/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/Problem02_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:36:59,952 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:37:00,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:37:00,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:37:00,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:37:00,038 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 01:37:00,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:37:00,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:37:00,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:37:00,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:37:00,075 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:37:00,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:37:00,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:37:00,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:37:00,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:37:00,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:37:00,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:37:00,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:37:00,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:37:00,079 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:37:00,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:37:00,080 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:37:00,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:37:00,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:37:00,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:37:00,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:37:00,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:37:00,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:37:00,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:37:00,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:37:00,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:37:00,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:37:00,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:37:00,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:37:00,084 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 01:37:00,367 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:37:00,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:37:00,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:37:00,393 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:37:00,394 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:37:00,395 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-11-07 01:37:00,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6e16615/86ed765c86c84bd088978b4986a8d89d/FLAGe33c4aaf4 [2019-11-07 01:37:01,049 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:37:01,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-11-07 01:37:01,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6e16615/86ed765c86c84bd088978b4986a8d89d/FLAGe33c4aaf4 [2019-11-07 01:37:01,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6e16615/86ed765c86c84bd088978b4986a8d89d [2019-11-07 01:37:01,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:37:01,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:37:01,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:01,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:37:01,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:37:01,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:01" (1/1) ... [2019-11-07 01:37:01,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cae922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:01, skipping insertion in model container [2019-11-07 01:37:01,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:01" (1/1) ... [2019-11-07 01:37:01,445 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:37:01,564 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:37:02,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:02,116 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:37:02,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:02,303 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:37:02,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02 WrapperNode [2019-11-07 01:37:02,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:02,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:37:02,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:37:02,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:37:02,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (1/1) ... [2019-11-07 01:37:02,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:37:02,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:37:02,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:37:02,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:37:02,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (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 01:37:02,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:37:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:37:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:37:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:37:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:37:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:37:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:37:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:37:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:37:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:37:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:37:04,477 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:37:04,477 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:37:04,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:04 BoogieIcfgContainer [2019-11-07 01:37:04,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:37:04,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:37:04,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:37:04,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:37:04,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:01" (1/3) ... [2019-11-07 01:37:04,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2fdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:04, skipping insertion in model container [2019-11-07 01:37:04,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:02" (2/3) ... [2019-11-07 01:37:04,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2fdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:04, skipping insertion in model container [2019-11-07 01:37:04,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:04" (3/3) ... [2019-11-07 01:37:04,487 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label00.c [2019-11-07 01:37:04,497 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:37:04,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:37:04,522 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:37:04,550 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:37:04,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:37:04,551 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:37:04,551 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:37:04,551 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:37:04,551 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:37:04,551 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:37:04,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:37:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:37:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:37:04,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:04,578 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:04,579 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:04,584 INFO L82 PathProgramCache]: Analyzing trace with hash -219361737, now seen corresponding path program 1 times [2019-11-07 01:37:04,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:04,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874114494] [2019-11-07 01:37:04,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:05,058 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 01:37:05,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874114494] [2019-11-07 01:37:05,060 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:05,061 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:37:05,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928936] [2019-11-07 01:37:05,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:37:05,071 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:05,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:37:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:37:05,092 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:37:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:05,669 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:37:05,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:37:05,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:37:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:05,694 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:37:05,694 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:37:05,700 INFO L630 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 [2019-11-07 01:37:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:37:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:37:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:37:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:37:05,811 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:37:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:05,814 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:37:05,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:37:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:37:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:37:05,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:05,852 INFO L410 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] [2019-11-07 01:37:05,852 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1874057074, now seen corresponding path program 1 times [2019-11-07 01:37:05,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:05,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809554327] [2019-11-07 01:37:05,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:37:05,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809554327] [2019-11-07 01:37:05,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:06,000 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:37:06,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174436522] [2019-11-07 01:37:06,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:37:06,002 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:06,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:37:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:37:06,003 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:37:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:06,759 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-11-07 01:37:06,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:37:06,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:37:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:06,765 INFO L225 Difference]: With dead ends: 547 [2019-11-07 01:37:06,766 INFO L226 Difference]: Without dead ends: 377 [2019-11-07 01:37:06,768 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 01:37:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-11-07 01:37:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-11-07 01:37:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:37:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 641 transitions. [2019-11-07 01:37:06,834 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 641 transitions. Word has length 101 [2019-11-07 01:37:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:06,835 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 641 transitions. [2019-11-07 01:37:06,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:37:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 641 transitions. [2019-11-07 01:37:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 01:37:06,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:06,838 INFO L410 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] [2019-11-07 01:37:06,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -852388825, now seen corresponding path program 1 times [2019-11-07 01:37:06,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:06,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133839885] [2019-11-07 01:37:06,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:37:06,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133839885] [2019-11-07 01:37:06,975 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:06,975 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:37:06,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085909262] [2019-11-07 01:37:06,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:37:06,977 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:37:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:37:06,979 INFO L87 Difference]: Start difference. First operand 355 states and 641 transitions. Second operand 3 states. [2019-11-07 01:37:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:07,422 INFO L93 Difference]: Finished difference Result 1051 states and 1977 transitions. [2019-11-07 01:37:07,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:37:07,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-11-07 01:37:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:07,429 INFO L225 Difference]: With dead ends: 1051 [2019-11-07 01:37:07,429 INFO L226 Difference]: Without dead ends: 701 [2019-11-07 01:37:07,433 INFO L630 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 [2019-11-07 01:37:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2019-11-07 01:37:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2019-11-07 01:37:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2019-11-07 01:37:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1226 transitions. [2019-11-07 01:37:07,489 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1226 transitions. Word has length 112 [2019-11-07 01:37:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:07,490 INFO L462 AbstractCegarLoop]: Abstraction has 701 states and 1226 transitions. [2019-11-07 01:37:07,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:37:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1226 transitions. [2019-11-07 01:37:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 01:37:07,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:07,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:37:07,495 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash -634097502, now seen corresponding path program 1 times [2019-11-07 01:37:07,496 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:07,496 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884580485] [2019-11-07 01:37:07,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:37:07,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884580485] [2019-11-07 01:37:07,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592196720] [2019-11-07 01:37:07,686 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 01:37:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:07,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:37:07,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:37:07,938 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 01:37:07,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:37:08,064 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 01:37:08,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270584668] [2019-11-07 01:37:08,117 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:37:08,117 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:37:08,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:37:08,140 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:37:08,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:37:08,287 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:37:08,825 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 145 [2019-11-07 01:37:09,592 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-11-07 01:37:16,902 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2019-11-07 01:37:17,227 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 25456 conjuctions. This might take some time... [2019-11-07 01:37:18,650 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2019-11-07 01:37:18,839 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 25456 conjuctions. This might take some time... [2019-11-07 01:37:20,817 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2019-11-07 01:37:21,102 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 25456 conjuctions. This might take some time... [2019-11-07 01:37:27,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:37:27,803 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:37:28,230 WARN L191 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-11-07 01:37:28,570 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:37:28,886 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-11-07 01:37:29,219 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-11-07 01:37:29,519 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-11-07 01:37:29,746 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:37:29,981 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2019-11-07 01:37:30,297 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2019-11-07 01:37:30,801 WARN L191 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2019-11-07 01:37:31,132 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2019-11-07 01:37:31,489 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2019-11-07 01:37:39,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:37:39,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 13] total 23 [2019-11-07 01:37:39,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069556176] [2019-11-07 01:37:39,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:37:39,972 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:39,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:37:39,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:37:39,973 INFO L87 Difference]: Start difference. First operand 701 states and 1226 transitions. Second operand 23 states. [2019-11-07 01:37:40,185 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:37:40,548 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2019-11-07 01:37:40,980 WARN L191 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2019-11-07 01:37:41,389 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 94 [2019-11-07 01:37:41,734 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-11-07 01:37:42,076 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2019-11-07 01:37:42,339 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2019-11-07 01:37:42,567 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72