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 -i ../../../trunk/examples/svcomp/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:20:54,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:20:54,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:20:55,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:20:55,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:20:55,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:20:55,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:20:55,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:20:55,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:20:55,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:20:55,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:20:55,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:20:55,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:20:55,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:20:55,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:20:55,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:20:55,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:20:55,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:20:55,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:20:55,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:20:55,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:20:55,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:20:55,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:20:55,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:20:55,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:20:55,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:20:55,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:20:55,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:20:55,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:20:55,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:20:55,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:20:55,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:20:55,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:20:55,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:20:55,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:20:55,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:20:55,042 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 [2019-09-03 20:20:55,056 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:20:55,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:20:55,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:20:55,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:20:55,058 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:20:55,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:20:55,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:20:55,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:20:55,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:20:55,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:20:55,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:20:55,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:20:55,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:20:55,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:20:55,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:20:55,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:20:55,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:20:55,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:20:55,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:20:55,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:20:55,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:20:55,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:20:55,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:20:55,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:20:55,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:20:55,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:20:55,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:20:55,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:20:55,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:20:55,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:20:55,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:20:55,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:20:55,114 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:20:55,114 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:20:55,115 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-09-03 20:20:55,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8fba7f6/63059c61805e425193cfc4324f53d36f/FLAG3fc3111dc [2019-09-03 20:20:55,557 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:20:55,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-09-03 20:20:55,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8fba7f6/63059c61805e425193cfc4324f53d36f/FLAG3fc3111dc [2019-09-03 20:20:55,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8fba7f6/63059c61805e425193cfc4324f53d36f [2019-09-03 20:20:55,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:20:55,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:20:55,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:20:55,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:20:55,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:20:55,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:20:55" (1/1) ... [2019-09-03 20:20:55,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae3b6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:55, skipping insertion in model container [2019-09-03 20:20:55,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:20:55" (1/1) ... [2019-09-03 20:20:55,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:20:55,974 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:20:56,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:20:56,218 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:20:56,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:20:56,269 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:20:56,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56 WrapperNode [2019-09-03 20:20:56,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:20:56,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:20:56,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:20:56,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:20:56,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (1/1) ... [2019-09-03 20:20:56,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:20:56,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:20:56,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:20:56,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:20:56,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (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 [2019-09-03 20:20:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:20:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:20:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:20:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:20:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:20:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:20:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:20:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:20:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:20:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:20:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:20:56,633 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:20:56,634 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:20:56,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:20:56 BoogieIcfgContainer [2019-09-03 20:20:56,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:20:56,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:20:56,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:20:56,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:20:56,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:20:55" (1/3) ... [2019-09-03 20:20:56,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd50b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:20:56, skipping insertion in model container [2019-09-03 20:20:56,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:20:56" (2/3) ... [2019-09-03 20:20:56,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd50b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:20:56, skipping insertion in model container [2019-09-03 20:20:56,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:20:56" (3/3) ... [2019-09-03 20:20:56,665 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-09-03 20:20:56,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:20:56,697 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:20:56,715 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:20:56,768 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:20:56,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:20:56,769 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:20:56,770 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:20:56,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:20:56,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:20:56,770 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:20:56,770 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:20:56,770 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:20:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 20:20:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:20:56,790 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:56,790 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:56,792 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-03 20:20:56,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:56,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:56,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:56,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:20:56,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:20:56,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:20:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:20:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:20:56,910 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 20:20:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:56,933 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-03 20:20:56,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:20:56,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:20:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:56,944 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:20:56,944 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:20:56,948 INFO L628 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 [2019-09-03 20:20:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:20:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:20:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:20:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 20:20:56,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 20:20:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:56,987 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 20:20:56,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:20:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 20:20:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:20:56,989 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:56,989 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:56,990 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-03 20:20:56,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:56,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:56,998 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:56,998 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:56,998 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:57,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:57,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:20:57,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:57,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:20:57,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:20:57,105 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:20:57,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:20:57,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:20:57,106 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 20:20:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:57,315 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:20:57,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:20:57,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:20:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:57,317 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:20:57,317 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:20:57,319 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:20:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:20:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:20:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:20:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 20:20:57,327 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-03 20:20:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:57,328 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 20:20:57,328 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:20:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 20:20:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:20:57,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:57,329 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:57,330 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-03 20:20:57,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:57,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:57,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:57,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:57,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:57,337 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:57,337 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:57,337 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:57,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:57,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:20:57,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:20:57,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:57,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:20:57,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:20:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:20:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:20:57,460 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-03 20:20:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:57,609 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-03 20:20:57,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:20:57,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-03 20:20:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:57,611 INFO L225 Difference]: With dead ends: 34 [2019-09-03 20:20:57,611 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:20:57,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:20:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:20:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-03 20:20:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:20:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-03 20:20:57,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-09-03 20:20:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:57,621 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-03 20:20:57,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:20:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-03 20:20:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:20:57,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:57,622 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:57,622 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-03 20:20:57,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:57,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:57,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:57,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:57,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:57,629 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:57,629 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:57,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:20:57,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:57,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:20:57,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:20:57,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:20:57,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:20:57,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:57,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:20:57,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:20:57,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:20:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:20:57,774 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-09-03 20:20:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:58,332 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-03 20:20:58,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:20:58,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-03 20:20:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:58,334 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:20:58,334 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:20:58,334 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:20:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:20:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-09-03 20:20:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:20:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-09-03 20:20:58,344 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-09-03 20:20:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:58,344 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-09-03 20:20:58,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:20:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-09-03 20:20:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:20:58,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:58,346 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:58,346 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-09-03 20:20:58,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:58,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:58,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:58,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:20:58,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:58,352 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:58,352 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:58,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:20:58,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:20:58,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 20:20:58,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:58,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:20:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:20:58,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:20:58,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:20:58,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:20:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:20:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:20:58,528 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-09-03 20:20:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:20:58,692 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-09-03 20:20:58,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:20:58,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-09-03 20:20:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:20:58,697 INFO L225 Difference]: With dead ends: 46 [2019-09-03 20:20:58,697 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:20:58,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:20:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:20:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:20:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:20:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-03 20:20:58,712 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-09-03 20:20:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:20:58,713 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-03 20:20:58,713 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:20:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-03 20:20:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:20:58,715 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:20:58,715 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:20:58,715 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:20:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:20:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-03 20:20:58,716 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:20:58,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:20:58,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:58,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:20:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:20:58,733 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:20:58,733 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:20:58,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:20:58,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:20:58,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:20:58,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:20:58,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:20:58,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:20:58,909 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-09-03 20:21:00,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:21:01,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:01,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:21:01,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:21:01,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:21:01,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2019-09-03 20:21:01,273 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-09-03 20:21:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:02,129 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-03 20:21:02,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:21:02,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-03 20:21:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:02,139 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:21:02,139 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:21:02,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2019-09-03 20:21:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:21:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-09-03 20:21:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:21:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-03 20:21:02,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2019-09-03 20:21:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:02,155 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-03 20:21:02,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:21:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-03 20:21:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 20:21:02,156 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:02,156 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:02,157 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-09-03 20:21:02,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:02,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:02,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:02,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:02,166 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:02,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:21:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:02,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:02,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:02,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:21:02,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:02,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:21:02,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:02,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:21:02,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:21:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:21:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:21:02,380 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 10 states. [2019-09-03 20:21:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:02,553 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-09-03 20:21:02,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:21:02,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-09-03 20:21:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:02,555 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:21:02,555 INFO L226 Difference]: Without dead ends: 35 [2019-09-03 20:21:02,555 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:21:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-03 20:21:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-03 20:21:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-03 20:21:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-09-03 20:21:02,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 35 [2019-09-03 20:21:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:02,567 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-09-03 20:21:02,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:21:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-09-03 20:21:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 20:21:02,568 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:02,568 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:02,569 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-09-03 20:21:02,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:02,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:02,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:02,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:02,574 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:02,574 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:02,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:21:02,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:02,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:21:02,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:02,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:21:02,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:02,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-03 20:21:02,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:02,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:21:02,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:21:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:21:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:21:02,790 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-09-03 20:21:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:02,969 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-09-03 20:21:02,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:21:02,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-09-03 20:21:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:02,972 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:21:02,972 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:21:02,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:21:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:21:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:21:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:21:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-09-03 20:21:02,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 42 [2019-09-03 20:21:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:02,991 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-09-03 20:21:02,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:21:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-09-03 20:21:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:21:02,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:02,997 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:02,997 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:02,998 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-09-03 20:21:02,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:02,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:02,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:03,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:03,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:03,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:03,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:03,005 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:21:03,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:21:03,053 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:21:03,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:03,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-03 20:21:03,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:03,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 20:21:03,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:03,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:21:03,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:21:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:21:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:21:03,176 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-09-03 20:21:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:03,365 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-09-03 20:21:03,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:21:03,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-09-03 20:21:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:03,367 INFO L225 Difference]: With dead ends: 47 [2019-09-03 20:21:03,367 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:21:03,368 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:21:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:21:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 20:21:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:21:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-03 20:21:03,379 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 49 [2019-09-03 20:21:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:03,379 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-03 20:21:03,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:21:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-03 20:21:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 20:21:03,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:03,381 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:03,381 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:03,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-09-03 20:21:03,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:03,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:03,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:03,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:03,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:03,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:03,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:03,387 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-03 20:21:03,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:21:34,859 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 20:21:34,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:34,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:21:34,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:34,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 20:21:35,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:35,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-03 20:21:35,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:21:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:21:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:21:35,016 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-09-03 20:21:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:35,260 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-03 20:21:35,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:21:35,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-09-03 20:21:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:35,262 INFO L225 Difference]: With dead ends: 50 [2019-09-03 20:21:35,262 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 20:21:35,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:21:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 20:21:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-03 20:21:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 20:21:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-09-03 20:21:35,284 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 56 [2019-09-03 20:21:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:35,284 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-09-03 20:21:35,284 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:21:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-09-03 20:21:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 20:21:35,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:35,290 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:35,290 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-09-03 20:21:35,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:35,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:35,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:35,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:35,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:35,306 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:35,306 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:35,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:21:35,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:21:35,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:21:35,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:35,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 20:21:35,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:35,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-03 20:21:35,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:35,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:21:35,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:21:35,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:21:35,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:21:35,664 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 15 states. [2019-09-03 20:21:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:35,920 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2019-09-03 20:21:35,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:21:35,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-09-03 20:21:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:35,922 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:21:35,922 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 20:21:35,923 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:21:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 20:21:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-03 20:21:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 20:21:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-09-03 20:21:35,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 63 [2019-09-03 20:21:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:35,935 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-09-03 20:21:35,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:21:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-09-03 20:21:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 20:21:35,936 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:35,936 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:35,937 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-09-03 20:21:35,937 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:35,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:35,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:35,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:35,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:35,942 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:35,942 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:35,942 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:21:35,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:21:35,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-03 20:21:35,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:36,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 17 proven. 109 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-03 20:21:36,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:36,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-03 20:21:36,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:21:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:21:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:21:36,187 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 15 states. [2019-09-03 20:21:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:36,516 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-09-03 20:21:36,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:21:36,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2019-09-03 20:21:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:36,520 INFO L225 Difference]: With dead ends: 56 [2019-09-03 20:21:36,520 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 20:21:36,521 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:21:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 20:21:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-03 20:21:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:21:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-09-03 20:21:36,548 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 70 [2019-09-03 20:21:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:36,549 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-09-03 20:21:36,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:21:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-09-03 20:21:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-03 20:21:36,552 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:36,553 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:36,553 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-09-03 20:21:36,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:36,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:36,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:21:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:36,562 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:36,562 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:36,562 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-03 20:21:36,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:21:36,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:21:36,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:21:36,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 20:21:36,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:21:36,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:21:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 19 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-03 20:21:36,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:21:36,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:21:36,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:21:36,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:21:36,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:21:36,916 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 16 states. [2019-09-03 20:21:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:21:37,311 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-09-03 20:21:37,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:21:37,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-09-03 20:21:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:21:37,314 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:21:37,314 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 20:21:37,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:21:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 20:21:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-03 20:21:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-03 20:21:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-09-03 20:21:37,339 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 77 [2019-09-03 20:21:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:21:37,340 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-09-03 20:21:37,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:21:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-09-03 20:21:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-03 20:21:37,343 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:21:37,343 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:21:37,343 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:21:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:21:37,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-09-03 20:21:37,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:21:37,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:21:37,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:37,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:21:37,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:21:37,354 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:21:37,354 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:21:37,354 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:21:37,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:03,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 20:27:03,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:03,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 20:27:03,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:03,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-03 20:27:03,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:03,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:27:03,759 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:27:03,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:27:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:27:03,760 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 18 states. [2019-09-03 20:27:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:04,147 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-09-03 20:27:04,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:27:04,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-09-03 20:27:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:04,149 INFO L225 Difference]: With dead ends: 62 [2019-09-03 20:27:04,149 INFO L226 Difference]: Without dead ends: 56 [2019-09-03 20:27:04,150 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:27:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-03 20:27:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-03 20:27:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 20:27:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-09-03 20:27:04,174 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 84 [2019-09-03 20:27:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:04,175 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-09-03 20:27:04,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:27:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-09-03 20:27:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:27:04,176 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:04,176 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:04,176 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-09-03 20:27:04,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:04,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:04,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:04,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:04,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:04,186 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:04,187 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:04,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:27:04,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:04,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:27:04,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:27:04,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:27:04,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:27:04,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:27:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 20:27:04,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:27:04,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:27:04,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:27:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:27:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:27:04,490 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 18 states. [2019-09-03 20:27:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:27:04,955 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-09-03 20:27:04,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:27:04,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-03 20:27:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:27:04,957 INFO L225 Difference]: With dead ends: 65 [2019-09-03 20:27:04,957 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 20:27:04,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:27:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 20:27:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 20:27:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 20:27:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2019-09-03 20:27:04,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 91 [2019-09-03 20:27:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:27:04,971 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2019-09-03 20:27:04,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:27:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2019-09-03 20:27:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-03 20:27:04,972 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:27:04,972 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:27:04,973 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:27:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:27:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-09-03 20:27:04,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:27:04,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:27:04,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:04,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:27:04,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:27:04,977 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:27:04,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:27:04,978 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:27:04,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1