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/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:27,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:27,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:27,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:27,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:27,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:27,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:27,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:27,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:27,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:27,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:27,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:27,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:27,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:27,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:27,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:27,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:27,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:27,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:27,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:27,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:27,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:27,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:27,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:27,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:06:27,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:06:27,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:06:27,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:06:27,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:06:27,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:06:27,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:06:27,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:06:27,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:06:27,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:06:27,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:06:27,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:06:27,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:06:27,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:06:27,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:27,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:27,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:27,704 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 01:06:27,731 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:27,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:27,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:27,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:27,733 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:27,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:27,733 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:27,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:27,735 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:27,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:27,735 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:27,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:27,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:27,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:27,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:27,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:27,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:27,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:27,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:27,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:27,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:27,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:27,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:27,746 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 01:06:28,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:28,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:28,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:28,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:28,077 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:28,078 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-15 01:06:28,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e7c7f80/cf19ad45d4d442ea8a3b730934f70827/FLAG483fa4043 [2019-10-15 01:06:28,613 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:28,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-10-15 01:06:28,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e7c7f80/cf19ad45d4d442ea8a3b730934f70827/FLAG483fa4043 [2019-10-15 01:06:29,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e7c7f80/cf19ad45d4d442ea8a3b730934f70827 [2019-10-15 01:06:29,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:29,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:29,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:29,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:29,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:29,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29, skipping insertion in model container [2019-10-15 01:06:29,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,055 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:29,076 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:29,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:29,288 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:29,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:29,437 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:29,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29 WrapperNode [2019-10-15 01:06:29,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:29,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:29,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:29,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:29,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (1/1) ... [2019-10-15 01:06:29,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:29,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:29,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:29,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:29,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (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 01:06:29,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:29,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:29,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:29,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:29,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:29,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:29,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:06:29,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:29,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:29,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:29,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:29,775 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:29,775 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:29,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:29 BoogieIcfgContainer [2019-10-15 01:06:29,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:29,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:29,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:29,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:29,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:29" (1/3) ... [2019-10-15 01:06:29,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70314ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:29, skipping insertion in model container [2019-10-15 01:06:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:29" (2/3) ... [2019-10-15 01:06:29,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70314ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:29, skipping insertion in model container [2019-10-15 01:06:29,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:29" (3/3) ... [2019-10-15 01:06:29,784 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-10-15 01:06:29,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:29,798 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:29,807 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:29,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:29,833 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:29,834 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:29,834 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:29,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:29,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:29,835 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:29,835 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-15 01:06:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:29,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:29,865 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:29,866 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-10-15 01:06:29,883 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:29,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222871286] [2019-10-15 01:06:29,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:29,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:29,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:29,976 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 01:06:29,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222871286] [2019-10-15 01:06:29,978 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:29,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:29,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247526075] [2019-10-15 01:06:29,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:29,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:29,997 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-15 01:06:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:30,029 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-10-15 01:06:30,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:30,031 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:06:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:30,041 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:06:30,041 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:06:30,045 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 01:06:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:06:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:06:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:06:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-10-15 01:06:30,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-10-15 01:06:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:30,090 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-10-15 01:06:30,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-10-15 01:06:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:30,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:30,091 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:30,092 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-10-15 01:06:30,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:30,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294178693] [2019-10-15 01:06:30,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:30,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:30,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:30,306 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 01:06:30,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294178693] [2019-10-15 01:06:30,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:30,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:06:30,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632679279] [2019-10-15 01:06:30,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:30,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:30,310 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-10-15 01:06:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:30,456 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-10-15 01:06:30,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:30,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-15 01:06:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:30,459 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:06:30,459 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:06:30,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:06:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:06:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:06:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:06:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-10-15 01:06:30,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-10-15 01:06:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:30,476 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-10-15 01:06:30,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-10-15 01:06:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:06:30,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:30,478 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:30,478 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-10-15 01:06:30,479 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:30,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374791547] [2019-10-15 01:06:30,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:30,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:30,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:30,490 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:30,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414570537] [2019-10-15 01:06:30,491 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 01:06:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:30,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:06:30,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:30,684 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:30,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:30,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:30,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:30,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374791547] [2019-10-15 01:06:30,837 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:30,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414570537] [2019-10-15 01:06:30,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [469760981] [2019-10-15 01:06:30,844 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 16 [2019-10-15 01:06:30,880 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:30,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:30,982 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:30,984 INFO L272 AbstractInterpreter]: Visited 14 different actions 19 times. Never merged. Never widened. Performed 18 root evaluator evaluations with a maximum evaluation depth of 8. Performed 18 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:06:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:30,989 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:30,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:30,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-10-15 01:06:30,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482650517] [2019-10-15 01:06:30,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:06:30,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:06:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:06:30,992 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 12 states. [2019-10-15 01:06:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:31,485 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2019-10-15 01:06:31,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:06:31,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-10-15 01:06:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:31,490 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:06:31,491 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 01:06:31,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:06:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 01:06:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-15 01:06:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 01:06:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-10-15 01:06:31,508 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-10-15 01:06:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:31,509 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-10-15 01:06:31,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:06:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-10-15 01:06:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:06:31,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:31,510 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:31,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:31,717 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-10-15 01:06:31,718 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:31,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981329820] [2019-10-15 01:06:31,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:31,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:31,726 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:31,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854197561] [2019-10-15 01:06:31,727 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 01:06:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:31,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:06:31,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:06:31,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:31,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:31,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:06:31,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981329820] [2019-10-15 01:06:31,922 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:31,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854197561] [2019-10-15 01:06:31,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [51937254] [2019-10-15 01:06:31,924 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 21 [2019-10-15 01:06:31,928 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:31,928 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:32,002 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:32,002 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:06:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:32,003 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:32,003 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:32,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-10-15 01:06:32,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608232916] [2019-10-15 01:06:32,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:06:32,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:06:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:06:32,011 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 12 states. [2019-10-15 01:06:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:32,341 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-15 01:06:32,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:06:32,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-10-15 01:06:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:32,344 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:06:32,344 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 01:06:32,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:06:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 01:06:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-15 01:06:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:06:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-10-15 01:06:32,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-10-15 01:06:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:32,362 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-10-15 01:06:32,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:06:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-10-15 01:06:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:06:32,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:32,364 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:32,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:32,568 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:32,569 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-10-15 01:06:32,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:32,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650186135] [2019-10-15 01:06:32,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:32,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:32,577 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:32,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762316513] [2019-10-15 01:06:32,578 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 01:06:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:32,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:06:32,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:06:32,708 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:32,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:32,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:06:32,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650186135] [2019-10-15 01:06:32,828 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:32,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762316513] [2019-10-15 01:06:32,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1717449495] [2019-10-15 01:06:32,829 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 26 [2019-10-15 01:06:32,831 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:32,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:32,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:32,852 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:06:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:32,853 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:32,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:32,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-10-15 01:06:32,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15604185] [2019-10-15 01:06:32,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:06:32,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:06:32,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:06:32,855 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 12 states. [2019-10-15 01:06:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:33,928 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-15 01:06:33,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:06:33,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-10-15 01:06:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:33,931 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:06:33,931 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 01:06:33,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:06:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 01:06:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-15 01:06:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:06:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2019-10-15 01:06:33,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 25 [2019-10-15 01:06:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:33,946 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2019-10-15 01:06:33,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:06:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2019-10-15 01:06:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 01:06:33,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:33,948 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:34,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:34,152 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 1 times [2019-10-15 01:06:34,154 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:34,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500857888] [2019-10-15 01:06:34,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:34,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:34,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:34,163 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:34,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697560785] [2019-10-15 01:06:34,163 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 01:06:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:34,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-15 01:06:34,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:06:34,284 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:34,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:34,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:34,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:06:34,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500857888] [2019-10-15 01:06:34,430 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:34,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697560785] [2019-10-15 01:06:34,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [172602052] [2019-10-15 01:06:34,431 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 48 [2019-10-15 01:06:34,434 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:34,434 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:34,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:34,452 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:06:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:34,453 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:34,453 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:34,453 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-10-15 01:06:34,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323596473] [2019-10-15 01:06:34,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:06:34,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:06:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:06:34,455 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 14 states. [2019-10-15 01:06:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:34,888 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2019-10-15 01:06:34,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:06:34,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-10-15 01:06:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:34,891 INFO L225 Difference]: With dead ends: 76 [2019-10-15 01:06:34,891 INFO L226 Difference]: Without dead ends: 74 [2019-10-15 01:06:34,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:06:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-15 01:06:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-15 01:06:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-15 01:06:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2019-10-15 01:06:34,905 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 47 [2019-10-15 01:06:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:34,906 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2019-10-15 01:06:34,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:06:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2019-10-15 01:06:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:06:34,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:34,908 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:35,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,120 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 2 times [2019-10-15 01:06:35,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:35,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180730145] [2019-10-15 01:06:35,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:35,133 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:35,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348811517] [2019-10-15 01:06:35,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:06:35,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:35,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:06:35,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-15 01:06:35,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-15 01:06:35,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180730145] [2019-10-15 01:06:35,366 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:35,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348811517] [2019-10-15 01:06:35,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:06:35,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-15 01:06:35,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041253178] [2019-10-15 01:06:35,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:35,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:35,369 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 5 states. [2019-10-15 01:06:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:35,625 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-10-15 01:06:35,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:35,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-15 01:06:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:35,627 INFO L225 Difference]: With dead ends: 83 [2019-10-15 01:06:35,627 INFO L226 Difference]: Without dead ends: 79 [2019-10-15 01:06:35,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:06:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-15 01:06:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-15 01:06:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-15 01:06:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-10-15 01:06:35,642 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 57 [2019-10-15 01:06:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:35,642 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-10-15 01:06:35,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-10-15 01:06:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:06:35,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:35,645 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:35,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:35,848 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-10-15 01:06:35,850 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:35,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727354227] [2019-10-15 01:06:35,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:35,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:35,860 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:35,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774960694] [2019-10-15 01:06:35,860 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 01:06:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:35,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:06:35,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:35,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:06:35,999 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:37,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:37,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:06:38,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727354227] [2019-10-15 01:06:38,108 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:38,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774960694] [2019-10-15 01:06:38,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [583925720] [2019-10-15 01:06:38,109 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 69 [2019-10-15 01:06:38,111 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:38,111 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:38,133 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:38,133 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:06:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:38,134 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:38,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:06:38,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-10-15 01:06:38,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564090129] [2019-10-15 01:06:38,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:06:38,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:06:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:06:38,137 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2019-10-15 01:06:39,016 WARN L191 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-10-15 01:06:39,284 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-10-15 01:06:51,077 WARN L191 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 27 [2019-10-15 01:07:17,131 WARN L191 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-10-15 01:07:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:19,260 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2019-10-15 01:07:19,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:07:19,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-10-15 01:07:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:19,266 INFO L225 Difference]: With dead ends: 85 [2019-10-15 01:07:19,266 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 01:07:19,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=80, Invalid=298, Unknown=2, NotChecked=0, Total=380 [2019-10-15 01:07:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 01:07:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 01:07:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:07:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2019-10-15 01:07:19,298 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2019-10-15 01:07:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:19,299 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2019-10-15 01:07:19,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:07:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2019-10-15 01:07:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 01:07:19,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:19,301 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:19,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:19,502 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-10-15 01:07:19,503 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:19,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395480988] [2019-10-15 01:07:19,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:19,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:19,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:19,511 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:07:19,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733414369] [2019-10-15 01:07:19,511 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 01:07:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:19,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:07:19,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:19,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:07:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-15 01:07:19,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:19,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:07:19,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:07:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-15 01:07:19,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395480988] [2019-10-15 01:07:19,895 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:07:19,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733414369] [2019-10-15 01:07:19,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1895204511] [2019-10-15 01:07:19,896 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 74 [2019-10-15 01:07:19,899 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:07:19,899 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:07:19,921 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:07:19,921 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-10-15 01:07:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:19,922 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:07:19,922 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:19,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-10-15 01:07:19,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124018305] [2019-10-15 01:07:19,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 01:07:19,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 01:07:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:07:19,924 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 15 states.