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/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:02,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:02,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:02,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:02,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:02,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:02,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:02,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:02,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:02,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:02,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:02,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:02,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:02,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:02,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:02,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:02,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:02,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:02,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:02,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:02,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:02,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:02,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:02,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:02,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:02,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:02,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:02,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:02,516 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 [2019-10-15 01:35:02,535 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:02,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:02,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:02,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:02,537 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:02,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:02,538 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:02,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:02,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:02,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:02,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:02,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:02,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:02,539 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:02,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:02,540 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:02,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:02,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:02,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:02,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:02,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:02,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:02,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:02,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:02,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:02,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:02,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:02,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:02,544 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 [2019-10-15 01:35:02,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:02,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:02,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:02,868 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:02,868 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:02,869 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2019-10-15 01:35:02,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02c373b3/c313f45bf8ce48c494074a19d56bfcd8/FLAG65f83cd4d [2019-10-15 01:35:03,383 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:03,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2019-10-15 01:35:03,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02c373b3/c313f45bf8ce48c494074a19d56bfcd8/FLAG65f83cd4d [2019-10-15 01:35:03,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02c373b3/c313f45bf8ce48c494074a19d56bfcd8 [2019-10-15 01:35:03,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:03,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:03,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:03,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:03,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:03,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:03" (1/1) ... [2019-10-15 01:35:03,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:03, skipping insertion in model container [2019-10-15 01:35:03,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:03" (1/1) ... [2019-10-15 01:35:03,817 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:03,837 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:04,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:04,121 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:04,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:04,170 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:04,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04 WrapperNode [2019-10-15 01:35:04,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:04,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:04,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:04,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:04,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:04,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:04,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:04,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:04,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (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 [2019-10-15 01:35:04,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:04,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:04,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:04,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:04,713 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:35:04,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:04 BoogieIcfgContainer [2019-10-15 01:35:04,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:04,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:04,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:04,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:04,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:03" (1/3) ... [2019-10-15 01:35:04,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba043b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:04, skipping insertion in model container [2019-10-15 01:35:04,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (2/3) ... [2019-10-15 01:35:04,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba043b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:04, skipping insertion in model container [2019-10-15 01:35:04,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:04" (3/3) ... [2019-10-15 01:35:04,731 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2019-10-15 01:35:04,751 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:04,769 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:04,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:04,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:04,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:04,806 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:04,806 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:04,806 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:04,806 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:04,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:04,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:35:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:04,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:04,833 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:04,835 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1895073184, now seen corresponding path program 1 times [2019-10-15 01:35:04,847 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:04,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846597410] [2019-10-15 01:35:04,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:04,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:04,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:05,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846597410] [2019-10-15 01:35:05,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:05,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:35:05,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009557115] [2019-10-15 01:35:05,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:35:05,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:35:05,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:35:05,031 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 01:35:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:05,051 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:35:05,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:35:05,052 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-15 01:35:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:05,060 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:35:05,060 INFO L226 Difference]: Without dead ends: 14 [2019-10-15 01:35:05,064 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 [2019-10-15 01:35:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-15 01:35:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-15 01:35:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:35:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-15 01:35:05,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2019-10-15 01:35:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:05,102 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-15 01:35:05,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:35:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-15 01:35:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:05,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,103 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,104 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1607168598, now seen corresponding path program 1 times [2019-10-15 01:35:05,105 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141024198] [2019-10-15 01:35:05,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:05,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141024198] [2019-10-15 01:35:05,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:05,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:05,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492945464] [2019-10-15 01:35:05,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:05,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:05,170 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-10-15 01:35:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:05,188 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-15 01:35:05,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:05,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:05,190 INFO L225 Difference]: With dead ends: 23 [2019-10-15 01:35:05,191 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:35:05,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:35:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:35:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:35:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 01:35:05,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-10-15 01:35:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:05,198 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 01:35:05,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 01:35:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:05,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,199 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,200 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash -710183188, now seen corresponding path program 1 times [2019-10-15 01:35:05,201 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970362335] [2019-10-15 01:35:05,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:05,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970362335] [2019-10-15 01:35:05,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:05,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:35:05,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036843466] [2019-10-15 01:35:05,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:35:05,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:35:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:35:05,302 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-10-15 01:35:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:05,388 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-15 01:35:05,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:35:05,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-10-15 01:35:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:05,392 INFO L225 Difference]: With dead ends: 22 [2019-10-15 01:35:05,392 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:05,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:35:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 01:35:05,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2019-10-15 01:35:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:05,398 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 01:35:05,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:35:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 01:35:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:35:05,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,399 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,400 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1319161073, now seen corresponding path program 1 times [2019-10-15 01:35:05,401 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270125724] [2019-10-15 01:35:05,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:05,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270125724] [2019-10-15 01:35:05,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098194592] [2019-10-15 01:35:05,507 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 [2019-10-15 01:35:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:05,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:05,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:05,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520643737] [2019-10-15 01:35:05,696 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:05,696 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:05,704 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:05,712 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:05,713 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:05,922 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:06,232 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:06,257 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:06,265 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:06,564 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-10-15 01:35:06,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:06,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:35:06,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157088927] [2019-10-15 01:35:06,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:35:06,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:35:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:35:06,759 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2019-10-15 01:35:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:07,203 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:07,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:35:07,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:35:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:07,206 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:07,206 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:35:07,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:35:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:35:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:35:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:35:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-15 01:35:07,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-10-15 01:35:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:07,221 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-15 01:35:07,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:35:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-15 01:35:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:35:07,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:07,223 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:07,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:07,436 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 922897583, now seen corresponding path program 2 times [2019-10-15 01:35:07,437 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:07,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048568929] [2019-10-15 01:35:07,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:07,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:35:07,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048568929] [2019-10-15 01:35:07,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987829284] [2019-10-15 01:35:07,536 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-15 01:35:07,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:35:07,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:07,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:35:07,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:07,765 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:07,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767829787] [2019-10-15 01:35:07,892 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:07,893 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:07,894 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:07,894 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:07,894 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:07,926 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:08,089 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:08,107 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:08,112 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:08,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:08,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 11] total 28 [2019-10-15 01:35:08,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231247649] [2019-10-15 01:35:08,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 01:35:08,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 01:35:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:35:08,524 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 28 states. [2019-10-15 01:35:09,351 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-10-15 01:35:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:09,886 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-10-15 01:35:09,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:35:09,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 19 [2019-10-15 01:35:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:09,888 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:35:09,888 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:35:09,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:35:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:35:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:35:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 01:35:09,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-10-15 01:35:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:09,898 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 01:35:09,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 01:35:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 01:35:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:35:09,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:09,899 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:10,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:10,103 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash -841568069, now seen corresponding path program 3 times [2019-10-15 01:35:10,104 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:10,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571823085] [2019-10-15 01:35:10,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:10,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:10,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:10,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571823085] [2019-10-15 01:35:10,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400680815] [2019-10-15 01:35:10,183 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-15 01:35:10,254 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:10,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:10,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:35:10,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:10,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:10,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520043641] [2019-10-15 01:35:10,373 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:10,374 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:10,374 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:10,374 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:10,374 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:10,424 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:10,610 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:10,632 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:10,643 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:10,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:10,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:35:10,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145623622] [2019-10-15 01:35:10,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:35:10,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:35:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:35:10,999 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 25 states. [2019-10-15 01:35:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:11,643 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-15 01:35:11,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:35:11,643 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2019-10-15 01:35:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:11,644 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:35:11,644 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:35:11,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=1444, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:35:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:35:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:35:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-15 01:35:11,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2019-10-15 01:35:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:11,653 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-15 01:35:11,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:35:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-15 01:35:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:35:11,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:11,654 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:11,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:11,860 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1957294841, now seen corresponding path program 4 times [2019-10-15 01:35:11,860 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:11,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854127071] [2019-10-15 01:35:11,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:11,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:11,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:12,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854127071] [2019-10-15 01:35:12,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790719643] [2019-10-15 01:35:12,081 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-10-15 01:35:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:12,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:35:12,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:12,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:12,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727883602] [2019-10-15 01:35:12,430 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:12,430 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:12,431 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:12,431 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:12,431 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:12,463 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:12,611 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:12,627 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:12,635 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:13,012 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:13,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:35:13,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905747226] [2019-10-15 01:35:13,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:35:13,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:35:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:13,016 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 39 states. [2019-10-15 01:35:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:14,275 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2019-10-15 01:35:14,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:35:14,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 31 [2019-10-15 01:35:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:14,278 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:35:14,278 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:35:14,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1237, Invalid=3733, Unknown=0, NotChecked=0, Total=4970 [2019-10-15 01:35:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:35:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-15 01:35:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:35:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-15 01:35:14,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 31 [2019-10-15 01:35:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:14,289 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-15 01:35:14,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:35:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-15 01:35:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:35:14,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:14,290 INFO L380 BasicCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:14,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:14,499 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1319947449, now seen corresponding path program 5 times [2019-10-15 01:35:14,500 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:14,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92568297] [2019-10-15 01:35:14,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:35:14,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92568297] [2019-10-15 01:35:14,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025458194] [2019-10-15 01:35:14,979 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-15 01:35:15,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:35:15,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:15,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:35:15,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:15,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:16,254 WARN L191 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-10-15 01:35:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:16,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185054308] [2019-10-15 01:35:16,383 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:16,384 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:16,384 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:16,384 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:16,385 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:16,413 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:16,529 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:16,542 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:16,546 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:17,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:17,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12, 11, 11] total 58 [2019-10-15 01:35:17,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232646403] [2019-10-15 01:35:17,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 01:35:17,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 01:35:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=2783, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:35:17,075 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 58 states. [2019-10-15 01:35:19,483 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2019-10-15 01:35:19,674 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-15 01:35:19,953 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-10-15 01:35:20,219 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-10-15 01:35:20,628 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-10-15 01:35:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:21,522 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-10-15 01:35:21,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-15 01:35:21,523 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 45 [2019-10-15 01:35:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:21,524 INFO L225 Difference]: With dead ends: 75 [2019-10-15 01:35:21,525 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:35:21,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1729, Invalid=9613, Unknown=0, NotChecked=0, Total=11342 [2019-10-15 01:35:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:35:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-15 01:35:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-15 01:35:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-10-15 01:35:21,538 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 45 [2019-10-15 01:35:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:21,538 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-10-15 01:35:21,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 01:35:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-10-15 01:35:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:35:21,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:21,540 INFO L380 BasicCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:21,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:21,752 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 191084431, now seen corresponding path program 6 times [2019-10-15 01:35:21,753 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:21,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734153053] [2019-10-15 01:35:21,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:21,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:21,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:22,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734153053] [2019-10-15 01:35:22,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967249936] [2019-10-15 01:35:22,268 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:22,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:22,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:22,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:35:22,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:22,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:23,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457969263] [2019-10-15 01:35:23,296 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:23,296 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:23,297 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:23,297 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:23,297 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:23,341 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:23,442 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:23,453 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:23,456 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:23,851 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:23,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:35:23,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807129073] [2019-10-15 01:35:23,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:35:23,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:35:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:35:23,855 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 69 states. [2019-10-15 01:35:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:26,872 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2019-10-15 01:35:26,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-15 01:35:26,872 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 54 [2019-10-15 01:35:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:26,873 INFO L225 Difference]: With dead ends: 106 [2019-10-15 01:35:26,873 INFO L226 Difference]: Without dead ends: 84 [2019-10-15 01:35:26,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5092, Invalid=11938, Unknown=0, NotChecked=0, Total=17030 [2019-10-15 01:35:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-15 01:35:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-15 01:35:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-15 01:35:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-10-15 01:35:26,888 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 54 [2019-10-15 01:35:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:26,889 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-10-15 01:35:26,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:35:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-10-15 01:35:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-15 01:35:26,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:26,892 INFO L380 BasicCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:27,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:27,096 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:27,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1550959629, now seen corresponding path program 7 times [2019-10-15 01:35:27,097 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:27,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853250520] [2019-10-15 01:35:27,098 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:27,098 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:27,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:28,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853250520] [2019-10-15 01:35:28,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673945947] [2019-10-15 01:35:28,482 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:28,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:35:28,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:28,650 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:32,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175807138] [2019-10-15 01:35:32,198 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:32,199 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:32,199 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:32,199 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:32,199 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:32,227 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:32,307 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:32,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:32,319 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:32,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:32,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 11] total 127 [2019-10-15 01:35:32,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377778115] [2019-10-15 01:35:32,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-10-15 01:35:32,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:32,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-10-15 01:35:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6815, Invalid=9187, Unknown=0, NotChecked=0, Total=16002 [2019-10-15 01:35:32,907 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 127 states. [2019-10-15 01:35:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:42,388 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2019-10-15 01:35:42,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2019-10-15 01:35:42,389 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 83 [2019-10-15 01:35:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:42,391 INFO L225 Difference]: With dead ends: 164 [2019-10-15 01:35:42,392 INFO L226 Difference]: Without dead ends: 142 [2019-10-15 01:35:42,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11548 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=20201, Invalid=40561, Unknown=0, NotChecked=0, Total=60762 [2019-10-15 01:35:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-10-15 01:35:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-10-15 01:35:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-15 01:35:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2019-10-15 01:35:42,418 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 83 [2019-10-15 01:35:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:42,419 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2019-10-15 01:35:42,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-10-15 01:35:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2019-10-15 01:35:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 01:35:42,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:42,424 INFO L380 BasicCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:42,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:42,625 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2110620493, now seen corresponding path program 8 times [2019-10-15 01:35:42,626 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:42,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741398793] [2019-10-15 01:35:42,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat