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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:53:50,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:53:50,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:53:50,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:53:50,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:53:50,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:53:50,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:53:50,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:53:50,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:53:50,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:53:50,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:53:50,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:53:50,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:53:50,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:53:50,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:53:50,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:53:50,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:53:50,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:53:50,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:53:50,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:53:50,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:53:50,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:53:50,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:53:50,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:53:50,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:53:50,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:53:50,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:53:50,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:53:50,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:53:50,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:53:50,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:53:50,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:53:50,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:53:50,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:53:50,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:53:50,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:53:50,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:53:50,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:53:50,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:53:50,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:53:50,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:53:50,358 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 [2019-10-13 21:53:50,376 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:53:50,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:53:50,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:53:50,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:53:50,381 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:53:50,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:53:50,382 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:53:50,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:53:50,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:53:50,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:53:50,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:53:50,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:53:50,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:53:50,384 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:53:50,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:53:50,385 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:53:50,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:53:50,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:53:50,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:53:50,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:53:50,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:53:50,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:53:50,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:53:50,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:53:50,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:53:50,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:53:50,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:53:50,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:53:50,387 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 [2019-10-13 21:53:50,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:53:50,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:53:50,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:53:50,699 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:53:50,700 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:53:50,700 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-10-13 21:53:50,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233e7dee2/779b8debc21a40f6a19cd9b58ed62edc/FLAGa85da4222 [2019-10-13 21:53:51,340 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:53:51,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39.c [2019-10-13 21:53:51,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233e7dee2/779b8debc21a40f6a19cd9b58ed62edc/FLAGa85da4222 [2019-10-13 21:53:51,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233e7dee2/779b8debc21a40f6a19cd9b58ed62edc [2019-10-13 21:53:51,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:53:51,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:53:51,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:51,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:53:51,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:53:51,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:51" (1/1) ... [2019-10-13 21:53:51,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:51, skipping insertion in model container [2019-10-13 21:53:51,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:51" (1/1) ... [2019-10-13 21:53:51,594 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:53:51,671 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:53:52,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:52,653 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:53:52,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:52,942 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:53:52,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52 WrapperNode [2019-10-13 21:53:52,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:52,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:53:52,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:53:52,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:53:52,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:52,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:52,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:52,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:53,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:53,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:53,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (1/1) ... [2019-10-13 21:53:53,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:53:53,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:53:53,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:53:53,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:53:53,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (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 [2019-10-13 21:53:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:53:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:53:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:53:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:53:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:53:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:53:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:53:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:53:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:53:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:53:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:53:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:53:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:54:01,380 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:54:01,381 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:54:01,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:01 BoogieIcfgContainer [2019-10-13 21:54:01,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:54:01,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:54:01,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:54:01,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:54:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:53:51" (1/3) ... [2019-10-13 21:54:01,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60916e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:01, skipping insertion in model container [2019-10-13 21:54:01,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:52" (2/3) ... [2019-10-13 21:54:01,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60916e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:01, skipping insertion in model container [2019-10-13 21:54:01,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:01" (3/3) ... [2019-10-13 21:54:01,392 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label39.c [2019-10-13 21:54:01,401 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:54:01,409 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:54:01,420 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:54:01,447 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:54:01,447 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:54:01,448 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:54:01,448 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:54:01,448 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:54:01,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:54:01,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:54:01,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:54:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:54:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:54:01,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:01,478 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:01,480 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash 863565375, now seen corresponding path program 1 times [2019-10-13 21:54:01,495 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:01,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663272299] [2019-10-13 21:54:01,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:01,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:01,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:01,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663272299] [2019-10-13 21:54:01,708 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:01,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:54:01,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97533282] [2019-10-13 21:54:01,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:54:01,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:54:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:54:01,730 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-13 21:54:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:04,063 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-13 21:54:04,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:54:04,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-13 21:54:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:04,107 INFO L225 Difference]: With dead ends: 953 [2019-10-13 21:54:04,108 INFO L226 Difference]: Without dead ends: 702 [2019-10-13 21:54:04,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:54:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-13 21:54:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 463. [2019-10-13 21:54:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-13 21:54:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions. [2019-10-13 21:54:04,275 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11 [2019-10-13 21:54:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:04,276 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 876 transitions. [2019-10-13 21:54:04,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:54:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions. [2019-10-13 21:54:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 21:54:04,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:04,279 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:04,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash -164671555, now seen corresponding path program 1 times [2019-10-13 21:54:04,280 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:04,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172035353] [2019-10-13 21:54:04,280 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:04,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:04,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:04,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172035353] [2019-10-13 21:54:04,407 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:04,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:54:04,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824740337] [2019-10-13 21:54:04,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:04,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:04,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:54:04,410 INFO L87 Difference]: Start difference. First operand 463 states and 876 transitions. Second operand 5 states. [2019-10-13 21:54:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:06,396 INFO L93 Difference]: Finished difference Result 1395 states and 2674 transitions. [2019-10-13 21:54:06,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:06,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 21:54:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:06,406 INFO L225 Difference]: With dead ends: 1395 [2019-10-13 21:54:06,406 INFO L226 Difference]: Without dead ends: 937 [2019-10-13 21:54:06,409 INFO L600 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 [2019-10-13 21:54:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-13 21:54:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918. [2019-10-13 21:54:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-10-13 21:54:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions. [2019-10-13 21:54:06,458 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21 [2019-10-13 21:54:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:06,459 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions. [2019-10-13 21:54:06,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions. [2019-10-13 21:54:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 21:54:06,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:06,460 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:06,460 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1768778322, now seen corresponding path program 1 times [2019-10-13 21:54:06,461 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:06,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073718080] [2019-10-13 21:54:06,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:06,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:06,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:06,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073718080] [2019-10-13 21:54:06,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:06,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:54:06,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794540841] [2019-10-13 21:54:06,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:54:06,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:54:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:54:06,586 INFO L87 Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand 6 states. [2019-10-13 21:54:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:08,711 INFO L93 Difference]: Finished difference Result 2531 states and 4571 transitions. [2019-10-13 21:54:08,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:08,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-13 21:54:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:08,724 INFO L225 Difference]: With dead ends: 2531 [2019-10-13 21:54:08,732 INFO L226 Difference]: Without dead ends: 1618 [2019-10-13 21:54:08,736 INFO L600 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 [2019-10-13 21:54:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2019-10-13 21:54:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1594. [2019-10-13 21:54:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2019-10-13 21:54:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2777 transitions. [2019-10-13 21:54:08,794 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2777 transitions. Word has length 24 [2019-10-13 21:54:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:08,794 INFO L462 AbstractCegarLoop]: Abstraction has 1594 states and 2777 transitions. [2019-10-13 21:54:08,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:54:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2777 transitions. [2019-10-13 21:54:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 21:54:08,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:08,805 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-13 21:54:08,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -514475001, now seen corresponding path program 1 times [2019-10-13 21:54:08,806 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:08,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87512085] [2019-10-13 21:54:08,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:08,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:08,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:08,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87512085] [2019-10-13 21:54:08,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297452917] [2019-10-13 21:54:08,982 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 [2019-10-13 21:54:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:09,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:09,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:09,151 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:09,218 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:09,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:09,219 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833895056] [2019-10-13 21:54:09,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:09,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:09,220 INFO L87 Difference]: Start difference. First operand 1594 states and 2777 transitions. Second operand 5 states. [2019-10-13 21:54:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:12,874 INFO L93 Difference]: Finished difference Result 4353 states and 7665 transitions. [2019-10-13 21:54:12,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:12,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-13 21:54:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:12,891 INFO L225 Difference]: With dead ends: 4353 [2019-10-13 21:54:12,891 INFO L226 Difference]: Without dead ends: 2764 [2019-10-13 21:54:12,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2019-10-13 21:54:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2731. [2019-10-13 21:54:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2731 states. [2019-10-13 21:54:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4281 transitions. [2019-10-13 21:54:12,976 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4281 transitions. Word has length 57 [2019-10-13 21:54:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:12,977 INFO L462 AbstractCegarLoop]: Abstraction has 2731 states and 4281 transitions. [2019-10-13 21:54:12,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4281 transitions. [2019-10-13 21:54:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 21:54:12,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:12,980 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 21:54:13,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:13,192 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1467679799, now seen corresponding path program 1 times [2019-10-13 21:54:13,192 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:13,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855274990] [2019-10-13 21:54:13,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:13,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:13,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:54:13,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855274990] [2019-10-13 21:54:13,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806397459] [2019-10-13 21:54:13,344 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 [2019-10-13 21:54:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:13,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:13,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:54:13,486 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:54:13,568 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:13,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 21:54:13,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52761060] [2019-10-13 21:54:13,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:13,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:54:13,571 INFO L87 Difference]: Start difference. First operand 2731 states and 4281 transitions. Second operand 5 states. [2019-10-13 21:54:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:16,831 INFO L93 Difference]: Finished difference Result 6180 states and 9828 transitions. [2019-10-13 21:54:16,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:54:16,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2019-10-13 21:54:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:16,850 INFO L225 Difference]: With dead ends: 6180 [2019-10-13 21:54:16,851 INFO L226 Difference]: Without dead ends: 3454 [2019-10-13 21:54:16,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:54:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2019-10-13 21:54:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3356. [2019-10-13 21:54:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3356 states. [2019-10-13 21:54:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 4811 transitions. [2019-10-13 21:54:16,953 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 4811 transitions. Word has length 81 [2019-10-13 21:54:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:16,953 INFO L462 AbstractCegarLoop]: Abstraction has 3356 states and 4811 transitions. [2019-10-13 21:54:16,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 4811 transitions. [2019-10-13 21:54:16,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:54:16,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:16,955 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:17,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:17,160 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1691545083, now seen corresponding path program 1 times [2019-10-13 21:54:17,162 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:17,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654395348] [2019-10-13 21:54:17,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:17,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:17,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 21:54:17,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654395348] [2019-10-13 21:54:17,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983889465] [2019-10-13 21:54:17,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:17,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:54:17,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:54:17,626 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 21:54:17,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490108156] [2019-10-13 21:54:17,783 INFO L162 IcfgInterpreter]: Started Sifa with 40 locations of interest [2019-10-13 21:54:17,783 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:54:17,788 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:54:17,794 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:54:17,795 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:54:17,938 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-13 21:54:18,030 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-13 21:54:18,332 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-13 21:54:18,534 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-10-13 21:54:18,576 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-10-13 21:54:18,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:18,869 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:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) 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:102) 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:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:54:18,876 INFO L168 Benchmark]: Toolchain (without parser) took 27296.66 ms. Allocated memory was 148.9 MB in the beginning and 495.5 MB in the end (delta: 346.6 MB). Free memory was 102.3 MB in the beginning and 146.0 MB in the end (delta: -43.7 MB). Peak memory consumption was 302.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,877 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1364.13 ms. Allocated memory was 148.9 MB in the beginning and 207.6 MB in the end (delta: 58.7 MB). Free memory was 102.1 MB in the beginning and 130.9 MB in the end (delta: -28.8 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,881 INFO L168 Benchmark]: Boogie Preprocessor took 181.20 ms. Allocated memory is still 207.6 MB. Free memory was 130.3 MB in the beginning and 120.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,884 INFO L168 Benchmark]: RCFGBuilder took 8257.23 ms. Allocated memory was 207.6 MB in the beginning and 329.8 MB in the end (delta: 122.2 MB). Free memory was 120.0 MB in the beginning and 243.0 MB in the end (delta: -123.0 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,885 INFO L168 Benchmark]: TraceAbstraction took 17489.80 ms. Allocated memory was 329.8 MB in the beginning and 495.5 MB in the end (delta: 165.7 MB). Free memory was 242.9 MB in the beginning and 146.0 MB in the end (delta: 96.9 MB). Peak memory consumption was 262.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:18,895 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1364.13 ms. Allocated memory was 148.9 MB in the beginning and 207.6 MB in the end (delta: 58.7 MB). Free memory was 102.1 MB in the beginning and 130.9 MB in the end (delta: -28.8 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 181.20 ms. Allocated memory is still 207.6 MB. Free memory was 130.3 MB in the beginning and 120.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8257.23 ms. Allocated memory was 207.6 MB in the beginning and 329.8 MB in the end (delta: 122.2 MB). Free memory was 120.0 MB in the beginning and 243.0 MB in the end (delta: -123.0 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17489.80 ms. Allocated memory was 329.8 MB in the beginning and 495.5 MB in the end (delta: 165.7 MB). Free memory was 242.9 MB in the beginning and 146.0 MB in the end (delta: 96.9 MB). Peak memory consumption was 262.6 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:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...