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/nla-digbench/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:00:41,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:41,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:41,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:41,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:41,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:41,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:41,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:41,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:41,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:41,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:41,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:41,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:41,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:41,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:41,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:41,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:41,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:41,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:41,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:41,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:41,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:41,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:41,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:41,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:41,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:00:41,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:00:41,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:00:41,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:00:41,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:00:41,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:00:41,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:00:41,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:00:41,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:41,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:41,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:41,474 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 23:00:41,487 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:41,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:41,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:41,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:41,489 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:41,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:41,490 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:41,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:41,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:41,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:41,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:41,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:41,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:41,491 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:41,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:41,492 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:41,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:41,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:41,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:41,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:41,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:41,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:41,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:41,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:41,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:41,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:41,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:41,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:41,494 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 23:00:41,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:41,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:41,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:41,780 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:41,781 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:41,782 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2019-10-13 23:00:41,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e622044c/09c239bf8ca54ae6a31f28cf26b47831/FLAGea7424dcc [2019-10-13 23:00:42,304 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:42,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2019-10-13 23:00:42,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e622044c/09c239bf8ca54ae6a31f28cf26b47831/FLAGea7424dcc [2019-10-13 23:00:42,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e622044c/09c239bf8ca54ae6a31f28cf26b47831 [2019-10-13 23:00:42,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:42,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:42,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:42,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:42,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:42,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:42,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6226574d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42, skipping insertion in model container [2019-10-13 23:00:42,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:42,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:42,741 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:42,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:42,950 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:42,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:42,985 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:42,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42 WrapperNode [2019-10-13 23:00:42,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:42,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:42,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:42,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:43,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (1/1) ... [2019-10-13 23:00:43,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:43,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:43,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:43,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:43,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (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 23:00:43,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:43,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:43,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:43,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:43,408 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:43,409 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 23:00:43,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:43 BoogieIcfgContainer [2019-10-13 23:00:43,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:43,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:43,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:43,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:43,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:42" (1/3) ... [2019-10-13 23:00:43,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7910bac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:43, skipping insertion in model container [2019-10-13 23:00:43,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:42" (2/3) ... [2019-10-13 23:00:43,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7910bac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:43, skipping insertion in model container [2019-10-13 23:00:43,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:43" (3/3) ... [2019-10-13 23:00:43,434 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm1.c [2019-10-13 23:00:43,447 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:43,456 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:43,485 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:43,517 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:43,518 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:43,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:43,518 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:43,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:43,518 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:43,518 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:43,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-13 23:00:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:43,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:43,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:43,541 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash -801078501, now seen corresponding path program 1 times [2019-10-13 23:00:43,553 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:43,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010778210] [2019-10-13 23:00:43,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:43,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:43,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:43,663 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 23:00:43,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010778210] [2019-10-13 23:00:43,665 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:43,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:43,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686044326] [2019-10-13 23:00:43,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:43,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:43,682 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-10-13 23:00:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:43,709 INFO L93 Difference]: Finished difference Result 47 states and 72 transitions. [2019-10-13 23:00:43,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:43,711 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 23:00:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:43,721 INFO L225 Difference]: With dead ends: 47 [2019-10-13 23:00:43,721 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 23:00:43,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 23:00:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 23:00:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 23:00:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-13 23:00:43,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-10-13 23:00:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:43,773 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-13 23:00:43,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-13 23:00:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:43,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:43,775 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:43,775 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:43,776 INFO L82 PathProgramCache]: Analyzing trace with hash -871444843, now seen corresponding path program 1 times [2019-10-13 23:00:43,776 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:43,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230492778] [2019-10-13 23:00:43,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:43,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:43,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:43,788 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:43,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495235311] [2019-10-13 23:00:43,789 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 23:00:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:43,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:00:43,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:43,945 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 23:00:43,945 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:44,011 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 23:00:44,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230492778] [2019-10-13 23:00:44,012 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:44,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495235311] [2019-10-13 23:00:44,013 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:44,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 23:00:44,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680968846] [2019-10-13 23:00:44,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:44,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:44,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:44,017 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2019-10-13 23:00:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:44,229 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-13 23:00:44,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:44,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-13 23:00:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:44,232 INFO L225 Difference]: With dead ends: 39 [2019-10-13 23:00:44,232 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 23:00:44,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 23:00:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-13 23:00:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 23:00:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-10-13 23:00:44,258 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 10 [2019-10-13 23:00:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:44,258 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-10-13 23:00:44,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-10-13 23:00:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 23:00:44,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:44,261 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:44,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:44,471 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1387131099, now seen corresponding path program 1 times [2019-10-13 23:00:44,471 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:44,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113462811] [2019-10-13 23:00:44,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:44,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:44,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:44,485 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:44,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723728368] [2019-10-13 23:00:44,486 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) [2019-10-13 23:00:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:44,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 23:00:44,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:44,597 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:44,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113462811] [2019-10-13 23:00:44,698 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:44,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723728368] [2019-10-13 23:00:44,698 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:44,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-10-13 23:00:44,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147328584] [2019-10-13 23:00:44,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:00:44,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:00:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:00:44,702 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 10 states. [2019-10-13 23:00:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:44,965 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2019-10-13 23:00:44,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:00:44,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-13 23:00:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:44,968 INFO L225 Difference]: With dead ends: 73 [2019-10-13 23:00:44,968 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 23:00:44,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:00:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 23:00:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-13 23:00:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-13 23:00:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2019-10-13 23:00:44,986 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 16 [2019-10-13 23:00:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:44,987 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2019-10-13 23:00:44,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:00:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2019-10-13 23:00:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 23:00:44,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:44,988 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:45,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:45,192 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1615934296, now seen corresponding path program 1 times [2019-10-13 23:00:45,193 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:45,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495287048] [2019-10-13 23:00:45,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:45,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:45,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:45,201 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:45,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99153065] [2019-10-13 23:00:45,201 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 23:00:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:45,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:00:45,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:45,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:45,325 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:00:45,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495287048] [2019-10-13 23:00:45,395 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:45,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99153065] [2019-10-13 23:00:45,395 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:00:45,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 23:00:45,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295092495] [2019-10-13 23:00:45,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:00:45,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:45,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:00:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:45,397 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand 5 states. [2019-10-13 23:00:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:45,466 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2019-10-13 23:00:45,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:45,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 23:00:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:45,470 INFO L225 Difference]: With dead ends: 74 [2019-10-13 23:00:45,470 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 23:00:45,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:00:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 23:00:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-13 23:00:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 23:00:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2019-10-13 23:00:45,487 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 24 [2019-10-13 23:00:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:45,488 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2019-10-13 23:00:45,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:00:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2019-10-13 23:00:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 23:00:45,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:45,491 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:45,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:45,698 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1558903376, now seen corresponding path program 1 times [2019-10-13 23:00:45,700 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:45,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586346716] [2019-10-13 23:00:45,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:45,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:45,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:45,727 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:45,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454932117] [2019-10-13 23:00:45,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:45,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:00:45,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:45,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 23:00:45,814 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 23:00:45,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586346716] [2019-10-13 23:00:45,859 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:45,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454932117] [2019-10-13 23:00:45,859 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:45,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-10-13 23:00:45,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949375492] [2019-10-13 23:00:45,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:45,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:45,861 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand 8 states. [2019-10-13 23:00:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:45,976 INFO L93 Difference]: Finished difference Result 170 states and 234 transitions. [2019-10-13 23:00:45,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:00:45,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-10-13 23:00:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:45,979 INFO L225 Difference]: With dead ends: 170 [2019-10-13 23:00:45,979 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 23:00:45,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 23:00:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-13 23:00:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 23:00:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2019-10-13 23:00:45,996 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 49 [2019-10-13 23:00:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:45,997 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2019-10-13 23:00:45,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2019-10-13 23:00:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 23:00:45,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:46,000 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:46,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:46,211 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash -250356680, now seen corresponding path program 1 times [2019-10-13 23:00:46,212 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:46,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559129446] [2019-10-13 23:00:46,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:46,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:46,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:46,224 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:46,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339592756] [2019-10-13 23:00:46,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:46,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 23:00:46,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:46,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 23:00:46,458 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 23:00:46,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559129446] [2019-10-13 23:00:46,703 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:46,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339592756] [2019-10-13 23:00:46,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202227357] [2019-10-13 23:00:46,733 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-13 23:00:46,733 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:00:46,740 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:00:46,752 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:00:46,753 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:00:46,822 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:00:47,948 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:00:50,061 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:00:52,885 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:00:54,967 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:00:57,686 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:00:59,797 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:01:02,409 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-13 23:01:04,490 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-10-13 23:01:11,085 WARN L191 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-13 23:01:13,168 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-13 23:01:15,706 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-13 23:01:17,830 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-10-13 23:01:20,322 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-10-13 23:01:24,885 WARN L191 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-10-13 23:01:26,968 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 27 DAG size of output: 19