-10-02 17:38:36,236 INFO L226 Difference]: Without dead ends: 320 [2019-10-02 17:38:36,238 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 17:38:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-02 17:38:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-02 17:38:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-02 17:38:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-02 17:38:36,313 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 87 [2019-10-02 17:38:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:38:36,314 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-02 17:38:36,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:38:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-02 17:38:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 17:38:36,321 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:38:36,322 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:38:36,322 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:38:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:38:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash 979586382, now seen corresponding path program 1 times [2019-10-02 17:38:36,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:38:36,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:36,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:38:36,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:36,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:38:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:38:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:38:36,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:38:36,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:38:36,439 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:38:36,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:38:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:38:36,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:38:36,441 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-10-02 17:38:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:38:37,037 INFO L93 Difference]: Finished difference Result 617 states and 866 transitions. [2019-10-02 17:38:37,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:38:37,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-02 17:38:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:38:37,044 INFO L225 Difference]: With dead ends: 617 [2019-10-02 17:38:37,044 INFO L226 Difference]: Without dead ends: 617 [2019-10-02 17:38:37,045 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 17:38:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-10-02 17:38:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 612. [2019-10-02 17:38:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-02 17:38:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 857 transitions. [2019-10-02 17:38:37,082 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 857 transitions. Word has length 95 [2019-10-02 17:38:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:38:37,083 INFO L475 AbstractCegarLoop]: Abstraction has 612 states and 857 transitions. [2019-10-02 17:38:37,083 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:38:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 857 transitions. [2019-10-02 17:38:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 17:38:37,089 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:38:37,089 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:38:37,089 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:38:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:38:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2117634278, now seen corresponding path program 1 times [2019-10-02 17:38:37,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:38:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:37,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:38:37,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:37,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:38:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:38:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:38:37,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:38:37,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:38:37,217 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:38:37,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:38:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:38:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:38:37,220 INFO L87 Difference]: Start difference. First operand 612 states and 857 transitions. Second operand 6 states. [2019-10-02 17:38:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:38:38,053 INFO L93 Difference]: Finished difference Result 1228 states and 1701 transitions. [2019-10-02 17:38:38,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:38:38,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-02 17:38:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:38:38,064 INFO L225 Difference]: With dead ends: 1228 [2019-10-02 17:38:38,065 INFO L226 Difference]: Without dead ends: 1228 [2019-10-02 17:38:38,065 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:38:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2019-10-02 17:38:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1212. [2019-10-02 17:38:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2019-10-02 17:38:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1654 transitions. [2019-10-02 17:38:38,134 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1654 transitions. Word has length 101 [2019-10-02 17:38:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:38:38,142 INFO L475 AbstractCegarLoop]: Abstraction has 1212 states and 1654 transitions. [2019-10-02 17:38:38,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:38:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1654 transitions. [2019-10-02 17:38:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 17:38:38,154 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:38:38,154 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:38:38,155 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:38:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:38:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2096741041, now seen corresponding path program 1 times [2019-10-02 17:38:38,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:38:38,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:38,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:38:38,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:38,159 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:38:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:38:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:38:38,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:38:38,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:38:38,287 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:38:38,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:38:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:38:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:38:38,288 INFO L87 Difference]: Start difference. First operand 1212 states and 1654 transitions. Second operand 6 states. [2019-10-02 17:38:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:38:39,242 INFO L93 Difference]: Finished difference Result 1832 states and 2493 transitions. [2019-10-02 17:38:39,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:38:39,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-02 17:38:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:38:39,258 INFO L225 Difference]: With dead ends: 1832 [2019-10-02 17:38:39,258 INFO L226 Difference]: Without dead ends: 1832 [2019-10-02 17:38:39,259 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:38:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-10-02 17:38:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1814. [2019-10-02 17:38:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2019-10-02 17:38:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2426 transitions. [2019-10-02 17:38:39,330 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2426 transitions. Word has length 109 [2019-10-02 17:38:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:38:39,330 INFO L475 AbstractCegarLoop]: Abstraction has 1814 states and 2426 transitions. [2019-10-02 17:38:39,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:38:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2426 transitions. [2019-10-02 17:38:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 17:38:39,337 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:38:39,337 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 17:38:39,338 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:38:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:38:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1866094056, now seen corresponding path program 1 times [2019-10-02 17:38:39,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:38:39,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:39,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:38:39,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:38:39,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:38:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:38:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-02 17:38:39,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:38:39,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:38:39,534 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 123 with the following transitions: [2019-10-02 17:38:39,537 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [25], [26], [30], [34], [38], [42], [53], [64], [68], [72], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [375], [377], [863], [867], [876], [880], [882], [887], [888], [889], [891], [892] [2019-10-02 17:38:39,614 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:38:39,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 17:50:04,449 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 17:50:04,452 INFO L272 AbstractInterpreter]: Visited 91 different actions 265 times. Merged at 6 different actions 12 times. Never widened. Performed 708 root evaluator evaluations with a maximum evaluation depth of 18. Performed 708 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Found 3 fixpoints after 2 different actions. Largest state had 38 variables. [2019-10-02 17:50:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:50:04,457 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates