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/Problem16_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:25:13,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:25:13,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:25:13,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:25:13,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:25:13,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:25:13,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:25:13,193 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 [2019-09-09 20:25:13,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:25:13,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:25:13,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:25:13,209 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:25:13,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:25:13,209 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:25:13,210 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:25:13,210 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:25:13,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:25:13,210 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:25:13,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:25:13,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:25:13,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:25:13,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:25:13,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:25:13,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:25:13,213 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:25:13,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:25:13,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:25:13,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:25:13,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:25:13,214 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:25:13,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:25:13,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:25:13,216 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:25:13,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:25:13,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:25:13,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:25:13,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:25:13,282 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:25:13,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-09-09 20:25:13,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a558019/33ed7da494944afdbac9765a69d584af/FLAG3035b91b6 [2019-09-09 20:25:14,005 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:25:14,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-09-09 20:25:14,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a558019/33ed7da494944afdbac9765a69d584af/FLAG3035b91b6 [2019-09-09 20:25:14,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a558019/33ed7da494944afdbac9765a69d584af [2019-09-09 20:25:14,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:25:14,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:25:14,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:25:14,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:25:14,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:25:14,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:25:14" (1/1) ... [2019-09-09 20:25:14,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720701ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:14, skipping insertion in model container [2019-09-09 20:25:14,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:25:14" (1/1) ... [2019-09-09 20:25:14,201 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:25:14,277 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:25:15,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:25:15,116 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:25:15,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:25:15,485 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:25:15,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15 WrapperNode [2019-09-09 20:25:15,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:25:15,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:25:15,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:25:15,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:25:15,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (1/1) ... [2019-09-09 20:25:15,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:25:15,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:25:15,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:25:15,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:25:15,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (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 [2019-09-09 20:25:15,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:25:15,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:25:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:25:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:25:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:25:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:25:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:25:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:25:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:25:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:25:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:25:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:25:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:25:18,057 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:25:18,057 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:25:18,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:25:18 BoogieIcfgContainer [2019-09-09 20:25:18,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:25:18,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:25:18,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:25:18,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:25:18,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:25:14" (1/3) ... [2019-09-09 20:25:18,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:25:18, skipping insertion in model container [2019-09-09 20:25:18,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:25:15" (2/3) ... [2019-09-09 20:25:18,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:25:18, skipping insertion in model container [2019-09-09 20:25:18,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:25:18" (3/3) ... [2019-09-09 20:25:18,071 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-09-09 20:25:18,081 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:25:18,092 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:25:18,110 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:25:18,142 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:25:18,142 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:25:18,142 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:25:18,142 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:25:18,142 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:25:18,142 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:25:18,143 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:25:18,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:25:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:25:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-09 20:25:18,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:18,194 INFO L399 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] [2019-09-09 20:25:18,196 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 697070738, now seen corresponding path program 1 times [2019-09-09 20:25:18,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:18,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:18,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:18,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:18,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:18,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:18,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:25:18,635 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:18,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:25:18,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:25:18,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:25:18,664 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-09-09 20:25:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:22,324 INFO L93 Difference]: Finished difference Result 1106 states and 1937 transitions. [2019-09-09 20:25:22,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:25:22,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-09-09 20:25:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:22,362 INFO L225 Difference]: With dead ends: 1106 [2019-09-09 20:25:22,362 INFO L226 Difference]: Without dead ends: 1019 [2019-09-09 20:25:22,364 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:25:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-09-09 20:25:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-09-09 20:25:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:25:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-09-09 20:25:22,467 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 55 [2019-09-09 20:25:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:22,468 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-09-09 20:25:22,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:25:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-09-09 20:25:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 20:25:22,474 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:22,475 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-09-09 20:25:22,475 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1449951553, now seen corresponding path program 1 times [2019-09-09 20:25:22,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:22,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:22,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:22,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:22,478 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:22,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:22,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:25:22,630 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:22,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:25:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:25:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:25:22,633 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-09-09 20:25:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:25,474 INFO L93 Difference]: Finished difference Result 1392 states and 2319 transitions. [2019-09-09 20:25:25,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:25,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-09-09 20:25:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:25,485 INFO L225 Difference]: With dead ends: 1392 [2019-09-09 20:25:25,485 INFO L226 Difference]: Without dead ends: 1392 [2019-09-09 20:25:25,486 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 20:25:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-09-09 20:25:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-09-09 20:25:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-09-09 20:25:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-09-09 20:25:25,547 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 124 [2019-09-09 20:25:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:25,548 INFO L475 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-09-09 20:25:25,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:25:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-09-09 20:25:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 20:25:25,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:25,554 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-09-09 20:25:25,554 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1240041174, now seen corresponding path program 1 times [2019-09-09 20:25:25,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:25,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:25,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:25,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:25,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:25:25,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:25:25,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:25:25,681 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:25,682 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:25:25,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:25:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:25:25,683 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-09-09 20:25:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:25:28,440 INFO L93 Difference]: Finished difference Result 2095 states and 3351 transitions. [2019-09-09 20:25:28,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:25:28,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-09-09 20:25:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:25:28,454 INFO L225 Difference]: With dead ends: 2095 [2019-09-09 20:25:28,454 INFO L226 Difference]: Without dead ends: 2095 [2019-09-09 20:25:28,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:25:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-09-09 20:25:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-09-09 20:25:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-09-09 20:25:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3297 transitions. [2019-09-09 20:25:28,523 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3297 transitions. Word has length 127 [2019-09-09 20:25:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:25:28,524 INFO L475 AbstractCegarLoop]: Abstraction has 2077 states and 3297 transitions. [2019-09-09 20:25:28,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:25:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3297 transitions. [2019-09-09 20:25:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-09 20:25:28,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:25:28,531 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:25:28,532 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:25:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash 164482690, now seen corresponding path program 1 times [2019-09-09 20:25:28,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:25:28,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:28,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:25:28,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:25:28,534 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:25:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:25:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 96 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:25:28,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:25:28,761 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:25:28,762 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2019-09-09 20:25:28,764 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [764], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:25:28,814 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:25:28,815 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:25:33,877 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:25:33,879 INFO L272 AbstractInterpreter]: Visited 97 different actions 97 times. Never merged. Never widened. Performed 233 root evaluator evaluations with a maximum evaluation depth of 14. Performed 233 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:25:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:25:33,883 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:25:37,554 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 78.26% of their original sizes. [2019-09-09 20:25:37,555 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:25:37,657 INFO L420 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2019-09-09 20:25:37,657 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:25:37,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:25:37,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 20:25:37,658 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:25:37,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:25:37,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:25:37,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:25:37,660 INFO L87 Difference]: Start difference. First operand 2077 states and 3297 transitions. Second operand 11 states. [2019-09-09 20:25:57,494 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.