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/Problem03_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 07:33:10,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 07:33:10,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 07:33:10,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 07:33:10,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 07:33:10,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 07:33:10,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 07:33:10,635 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 07:33:10,653 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 07:33:10,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 07:33:10,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 07:33:10,655 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 07:33:10,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 07:33:10,656 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 07:33:10,656 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 07:33:10,657 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 07:33:10,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 07:33:10,657 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 07:33:10,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 07:33:10,658 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 07:33:10,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 07:33:10,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 07:33:10,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 07:33:10,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 07:33:10,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 07:33:10,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 07:33:10,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 07:33:10,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 07:33:10,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 07:33:10,661 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 07:33:10,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 07:33:10,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:33:10,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 07:33:10,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 07:33:10,663 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 07:33:10,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 07:33:10,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 07:33:10,664 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 07:33:10,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 07:33:10,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 07:33:10,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 07:33:10,721 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 07:33:10,721 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 07:33:10,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2019-09-09 07:33:10,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c37e520/8f026b9fe78945a3a8fa407ba1653b5f/FLAGda2dd0c3d [2019-09-09 07:33:11,460 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 07:33:11,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21.c [2019-09-09 07:33:11,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c37e520/8f026b9fe78945a3a8fa407ba1653b5f/FLAGda2dd0c3d [2019-09-09 07:33:11,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c37e520/8f026b9fe78945a3a8fa407ba1653b5f [2019-09-09 07:33:11,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 07:33:11,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 07:33:11,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 07:33:11,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 07:33:11,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 07:33:11,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:33:11" (1/1) ... [2019-09-09 07:33:11,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56132ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:11, skipping insertion in model container [2019-09-09 07:33:11,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:33:11" (1/1) ... [2019-09-09 07:33:11,680 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 07:33:11,766 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 07:33:12,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:33:12,639 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 07:33:12,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:33:13,018 INFO L192 MainTranslator]: Completed translation [2019-09-09 07:33:13,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13 WrapperNode [2019-09-09 07:33:13,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 07:33:13,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 07:33:13,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 07:33:13,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 07:33:13,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... [2019-09-09 07:33:13,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 07:33:13,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 07:33:13,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 07:33:13,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 07:33:13,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:33:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 07:33:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 07:33:13,297 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 07:33:13,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 07:33:13,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 07:33:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 07:33:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 07:33:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 07:33:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 07:33:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 07:33:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 07:33:15,474 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 07:33:15,474 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 07:33:15,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:33:15 BoogieIcfgContainer [2019-09-09 07:33:15,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 07:33:15,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 07:33:15,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 07:33:15,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 07:33:15,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:33:11" (1/3) ... [2019-09-09 07:33:15,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190fc83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:33:15, skipping insertion in model container [2019-09-09 07:33:15,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:13" (2/3) ... [2019-09-09 07:33:15,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190fc83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:33:15, skipping insertion in model container [2019-09-09 07:33:15,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:33:15" (3/3) ... [2019-09-09 07:33:15,492 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2019-09-09 07:33:15,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 07:33:15,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 07:33:15,534 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 07:33:15,561 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 07:33:15,561 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 07:33:15,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 07:33:15,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 07:33:15,562 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 07:33:15,562 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 07:33:15,562 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 07:33:15,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 07:33:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 07:33:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-09 07:33:15,610 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:33:15,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:15,613 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:33:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:33:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -477681587, now seen corresponding path program 1 times [2019-09-09 07:33:15,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:33:15,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:15,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:33:15,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:15,659 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:33:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:33:16,379 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 07:33:16,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:33:16,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 07:33:16,382 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:33:16,388 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 07:33:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 07:33:16,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:33:16,405 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-09-09 07:33:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:33:17,968 INFO L93 Difference]: Finished difference Result 540 states and 817 transitions. [2019-09-09 07:33:17,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 07:33:17,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-09-09 07:33:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:33:18,006 INFO L225 Difference]: With dead ends: 540 [2019-09-09 07:33:18,007 INFO L226 Difference]: Without dead ends: 472 [2019-09-09 07:33:18,010 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:33:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-09-09 07:33:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2019-09-09 07:33:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2019-09-09 07:33:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 716 transitions. [2019-09-09 07:33:18,092 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 716 transitions. Word has length 208 [2019-09-09 07:33:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:33:18,094 INFO L475 AbstractCegarLoop]: Abstraction has 470 states and 716 transitions. [2019-09-09 07:33:18,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 07:33:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 716 transitions. [2019-09-09 07:33:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-09 07:33:18,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:33:18,110 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:18,111 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:33:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:33:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash 248467897, now seen corresponding path program 1 times [2019-09-09 07:33:18,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:33:18,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:18,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:33:18,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:18,115 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:33:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:33:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:33:18,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:33:18,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 07:33:18,563 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:33:18,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 07:33:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 07:33:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:33:18,566 INFO L87 Difference]: Start difference. First operand 470 states and 716 transitions. Second operand 3 states. [2019-09-09 07:33:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:33:19,860 INFO L93 Difference]: Finished difference Result 903 states and 1373 transitions. [2019-09-09 07:33:19,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 07:33:19,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2019-09-09 07:33:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:33:19,868 INFO L225 Difference]: With dead ends: 903 [2019-09-09 07:33:19,868 INFO L226 Difference]: Without dead ends: 903 [2019-09-09 07:33:19,869 INFO L628 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 [2019-09-09 07:33:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2019-09-09 07:33:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 887. [2019-09-09 07:33:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2019-09-09 07:33:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1341 transitions. [2019-09-09 07:33:19,914 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1341 transitions. Word has length 220 [2019-09-09 07:33:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:33:19,915 INFO L475 AbstractCegarLoop]: Abstraction has 887 states and 1341 transitions. [2019-09-09 07:33:19,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 07:33:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1341 transitions. [2019-09-09 07:33:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-09 07:33:19,920 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:33:19,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:19,921 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:33:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:33:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash -552719674, now seen corresponding path program 1 times [2019-09-09 07:33:19,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:33:19,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:19,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:33:19,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:19,924 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:33:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:33:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:33:20,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:33:20,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:33:20,077 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:33:20,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:33:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:33:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:33:20,079 INFO L87 Difference]: Start difference. First operand 887 states and 1341 transitions. Second operand 6 states. [2019-09-09 07:33:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:33:21,681 INFO L93 Difference]: Finished difference Result 1767 states and 2529 transitions. [2019-09-09 07:33:21,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:33:21,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 235 [2019-09-09 07:33:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:33:21,703 INFO L225 Difference]: With dead ends: 1767 [2019-09-09 07:33:21,704 INFO L226 Difference]: Without dead ends: 1767 [2019-09-09 07:33:21,705 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 07:33:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2019-09-09 07:33:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1741. [2019-09-09 07:33:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2019-09-09 07:33:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2442 transitions. [2019-09-09 07:33:21,827 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2442 transitions. Word has length 235 [2019-09-09 07:33:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:33:21,836 INFO L475 AbstractCegarLoop]: Abstraction has 1741 states and 2442 transitions. [2019-09-09 07:33:21,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:33:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2442 transitions. [2019-09-09 07:33:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-09 07:33:21,851 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:33:21,851 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:21,852 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:33:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:33:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1027869185, now seen corresponding path program 1 times [2019-09-09 07:33:21,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:33:21,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:21,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:33:21,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:33:21,854 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:33:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:33:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:33:22,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 07:33:22,065 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 07:33:22,067 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2019-09-09 07:33:22,070 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1133], [1135], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 07:33:22,143 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 07:33:22,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)