/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 --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/Problem16_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:02:39,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:02:39,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:02:39,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 02:02:39,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:02:39,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:02:39,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:02:39,282 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 [2019-11-07 02:02:39,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:02:39,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:02:39,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:02:39,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:02:39,317 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:02:39,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:02:39,317 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:02:39,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:02:39,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:02:39,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:02:39,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:02:39,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:02:39,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:02:39,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:02:39,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:02:39,319 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:02:39,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:02:39,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:02:39,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:02:39,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:02:39,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:02:39,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:02:39,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:02:39,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:02:39,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:02:39,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:02:39,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:02:39,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:02:39,325 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 [2019-11-07 02:02:39,611 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:02:39,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:02:39,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:02:39,629 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:02:39,630 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:02:39,630 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-11-07 02:02:39,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ffb30d9c/d12f7ca291874f24b69cf11044ae6f50/FLAG1c72bfae8 [2019-11-07 02:02:40,316 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:02:40,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-11-07 02:02:40,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ffb30d9c/d12f7ca291874f24b69cf11044ae6f50/FLAG1c72bfae8 [2019-11-07 02:02:40,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ffb30d9c/d12f7ca291874f24b69cf11044ae6f50 [2019-11-07 02:02:40,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:02:40,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:02:40,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:40,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:02:40,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:02:40,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:40" (1/1) ... [2019-11-07 02:02:40,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9639fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:40, skipping insertion in model container [2019-11-07 02:02:40,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:40" (1/1) ... [2019-11-07 02:02:40,566 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:02:40,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:02:41,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:41,522 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:02:41,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:02:41,917 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:02:41,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41 WrapperNode [2019-11-07 02:02:41,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:02:41,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:02:41,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:02:41,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:02:41,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:41,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:41,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:41,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:42,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:42,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:42,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (1/1) ... [2019-11-07 02:02:42,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:02:42,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:02:42,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:02:42,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:02:42,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (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 [2019-11-07 02:02:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:02:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:02:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 02:02:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-07 02:02:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:02:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 02:02:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-07 02:02:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:02:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:02:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:02:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:02:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:02:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:02:59,108 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:02:59,108 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 02:02:59,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:59 BoogieIcfgContainer [2019-11-07 02:02:59,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:02:59,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:02:59,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:02:59,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:02:59,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:40" (1/3) ... [2019-11-07 02:02:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac4e392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:59, skipping insertion in model container [2019-11-07 02:02:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:41" (2/3) ... [2019-11-07 02:02:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac4e392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:59, skipping insertion in model container [2019-11-07 02:02:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:59" (3/3) ... [2019-11-07 02:02:59,120 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2019-11-07 02:02:59,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:02:59,137 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:02:59,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:02:59,177 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:02:59,177 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:02:59,177 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:02:59,177 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:02:59,245 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:02:59,245 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:02:59,245 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:02:59,245 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:02:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-11-07 02:02:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 02:02:59,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:02:59,283 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:02:59,285 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:02:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:02:59,291 INFO L82 PathProgramCache]: Analyzing trace with hash 863564863, now seen corresponding path program 1 times [2019-11-07 02:02:59,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:02:59,300 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971367598] [2019-11-07 02:02:59,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:02:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:02:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:02:59,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971367598] [2019-11-07 02:02:59,551 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:02:59,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 02:02:59,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981773654] [2019-11-07 02:02:59,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 02:02:59,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:02:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 02:02:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:02:59,582 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-11-07 02:03:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:03:01,391 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-11-07 02:03:01,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 02:03:01,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-07 02:03:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:03:01,418 INFO L225 Difference]: With dead ends: 718 [2019-11-07 02:03:01,418 INFO L226 Difference]: Without dead ends: 471 [2019-11-07 02:03:01,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:03:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-11-07 02:03:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2019-11-07 02:03:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-11-07 02:03:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2019-11-07 02:03:01,528 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2019-11-07 02:03:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:03:01,529 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2019-11-07 02:03:01,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 02:03:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2019-11-07 02:03:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 02:03:01,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:03:01,536 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:03:01,536 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:03:01,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:03:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash 76450537, now seen corresponding path program 1 times [2019-11-07 02:03:01,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:03:01,538 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869068787] [2019-11-07 02:03:01,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:03:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:01,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869068787] [2019-11-07 02:03:01,728 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:03:01,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 02:03:01,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789426086] [2019-11-07 02:03:01,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:03:01,731 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:03:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:03:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:03:01,732 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand 5 states. [2019-11-07 02:03:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:03:04,196 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2019-11-07 02:03:04,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:03:04,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-07 02:03:04,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:03:04,208 INFO L225 Difference]: With dead ends: 1387 [2019-11-07 02:03:04,208 INFO L226 Difference]: Without dead ends: 931 [2019-11-07 02:03:04,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-07 02:03:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-11-07 02:03:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2019-11-07 02:03:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-11-07 02:03:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2019-11-07 02:03:04,274 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2019-11-07 02:03:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:03:04,274 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2019-11-07 02:03:04,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:03:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2019-11-07 02:03:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-07 02:03:04,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:03:04,277 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:03:04,277 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:03:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:03:04,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2007878310, now seen corresponding path program 1 times [2019-11-07 02:03:04,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:03:04,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063775248] [2019-11-07 02:03:04,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:03:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 02:03:04,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063775248] [2019-11-07 02:03:04,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392408515] [2019-11-07 02:03:04,421 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 [2019-11-07 02:03:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:04,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 02:03:04,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:03:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:04,581 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:03:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:04,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 02:03:04,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-07 02:03:04,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967493871] [2019-11-07 02:03:04,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:03:04,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:03:04,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:03:04,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:03:04,626 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand 4 states. [2019-11-07 02:03:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:03:08,438 INFO L93 Difference]: Finished difference Result 3199 states and 5284 transitions. [2019-11-07 02:03:08,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:03:08,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-11-07 02:03:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:03:08,455 INFO L225 Difference]: With dead ends: 3199 [2019-11-07 02:03:08,456 INFO L226 Difference]: Without dead ends: 2281 [2019-11-07 02:03:08,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:03:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2019-11-07 02:03:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1383. [2019-11-07 02:03:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2019-11-07 02:03:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2349 transitions. [2019-11-07 02:03:08,520 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2349 transitions. Word has length 52 [2019-11-07 02:03:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:03:08,521 INFO L462 AbstractCegarLoop]: Abstraction has 1383 states and 2349 transitions. [2019-11-07 02:03:08,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:03:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2349 transitions. [2019-11-07 02:03:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 02:03:08,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:03:08,524 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:03:08,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:03:08,728 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:03:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:03:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2075711313, now seen corresponding path program 1 times [2019-11-07 02:03:08,729 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:03:08,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683790937] [2019-11-07 02:03:08,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:03:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:08,925 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683790937] [2019-11-07 02:03:08,926 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:03:08,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 02:03:08,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910206793] [2019-11-07 02:03:08,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 02:03:08,928 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:03:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 02:03:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:03:08,929 INFO L87 Difference]: Start difference. First operand 1383 states and 2349 transitions. Second operand 6 states. [2019-11-07 02:03:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:03:11,258 INFO L93 Difference]: Finished difference Result 3470 states and 5914 transitions. [2019-11-07 02:03:11,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:03:11,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2019-11-07 02:03:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:03:11,282 INFO L225 Difference]: With dead ends: 3470 [2019-11-07 02:03:11,283 INFO L226 Difference]: Without dead ends: 2092 [2019-11-07 02:03:11,289 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 [2019-11-07 02:03:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2019-11-07 02:03:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 2053. [2019-11-07 02:03:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2019-11-07 02:03:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3141 transitions. [2019-11-07 02:03:11,406 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3141 transitions. Word has length 67 [2019-11-07 02:03:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:03:11,409 INFO L462 AbstractCegarLoop]: Abstraction has 2053 states and 3141 transitions. [2019-11-07 02:03:11,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 02:03:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3141 transitions. [2019-11-07 02:03:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 02:03:11,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:03:11,422 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:03:11,422 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:03:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:03:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1007646247, now seen corresponding path program 1 times [2019-11-07 02:03:11,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:03:11,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688939289] [2019-11-07 02:03:11,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:03:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:11,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688939289] [2019-11-07 02:03:11,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980018061] [2019-11-07 02:03:11,728 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 [2019-11-07 02:03:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:03:11,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 02:03:11,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:03:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:11,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:03:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:03:11,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909624312] [2019-11-07 02:03:12,004 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2019-11-07 02:03:12,004 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:03:12,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:03:12,018 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:03:12,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:03:12,142 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-11-07 02:03:12,237 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-11-07 02:03:12,419 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-11-07 02:03:12,588 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-11-07 02:03:12,629 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20