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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/nla-digbench/egcd2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:29,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:29,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:29,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:29,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:29,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:29,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:29,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:29,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:29,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:29,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:29,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:29,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:29,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:29,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:29,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:29,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:29,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:29,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:29,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:29,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:29,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:29,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:29,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:29,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:06:29,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:06:29,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:06:29,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:06:29,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:06:29,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:06:29,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:06:29,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:06:29,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:06:29,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:06:29,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:06:29,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:06:29,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:06:29,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:06:29,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:29,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:29,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:29,401 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 01:06:29,415 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:29,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:29,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:29,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:29,416 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:29,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:29,417 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:29,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:29,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:29,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:29,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:29,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:29,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:29,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:29,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:29,419 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:29,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:29,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:29,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:29,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:29,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:29,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:29,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:29,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:29,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:29,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:29,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:29,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:29,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:29,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:29,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:29,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:29,744 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:29,745 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:29,745 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-15 01:06:29,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1165d43a3/4a28d5a25bd548a097163b3884c9dabf/FLAGea7360906 [2019-10-15 01:06:30,259 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:30,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-15 01:06:30,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1165d43a3/4a28d5a25bd548a097163b3884c9dabf/FLAGea7360906 [2019-10-15 01:06:30,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1165d43a3/4a28d5a25bd548a097163b3884c9dabf [2019-10-15 01:06:30,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:30,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:30,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:30,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:30,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:30,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:30,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5d6786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30, skipping insertion in model container [2019-10-15 01:06:30,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:30,687 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:30,706 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:30,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:30,934 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:30,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:30,970 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:30,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30 WrapperNode [2019-10-15 01:06:30,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:30,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:30,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:30,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:31,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (1/1) ... [2019-10-15 01:06:31,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:31,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:31,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:31,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:31,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (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 01:06:31,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:31,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:31,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:31,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:06:31,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:31,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:31,377 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:06:31,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:31 BoogieIcfgContainer [2019-10-15 01:06:31,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:31,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:31,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:31,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:31,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:30" (1/3) ... [2019-10-15 01:06:31,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:31, skipping insertion in model container [2019-10-15 01:06:31,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:30" (2/3) ... [2019-10-15 01:06:31,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:31, skipping insertion in model container [2019-10-15 01:06:31,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:31" (3/3) ... [2019-10-15 01:06:31,402 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd2.c [2019-10-15 01:06:31,417 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:31,426 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:31,438 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:31,476 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:31,476 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:31,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:31,477 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:31,477 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:31,477 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:31,477 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:31,477 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-15 01:06:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:31,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:31,509 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:31,511 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash -558324168, now seen corresponding path program 1 times [2019-10-15 01:06:31,523 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:31,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243674144] [2019-10-15 01:06:31,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:31,633 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 01:06:31,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243674144] [2019-10-15 01:06:31,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:31,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:31,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411174380] [2019-10-15 01:06:31,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:31,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:31,654 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-15 01:06:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:31,681 INFO L93 Difference]: Finished difference Result 49 states and 77 transitions. [2019-10-15 01:06:31,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:31,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:06:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:31,693 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:06:31,693 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:06:31,697 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 01:06:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:06:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:06:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:06:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 01:06:31,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-10-15 01:06:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:31,739 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 01:06:31,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 01:06:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:06:31,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:31,741 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:31,741 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1008536757, now seen corresponding path program 1 times [2019-10-15 01:06:31,742 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:31,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409436506] [2019-10-15 01:06:31,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:31,755 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:31,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592713646] [2019-10-15 01:06:31,757 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 01:06:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:31,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:06:31,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:31,883 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 01:06:31,883 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:31,913 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 01:06:31,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409436506] [2019-10-15 01:06:31,915 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:31,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592713646] [2019-10-15 01:06:31,916 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:31,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-10-15 01:06:31,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446907228] [2019-10-15 01:06:31,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:06:31,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:06:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:06:31,920 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 3 states. [2019-10-15 01:06:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:31,982 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-15 01:06:31,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:06:31,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:06:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:31,984 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:06:31,984 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:06:31,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 1 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 01:06:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:06:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-10-15 01:06:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:06:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-15 01:06:31,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2019-10-15 01:06:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:31,998 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-15 01:06:31,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:06:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-15 01:06:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:06:31,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:31,999 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:32,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:32,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1182801044, now seen corresponding path program 1 times [2019-10-15 01:06:32,212 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:32,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94914930] [2019-10-15 01:06:32,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:32,229 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:32,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315024885] [2019-10-15 01:06:32,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:32,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:06:32,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:32,310 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 01:06:32,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:32,350 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 01:06:32,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94914930] [2019-10-15 01:06:32,351 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:32,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315024885] [2019-10-15 01:06:32,352 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:32,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-15 01:06:32,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518132486] [2019-10-15 01:06:32,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:06:32,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:06:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:06:32,354 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 7 states. [2019-10-15 01:06:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:32,461 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2019-10-15 01:06:32,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:32,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-15 01:06:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:32,462 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:06:32,462 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:06:32,463 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:06:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-15 01:06:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:06:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-15 01:06:32,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2019-10-15 01:06:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:32,472 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-15 01:06:32,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:06:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-15 01:06:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:06:32,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:32,473 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:32,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:32,680 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2031293851, now seen corresponding path program 1 times [2019-10-15 01:06:32,681 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:32,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025815302] [2019-10-15 01:06:32,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:32,695 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:32,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437601545] [2019-10-15 01:06:32,699 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 [2019-10-15 01:06:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:32,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:06:32,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:32,797 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:32,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025815302] [2019-10-15 01:06:32,859 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:32,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437601545] [2019-10-15 01:06:32,859 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:32,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 01:06:32,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203509214] [2019-10-15 01:06:32,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:32,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:32,862 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2019-10-15 01:06:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:32,952 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-15 01:06:32,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:32,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-15 01:06:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:32,957 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:06:32,958 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:06:32,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:06:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-15 01:06:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:06:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-15 01:06:32,969 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2019-10-15 01:06:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:32,969 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-15 01:06:32,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-15 01:06:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:06:32,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:32,970 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:33,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:33,174 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash -71864628, now seen corresponding path program 1 times [2019-10-15 01:06:33,174 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:33,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410032713] [2019-10-15 01:06:33,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:33,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:33,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:33,184 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:33,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611833577] [2019-10-15 01:06:33,185 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 [2019-10-15 01:06:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:33,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:06:33,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:06:33,257 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:06:33,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410032713] [2019-10-15 01:06:33,300 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:33,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611833577] [2019-10-15 01:06:33,301 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:33,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 01:06:33,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678838311] [2019-10-15 01:06:33,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:33,302 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:33,302 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2019-10-15 01:06:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:33,411 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-10-15 01:06:33,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:33,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-10-15 01:06:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:33,414 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:06:33,414 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:06:33,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:06:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-15 01:06:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:06:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-15 01:06:33,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 22 [2019-10-15 01:06:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:33,426 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-15 01:06:33,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-15 01:06:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:06:33,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:33,428 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:33,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:33,632 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash 954332139, now seen corresponding path program 1 times [2019-10-15 01:06:33,633 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:33,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050872972] [2019-10-15 01:06:33,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:33,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:33,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:33,640 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:33,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949259516] [2019-10-15 01:06:33,641 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 [2019-10-15 01:06:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:33,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:06:33,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:06:33,746 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:06:33,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050872972] [2019-10-15 01:06:33,810 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:33,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949259516] [2019-10-15 01:06:33,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [263607070] [2019-10-15 01:06:33,830 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 35 [2019-10-15 01:06:33,889 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:33,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:34,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:34,114 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Performed 55 root evaluator evaluations with a maximum evaluation depth of 8. Performed 55 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 12 variables. [2019-10-15 01:06:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:34,120 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:34,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:34,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-10-15 01:06:34,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547312445] [2019-10-15 01:06:34,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:06:34,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:06:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:34,123 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 9 states. [2019-10-15 01:06:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:34,357 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2019-10-15 01:06:34,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:06:34,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-10-15 01:06:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:34,362 INFO L225 Difference]: With dead ends: 74 [2019-10-15 01:06:34,362 INFO L226 Difference]: Without dead ends: 72 [2019-10-15 01:06:34,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:06:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-15 01:06:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2019-10-15 01:06:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:06:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-10-15 01:06:34,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 34 [2019-10-15 01:06:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:34,379 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-10-15 01:06:34,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:06:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-10-15 01:06:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:06:34,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:34,380 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:34,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:34,585 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 286726549, now seen corresponding path program 1 times [2019-10-15 01:06:34,585 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:34,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196700382] [2019-10-15 01:06:34,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:34,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:34,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:34,593 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:34,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091331057] [2019-10-15 01:06:34,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:06:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:34,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:06:34,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:06:34,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:06:34,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196700382] [2019-10-15 01:06:34,706 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:34,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091331057] [2019-10-15 01:06:34,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [128763807] [2019-10-15 01:06:34,707 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 37 [2019-10-15 01:06:34,709 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:34,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:34,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:34,746 INFO L272 AbstractInterpreter]: Visited 17 different actions 22 times. Never merged. Never widened. Performed 61 root evaluator evaluations with a maximum evaluation depth of 8. Performed 61 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 13 variables. [2019-10-15 01:06:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:34,747 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:34,747 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:34,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-10-15 01:06:34,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950661715] [2019-10-15 01:06:34,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:34,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:34,749 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2019-10-15 01:06:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:34,891 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2019-10-15 01:06:34,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:34,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-15 01:06:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:34,896 INFO L225 Difference]: With dead ends: 89 [2019-10-15 01:06:34,897 INFO L226 Difference]: Without dead ends: 81 [2019-10-15 01:06:34,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-15 01:06:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-15 01:06:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:06:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2019-10-15 01:06:34,926 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 36 [2019-10-15 01:06:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:34,926 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2019-10-15 01:06:34,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2019-10-15 01:06:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:06:34,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:34,928 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:35,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,136 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1803964113, now seen corresponding path program 1 times [2019-10-15 01:06:35,137 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:35,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927807632] [2019-10-15 01:06:35,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:35,145 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:35,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973852898] [2019-10-15 01:06:35,145 INFO L94 rtionOrderModulation]: Keeping assertion order 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 01:06:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:35,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:06:35,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:06:35,240 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:06:35,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927807632] [2019-10-15 01:06:35,306 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:35,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973852898] [2019-10-15 01:06:35,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [410667095] [2019-10-15 01:06:35,306 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 43 [2019-10-15 01:06:35,308 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:35,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:35,333 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:35,333 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Performed 55 root evaluator evaluations with a maximum evaluation depth of 8. Performed 55 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 13 variables. [2019-10-15 01:06:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:35,334 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:35,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:35,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-15 01:06:35,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124912533] [2019-10-15 01:06:35,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:06:35,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:35,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:06:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:06:35,336 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 10 states. [2019-10-15 01:06:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:35,498 INFO L93 Difference]: Finished difference Result 113 states and 163 transitions. [2019-10-15 01:06:35,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:35,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-10-15 01:06:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:35,501 INFO L225 Difference]: With dead ends: 113 [2019-10-15 01:06:35,501 INFO L226 Difference]: Without dead ends: 110 [2019-10-15 01:06:35,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:06:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-15 01:06:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2019-10-15 01:06:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-15 01:06:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 156 transitions. [2019-10-15 01:06:35,539 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 156 transitions. Word has length 42 [2019-10-15 01:06:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:35,539 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 156 transitions. [2019-10-15 01:06:35,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:06:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 156 transitions. [2019-10-15 01:06:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 01:06:35,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:35,542 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:35,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,753 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1108781502, now seen corresponding path program 2 times [2019-10-15 01:06:35,753 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:35,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461704513] [2019-10-15 01:06:35,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,754 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:35,761 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:35,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404107318] [2019-10-15 01:06:35,761 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:06:35,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:35,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:06:35,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:06:35,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:06:36,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461704513] [2019-10-15 01:06:36,095 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:36,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404107318] [2019-10-15 01:06:36,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [270387903] [2019-10-15 01:06:36,096 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:06:36,096 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:06:36,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:36,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-15 01:06:36,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542942880] [2019-10-15 01:06:36,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:06:36,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:06:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:06:36,099 INFO L87 Difference]: Start difference. First operand 107 states and 156 transitions. Second operand 12 states. [2019-10-15 01:06:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:36,690 INFO L93 Difference]: Finished difference Result 168 states and 247 transitions. [2019-10-15 01:06:36,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:06:36,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-10-15 01:06:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:36,693 INFO L225 Difference]: With dead ends: 168 [2019-10-15 01:06:36,693 INFO L226 Difference]: Without dead ends: 165 [2019-10-15 01:06:36,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:06:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-15 01:06:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2019-10-15 01:06:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-15 01:06:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2019-10-15 01:06:36,727 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 47 [2019-10-15 01:06:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:36,728 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2019-10-15 01:06:36,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:06:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2019-10-15 01:06:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:06:36,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:36,729 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:36,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:36,943 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1556128492, now seen corresponding path program 1 times [2019-10-15 01:06:36,943 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:36,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934611970] [2019-10-15 01:06:36,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:36,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:36,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:36,955 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:36,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916184653] [2019-10-15 01:06:36,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:37,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-15 01:06:37,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:06:37,173 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:06:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934611970] [2019-10-15 01:06:37,373 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916184653] [2019-10-15 01:06:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [917456889] [2019-10-15 01:06:37,374 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 59 [2019-10-15 01:06:37,376 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:37,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:37,398 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:37,398 INFO L272 AbstractInterpreter]: Visited 17 different actions 22 times. Never merged. Never widened. Performed 61 root evaluator evaluations with a maximum evaluation depth of 8. Performed 61 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 13 variables. [2019-10-15 01:06:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:37,399 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:37,399 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:37,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-15 01:06:37,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728947643] [2019-10-15 01:06:37,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:06:37,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:06:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:06:37,401 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 16 states. [2019-10-15 01:06:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:42,738 INFO L93 Difference]: Finished difference Result 284 states and 434 transitions. [2019-10-15 01:06:42,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:06:42,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2019-10-15 01:06:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:42,743 INFO L225 Difference]: With dead ends: 284 [2019-10-15 01:06:42,743 INFO L226 Difference]: Without dead ends: 280 [2019-10-15 01:06:42,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:06:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-15 01:06:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2019-10-15 01:06:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-10-15 01:06:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 423 transitions. [2019-10-15 01:06:42,822 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 423 transitions. Word has length 58 [2019-10-15 01:06:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:42,822 INFO L462 AbstractCegarLoop]: Abstraction has 276 states and 423 transitions. [2019-10-15 01:06:42,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:06:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 423 transitions. [2019-10-15 01:06:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 01:06:42,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:42,833 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:43,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:43,038 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash 419798924, now seen corresponding path program 3 times [2019-10-15 01:06:43,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:43,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409262600] [2019-10-15 01:06:43,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:43,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:43,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:43,051 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:43,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776846948] [2019-10-15 01:06:43,051 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:43,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:06:43,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:43,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:06:43,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-15 01:06:43,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-15 01:06:43,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409262600] [2019-10-15 01:06:43,200 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:43,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776846948] [2019-10-15 01:06:43,200 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:43,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 01:06:43,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849811589] [2019-10-15 01:06:43,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:43,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:43,202 INFO L87 Difference]: Start difference. First operand 276 states and 423 transitions. Second operand 8 states. [2019-10-15 01:06:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:43,332 INFO L93 Difference]: Finished difference Result 350 states and 527 transitions. [2019-10-15 01:06:43,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:43,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2019-10-15 01:06:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:43,335 INFO L225 Difference]: With dead ends: 350 [2019-10-15 01:06:43,335 INFO L226 Difference]: Without dead ends: 201 [2019-10-15 01:06:43,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:06:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-10-15 01:06:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2019-10-15 01:06:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-10-15 01:06:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2019-10-15 01:06:43,371 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 72 [2019-10-15 01:06:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:43,371 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2019-10-15 01:06:43,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2019-10-15 01:06:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 01:06:43,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:43,374 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:43,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:43,579 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 135833028, now seen corresponding path program 1 times [2019-10-15 01:06:43,580 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:43,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305105052] [2019-10-15 01:06:43,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:43,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:43,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:43,587 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:43,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425732380] [2019-10-15 01:06:43,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:43,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-15 01:06:43,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-15 01:06:43,799 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-15 01:06:44,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305105052] [2019-10-15 01:06:44,020 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:44,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425732380] [2019-10-15 01:06:44,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2109651249] [2019-10-15 01:06:44,021 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 92 [2019-10-15 01:06:44,024 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:44,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:44,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:44,055 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Performed 55 root evaluator evaluations with a maximum evaluation depth of 8. Performed 55 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 13 variables. [2019-10-15 01:06:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:44,055 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:44,055 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:44,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-15 01:06:44,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094452949] [2019-10-15 01:06:44,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:06:44,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:06:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:06:44,057 INFO L87 Difference]: Start difference. First operand 201 states and 291 transitions. Second operand 16 states. [2019-10-15 01:06:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:44,867 INFO L93 Difference]: Finished difference Result 234 states and 336 transitions. [2019-10-15 01:06:44,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:06:44,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2019-10-15 01:06:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:44,875 INFO L225 Difference]: With dead ends: 234 [2019-10-15 01:06:44,875 INFO L226 Difference]: Without dead ends: 224 [2019-10-15 01:06:44,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:06:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-10-15 01:06:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2019-10-15 01:06:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-10-15 01:06:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 286 transitions. [2019-10-15 01:06:44,924 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 286 transitions. Word has length 91 [2019-10-15 01:06:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:44,925 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 286 transitions. [2019-10-15 01:06:44,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:06:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 286 transitions. [2019-10-15 01:06:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:06:44,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:44,928 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:45,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:45,133 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1549930679, now seen corresponding path program 2 times [2019-10-15 01:06:45,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:45,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297720985] [2019-10-15 01:06:45,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:45,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:45,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:45,142 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:45,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175592813] [2019-10-15 01:06:45,142 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:45,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:06:45,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:45,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:06:45,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:45,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 67 proven. 43 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-10-15 01:06:45,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:45,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:45,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:45,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 67 proven. 45 refuted. 2 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-15 01:06:49,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297720985] [2019-10-15 01:06:49,850 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:49,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175592813] [2019-10-15 01:06:49,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1558358141] [2019-10-15 01:06:49,851 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:06:49,851 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:06:49,851 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:49,851 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2019-10-15 01:06:49,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273977567] [2019-10-15 01:06:49,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:06:49,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:06:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=354, Unknown=2, NotChecked=0, Total=420 [2019-10-15 01:06:49,853 INFO L87 Difference]: Start difference. First operand 200 states and 286 transitions. Second operand 21 states. [2019-10-15 01:07:04,237 WARN L191 SmtUtils]: Spent 7.38 s on a formula simplification that was a NOOP. DAG size: 54 [2019-10-15 01:07:15,461 WARN L191 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 47