/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:51:18,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:51:18,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:51:18,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:51:18,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:51:18,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:51:18,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:51:18,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:51:18,997 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:51:18,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:51:19,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:51:19,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:51:19,003 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:51:19,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:51:19,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:51:19,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:51:19,005 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:51:19,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:51:19,005 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:51:19,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:51:19,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:51:19,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:51:19,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:51:19,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:51:19,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:51:19,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:51:19,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:51:19,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:51:19,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:51:19,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:51:19,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:51:19,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:51:19,323 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:51:19,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:51:19,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:51:19,349 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:51:19,350 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:51:19,350 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-11-06 22:51:19,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19790c68/2bfa8ccd6c7d4897aa0aae7f048bf915/FLAGcbdb18e4d [2019-11-06 22:51:19,986 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:51:19,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-11-06 22:51:20,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19790c68/2bfa8ccd6c7d4897aa0aae7f048bf915/FLAGcbdb18e4d [2019-11-06 22:51:20,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b19790c68/2bfa8ccd6c7d4897aa0aae7f048bf915 [2019-11-06 22:51:20,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:51:20,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:51:20,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:51:20,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:51:20,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:51:20,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:20" (1/1) ... [2019-11-06 22:51:20,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788c53ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:20, skipping insertion in model container [2019-11-06 22:51:20,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:20" (1/1) ... [2019-11-06 22:51:20,303 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:51:20,362 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:51:20,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:51:20,999 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:51:21,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:51:21,248 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:51:21,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21 WrapperNode [2019-11-06 22:51:21,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:51:21,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:51:21,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:51:21,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:51:21,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (1/1) ... [2019-11-06 22:51:21,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:51:21,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:51:21,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:51:21,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:51:21,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (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 [2019-11-06 22:51:21,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:51:21,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:51:21,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:51:21,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:51:21,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:51:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:51:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:51:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:51:21,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:51:21,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:51:21,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:51:23,263 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:51:23,265 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:51:23,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:23 BoogieIcfgContainer [2019-11-06 22:51:23,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:51:23,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:51:23,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:51:23,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:51:23,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:20" (1/3) ... [2019-11-06 22:51:23,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152ccdd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:23, skipping insertion in model container [2019-11-06 22:51:23,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:21" (2/3) ... [2019-11-06 22:51:23,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152ccdd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:51:23, skipping insertion in model container [2019-11-06 22:51:23,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:51:23" (3/3) ... [2019-11-06 22:51:23,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-11-06 22:51:23,300 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:51:23,313 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:51:23,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:51:23,370 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:51:23,370 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:51:23,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:51:23,371 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:51:23,371 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:51:23,371 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:51:23,371 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:51:23,371 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:51:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 22:51:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 22:51:23,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:23,415 INFO L410 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] [2019-11-06 22:51:23,417 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-11-06 22:51:23,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:23,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920254486] [2019-11-06 22:51:23,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:23,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920254486] [2019-11-06 22:51:23,772 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:23,772 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:51:23,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296352083] [2019-11-06 22:51:23,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:51:23,782 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:51:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:51:23,801 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-11-06 22:51:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:25,143 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-11-06 22:51:25,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:51:25,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-06 22:51:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:25,162 INFO L225 Difference]: With dead ends: 688 [2019-11-06 22:51:25,162 INFO L226 Difference]: Without dead ends: 372 [2019-11-06 22:51:25,170 INFO L630 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 [2019-11-06 22:51:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-06 22:51:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-11-06 22:51:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-11-06 22:51:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-11-06 22:51:25,256 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 24 [2019-11-06 22:51:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:25,256 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-11-06 22:51:25,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:51:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-11-06 22:51:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:51:25,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:25,261 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:51:25,261 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-11-06 22:51:25,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:25,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657223555] [2019-11-06 22:51:25,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:25,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657223555] [2019-11-06 22:51:25,550 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:25,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:51:25,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711636475] [2019-11-06 22:51:25,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:51:25,553 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:51:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:51:25,554 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-11-06 22:51:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:26,880 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-11-06 22:51:26,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:51:26,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-11-06 22:51:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:26,885 INFO L225 Difference]: With dead ends: 936 [2019-11-06 22:51:26,886 INFO L226 Difference]: Without dead ends: 570 [2019-11-06 22:51:26,888 INFO L630 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 [2019-11-06 22:51:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-11-06 22:51:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-11-06 22:51:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-11-06 22:51:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-11-06 22:51:26,938 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 98 [2019-11-06 22:51:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:26,938 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-11-06 22:51:26,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:51:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-11-06 22:51:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:51:26,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:26,941 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:51:26,942 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-11-06 22:51:26,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:26,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607021357] [2019-11-06 22:51:26,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:27,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607021357] [2019-11-06 22:51:27,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:27,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:51:27,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255585166] [2019-11-06 22:51:27,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:51:27,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:51:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:27,090 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-11-06 22:51:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:28,815 INFO L93 Difference]: Finished difference Result 2218 states and 3287 transitions. [2019-11-06 22:51:28,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:51:28,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-11-06 22:51:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:28,828 INFO L225 Difference]: With dead ends: 2218 [2019-11-06 22:51:28,829 INFO L226 Difference]: Without dead ends: 1662 [2019-11-06 22:51:28,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-11-06 22:51:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2019-11-06 22:51:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2019-11-06 22:51:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2283 transitions. [2019-11-06 22:51:28,903 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2283 transitions. Word has length 107 [2019-11-06 22:51:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:28,904 INFO L462 AbstractCegarLoop]: Abstraction has 1662 states and 2283 transitions. [2019-11-06 22:51:28,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:51:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2283 transitions. [2019-11-06 22:51:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-06 22:51:28,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:28,911 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:51:28,912 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-11-06 22:51:28,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:28,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924592412] [2019-11-06 22:51:28,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:51:29,191 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924592412] [2019-11-06 22:51:29,191 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:51:29,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:51:29,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779310923] [2019-11-06 22:51:29,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:51:29,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:51:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:29,195 INFO L87 Difference]: Start difference. First operand 1662 states and 2283 transitions. Second operand 4 states. [2019-11-06 22:51:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:30,545 INFO L93 Difference]: Finished difference Result 5334 states and 7445 transitions. [2019-11-06 22:51:30,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:51:30,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-11-06 22:51:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:30,567 INFO L225 Difference]: With dead ends: 5334 [2019-11-06 22:51:30,567 INFO L226 Difference]: Without dead ends: 3678 [2019-11-06 22:51:30,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:51:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2019-11-06 22:51:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3678. [2019-11-06 22:51:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2019-11-06 22:51:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 4968 transitions. [2019-11-06 22:51:30,686 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 4968 transitions. Word has length 216 [2019-11-06 22:51:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:30,687 INFO L462 AbstractCegarLoop]: Abstraction has 3678 states and 4968 transitions. [2019-11-06 22:51:30,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:51:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 4968 transitions. [2019-11-06 22:51:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-11-06 22:51:30,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:30,696 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:51:30,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-11-06 22:51:30,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:30,697 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629052015] [2019-11-06 22:51:30,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:51:31,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629052015] [2019-11-06 22:51:31,533 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291427919] [2019-11-06 22:51:31,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:31,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:51:31,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:31,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 22:51:31,977 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:32,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:51:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:32,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:51:32,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-11-06 22:51:32,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764475825] [2019-11-06 22:51:32,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:51:32,626 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:51:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:51:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:51:32,627 INFO L87 Difference]: Start difference. First operand 3678 states and 4968 transitions. Second operand 5 states. [2019-11-06 22:51:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:51:34,003 INFO L93 Difference]: Finished difference Result 7942 states and 10714 transitions. [2019-11-06 22:51:34,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:51:34,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-11-06 22:51:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:51:34,028 INFO L225 Difference]: With dead ends: 7942 [2019-11-06 22:51:34,028 INFO L226 Difference]: Without dead ends: 4270 [2019-11-06 22:51:34,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 551 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:51:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2019-11-06 22:51:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3716. [2019-11-06 22:51:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3716 states. [2019-11-06 22:51:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4946 transitions. [2019-11-06 22:51:34,165 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4946 transitions. Word has length 278 [2019-11-06 22:51:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:51:34,166 INFO L462 AbstractCegarLoop]: Abstraction has 3716 states and 4946 transitions. [2019-11-06 22:51:34,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:51:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4946 transitions. [2019-11-06 22:51:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-11-06 22:51:34,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:51:34,175 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:51:34,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:34,380 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:51:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:51:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-11-06 22:51:34,380 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:51:34,381 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456147412] [2019-11-06 22:51:34,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:51:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 137 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:35,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456147412] [2019-11-06 22:51:35,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966384489] [2019-11-06 22:51:35,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:51:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:51:35,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 22:51:35,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:51:35,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:51:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 22:51:35,970 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:51:36,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:51:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:51:36,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [185946769] [2019-11-06 22:51:36,486 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 363 [2019-11-06 22:51:36,537 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:51:36,537 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)