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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:57:32,009 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-07 00:57:32,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:57:32,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:57:32,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:57:32,083 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 [2019-10-07 00:57:32,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:57:32,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:57:32,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:57:32,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:57:32,098 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:57:32,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:57:32,099 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:57:32,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:57:32,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:57:32,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:57:32,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:57:32,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:57:32,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:57:32,100 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:57:32,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:57:32,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:57:32,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:57:32,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:57:32,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:57:32,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:57:32,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:57:32,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:57:32,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:57:32,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:57:32,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:57:32,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:57:32,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:57:32,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:57:32,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 00:57:32,359 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:57:32,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:57:32,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:57:32,377 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:57:32,377 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:57:32,378 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-07 00:57:32,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f133de92e/9aaaf0fb0343403e9fa5cc83b2120d10/FLAG1a901de70 [2019-10-07 00:57:33,046 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:57:33,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-07 00:57:33,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f133de92e/9aaaf0fb0343403e9fa5cc83b2120d10/FLAG1a901de70 [2019-10-07 00:57:33,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f133de92e/9aaaf0fb0343403e9fa5cc83b2120d10 [2019-10-07 00:57:33,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:57:33,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:57:33,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:57:33,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:57:33,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:57:33,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:57:33" (1/1) ... [2019-10-07 00:57:33,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:33, skipping insertion in model container [2019-10-07 00:57:33,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:57:33" (1/1) ... [2019-10-07 00:57:33,323 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:57:33,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:57:33,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:57:33,947 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:57:34,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:57:34,070 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:57:34,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34 WrapperNode [2019-10-07 00:57:34,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:57:34,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:57:34,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:57:34,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:57:34,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... [2019-10-07 00:57:34,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:57:34,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:57:34,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:57:34,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:57:34,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:57:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:57:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:57:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:57:34,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:57:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:57:34,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:57:36,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:57:36,295 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:57:36,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:57:36 BoogieIcfgContainer [2019-10-07 00:57:36,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:57:36,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:57:36,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:57:36,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:57:36,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:57:33" (1/3) ... [2019-10-07 00:57:36,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e76615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:57:36, skipping insertion in model container [2019-10-07 00:57:36,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:57:34" (2/3) ... [2019-10-07 00:57:36,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e76615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:57:36, skipping insertion in model container [2019-10-07 00:57:36,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:57:36" (3/3) ... [2019-10-07 00:57:36,305 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2019-10-07 00:57:36,315 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:57:36,323 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:57:36,335 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:57:36,361 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:57:36,361 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:57:36,361 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:57:36,362 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:57:36,362 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:57:36,362 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:57:36,362 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:57:36,362 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:57:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-07 00:57:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-07 00:57:36,394 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:36,395 INFO L385 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] [2019-10-07 00:57:36,397 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -219369161, now seen corresponding path program 1 times [2019-10-07 00:57:36,413 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:36,413 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:36,414 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:36,414 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:36,862 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:36,863 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:36,864 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:57:36,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:57:36,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:57:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:36,889 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-07 00:57:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:37,479 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-07 00:57:37,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:57:37,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-07 00:57:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:37,497 INFO L225 Difference]: With dead ends: 273 [2019-10-07 00:57:37,497 INFO L226 Difference]: Without dead ends: 175 [2019-10-07 00:57:37,502 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-07 00:57:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-07 00:57:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-07 00:57:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-07 00:57:37,572 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-07 00:57:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:37,573 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-07 00:57:37,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:57:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-07 00:57:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-07 00:57:37,579 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:37,579 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 00:57:37,580 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1874064498, now seen corresponding path program 1 times [2019-10-07 00:57:37,581 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:37,581 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:37,581 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:37,581 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:37,739 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:37,739 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:37,740 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:57:37,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:57:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:57:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:57:37,742 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-07 00:57:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:38,121 INFO L93 Difference]: Finished difference Result 351 states and 663 transitions. [2019-10-07 00:57:38,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 00:57:38,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-07 00:57:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:38,127 INFO L225 Difference]: With dead ends: 351 [2019-10-07 00:57:38,127 INFO L226 Difference]: Without dead ends: 181 [2019-10-07 00:57:38,129 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 00:57:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-07 00:57:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-10-07 00:57:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-07 00:57:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 299 transitions. [2019-10-07 00:57:38,148 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 299 transitions. Word has length 101 [2019-10-07 00:57:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:38,148 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 299 transitions. [2019-10-07 00:57:38,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:57:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 299 transitions. [2019-10-07 00:57:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-07 00:57:38,151 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:38,151 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:57:38,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1307307617, now seen corresponding path program 1 times [2019-10-07 00:57:38,152 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:38,152 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:38,153 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:38,153 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:38,276 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:38,277 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:38,278 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:57:38,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:57:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:57:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:57:38,280 INFO L87 Difference]: Start difference. First operand 177 states and 299 transitions. Second operand 6 states. [2019-10-07 00:57:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:38,887 INFO L93 Difference]: Finished difference Result 453 states and 784 transitions. [2019-10-07 00:57:38,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:57:38,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-07 00:57:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:38,893 INFO L225 Difference]: With dead ends: 453 [2019-10-07 00:57:38,894 INFO L226 Difference]: Without dead ends: 281 [2019-10-07 00:57:38,896 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 00:57:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-07 00:57:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2019-10-07 00:57:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-07 00:57:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 433 transitions. [2019-10-07 00:57:38,921 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 433 transitions. Word has length 108 [2019-10-07 00:57:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:38,921 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 433 transitions. [2019-10-07 00:57:38,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:57:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 433 transitions. [2019-10-07 00:57:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-07 00:57:38,925 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:38,925 INFO L385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:57:38,925 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -852396249, now seen corresponding path program 1 times [2019-10-07 00:57:38,926 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:38,926 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:38,926 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:38,927 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:39,020 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:39,021 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:57:39,021 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:57:39,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:57:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:57:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:39,025 INFO L87 Difference]: Start difference. First operand 267 states and 433 transitions. Second operand 3 states. [2019-10-07 00:57:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:39,480 INFO L93 Difference]: Finished difference Result 703 states and 1156 transitions. [2019-10-07 00:57:39,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:57:39,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-07 00:57:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:39,484 INFO L225 Difference]: With dead ends: 703 [2019-10-07 00:57:39,485 INFO L226 Difference]: Without dead ends: 441 [2019-10-07 00:57:39,486 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:57:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-10-07 00:57:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2019-10-07 00:57:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-07 00:57:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 643 transitions. [2019-10-07 00:57:39,537 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 643 transitions. Word has length 112 [2019-10-07 00:57:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:39,541 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 643 transitions. [2019-10-07 00:57:39,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:57:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 643 transitions. [2019-10-07 00:57:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-07 00:57:39,552 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:39,553 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:57:39,553 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 5336562, now seen corresponding path program 1 times [2019-10-07 00:57:39,554 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:39,555 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:39,555 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:39,555 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:57:39,801 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:39,802 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:57:39,802 INFO L95 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 [2019-10-07 00:57:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:39,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:57:39,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:57:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:57:39,977 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:57:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:57:40,042 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 00:57:40,042 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-07 00:57:40,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:57:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:57:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-07 00:57:40,045 INFO L87 Difference]: Start difference. First operand 441 states and 643 transitions. Second operand 3 states. [2019-10-07 00:57:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:57:40,459 INFO L93 Difference]: Finished difference Result 1217 states and 1814 transitions. [2019-10-07 00:57:40,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:57:40,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-07 00:57:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:57:40,466 INFO L225 Difference]: With dead ends: 1217 [2019-10-07 00:57:40,466 INFO L226 Difference]: Without dead ends: 609 [2019-10-07 00:57:40,468 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-07 00:57:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-07 00:57:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-07 00:57:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-07 00:57:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 760 transitions. [2019-10-07 00:57:40,493 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 760 transitions. Word has length 121 [2019-10-07 00:57:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:57:40,494 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 760 transitions. [2019-10-07 00:57:40,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:57:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 760 transitions. [2019-10-07 00:57:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-07 00:57:40,498 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:57:40,498 INFO L385 BasicCegarLoop]: trace histogram [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, 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] [2019-10-07 00:57:40,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:57:40,704 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:57:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:57:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1090347318, now seen corresponding path program 1 times [2019-10-07 00:57:40,706 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:57:40,706 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:40,706 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:40,707 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:57:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:57:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 00:57:40,912 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:57:40,912 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:57:40,913 INFO L95 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 [2019-10-07 00:57:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:57:41,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:57:41,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:57:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:57:41,140 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:57:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 00:57:41,291 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:57:41,362 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-07 00:57:41,362 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:57:41,380 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:57:41,394 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:57:41,397 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:57:41,796 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-07 00:57:42,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:57:42,451 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 00:57:42,461 INFO L168 Benchmark]: Toolchain (without parser) took 9152.74 ms. Allocated memory was 137.9 MB in the beginning and 335.0 MB in the end (delta: 197.1 MB). Free memory was 101.3 MB in the beginning and 223.7 MB in the end (delta: -122.4 MB). Peak memory consumption was 74.8 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,462 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.18 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 101.1 MB in the beginning and 170.0 MB in the end (delta: -68.9 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,465 INFO L168 Benchmark]: Boogie Preprocessor took 106.88 ms. Allocated memory is still 205.0 MB. Free memory was 170.0 MB in the beginning and 165.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,467 INFO L168 Benchmark]: RCFGBuilder took 2117.78 ms. Allocated memory was 205.0 MB in the beginning and 251.7 MB in the end (delta: 46.7 MB). Free memory was 165.0 MB in the beginning and 201.8 MB in the end (delta: -36.8 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,472 INFO L168 Benchmark]: TraceAbstraction took 6156.99 ms. Allocated memory was 251.7 MB in the beginning and 335.0 MB in the end (delta: 83.4 MB). Free memory was 201.8 MB in the beginning and 223.7 MB in the end (delta: -21.8 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. [2019-10-07 00:57:42,480 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 764.18 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 101.1 MB in the beginning and 170.0 MB in the end (delta: -68.9 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.88 ms. Allocated memory is still 205.0 MB. Free memory was 170.0 MB in the beginning and 165.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2117.78 ms. Allocated memory was 205.0 MB in the beginning and 251.7 MB in the end (delta: 46.7 MB). Free memory was 165.0 MB in the beginning and 201.8 MB in the end (delta: -36.8 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6156.99 ms. Allocated memory was 251.7 MB in the beginning and 335.0 MB in the end (delta: 83.4 MB). Free memory was 201.8 MB in the beginning and 223.7 MB in the end (delta: -21.8 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...