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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:08:55,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:08:55,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:08:55,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:08:55,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:08:55,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:08:55,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:08:55,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:08:55,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:08:55,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:08:55,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:08:55,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:08:55,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:08:55,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:08:55,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:08:55,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:08:55,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:08:55,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:08:55,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:08:55,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:08:55,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:08:55,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:08:55,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:08:55,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:08:55,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 21:08:55,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:08:55,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:08:55,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:08:55,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:08:55,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:08:55,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:08:55,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:08:55,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-03 21:08:55,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 21:08:56,008 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:08:56,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:08:56,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:08:56,009 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:08:56,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:08:56,009 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:08:56,010 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:08:56,010 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:08:56,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:08:56,010 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:08:56,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:08:56,011 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:08:56,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:08:56,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:08:56,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:08:56,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:08:56,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:08:56,012 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:08:56,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:08:56,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:08:56,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:08:56,013 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:08:56,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:08:56,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:08:56,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:08:56,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:08:56,014 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:08:56,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:08:56,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:08:56,015 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:08:56,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:08:56,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:08:56,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:08:56,062 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:08:56,063 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:08:56,064 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-03 21:08:56,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8670adc2/b33798b13ecf42049092bf21b5b83913/FLAGf5fec7bf8 [2019-09-03 21:08:56,526 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:08:56,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-03 21:08:56,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8670adc2/b33798b13ecf42049092bf21b5b83913/FLAGf5fec7bf8 [2019-09-03 21:08:56,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8670adc2/b33798b13ecf42049092bf21b5b83913 [2019-09-03 21:08:56,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:08:56,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:08:56,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:08:56,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:08:56,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:08:56,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:08:56" (1/1) ... [2019-09-03 21:08:56,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163020e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:56, skipping insertion in model container [2019-09-03 21:08:56,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:08:56" (1/1) ... [2019-09-03 21:08:56,974 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:08:56,997 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:08:57,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:08:57,173 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:08:57,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:08:57,207 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:08:57,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57 WrapperNode [2019-09-03 21:08:57,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:08:57,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:08:57,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:08:57,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:08:57,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (1/1) ... [2019-09-03 21:08:57,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:08:57,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:08:57,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:08:57,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:08:57,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (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 21:08:57,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:08:57,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:08:57,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:08:57,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:08:57,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:08:57,561 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:08:57,561 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:08:57,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:08:57 BoogieIcfgContainer [2019-09-03 21:08:57,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:08:57,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:08:57,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:08:57,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:08:57,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:08:56" (1/3) ... [2019-09-03 21:08:57,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e150141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:08:57, skipping insertion in model container [2019-09-03 21:08:57,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:08:57" (2/3) ... [2019-09-03 21:08:57,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e150141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:08:57, skipping insertion in model container [2019-09-03 21:08:57,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:08:57" (3/3) ... [2019-09-03 21:08:57,570 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-09-03 21:08:57,579 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:08:57,587 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:08:57,614 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:08:57,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:08:57,669 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:08:57,669 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:08:57,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:08:57,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:08:57,670 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:08:57,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:08:57,670 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:08:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-03 21:08:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:08:57,700 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:57,701 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:57,703 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1589353370, now seen corresponding path program 1 times [2019-09-03 21:08:57,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:57,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:57,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:57,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:57,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:57,828 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 21:08:57,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:57,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:08:57,830 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:57,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:08:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:08:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:08:57,851 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-03 21:08:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:57,867 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2019-09-03 21:08:57,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:08:57,869 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:08:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:57,878 INFO L225 Difference]: With dead ends: 26 [2019-09-03 21:08:57,878 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 21:08:57,880 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 21:08:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 21:08:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-03 21:08:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 21:08:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-09-03 21:08:57,921 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2019-09-03 21:08:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:57,922 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-09-03 21:08:57,922 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:08:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2019-09-03 21:08:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:08:57,923 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:57,923 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:57,923 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-09-03 21:08:57,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:57,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:57,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:57,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:57,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:57,935 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:57,936 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:57,936 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-09-03 21:08:57,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:57,958 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:08:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:57,977 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:08:57,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:08:57,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:57,978 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:08:57,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:57,994 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:58,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 21:08:58,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:58,124 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 21:08:58,125 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:58,204 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 21:08:58,210 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:58,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:08:58,210 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:58,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:08:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:08:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:08:58,215 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 5 states. [2019-09-03 21:08:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:58,302 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2019-09-03 21:08:58,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:08:58,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:08:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:58,304 INFO L225 Difference]: With dead ends: 35 [2019-09-03 21:08:58,304 INFO L226 Difference]: Without dead ends: 35 [2019-09-03 21:08:58,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:08:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-03 21:08:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-03 21:08:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 21:08:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2019-09-03 21:08:58,319 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 10 [2019-09-03 21:08:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:58,319 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2019-09-03 21:08:58,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:08:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2019-09-03 21:08:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 21:08:58,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:58,321 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:58,321 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-09-03 21:08:58,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:58,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:58,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:58,324 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:58,330 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:58,330 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:58,331 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:08:58,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,357 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:08:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:58,369 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-03 21:08:58,371 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54] [2019-09-03 21:08:58,406 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:08:58,407 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:08:58,588 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:08:58,591 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:08:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:58,594 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:08:58,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:58,594 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:08:58,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:58,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 21:08:58,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:08:58,689 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:08:58,749 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:58,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:08:58,749 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:58,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:08:58,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:08:58,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:08:58,750 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 5 states. [2019-09-03 21:08:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:58,841 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2019-09-03 21:08:58,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:08:58,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-03 21:08:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:58,845 INFO L225 Difference]: With dead ends: 39 [2019-09-03 21:08:58,845 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 21:08:58,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:08:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 21:08:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-03 21:08:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 21:08:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2019-09-03 21:08:58,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 15 [2019-09-03 21:08:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:58,855 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2019-09-03 21:08:58,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:08:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2019-09-03 21:08:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 21:08:58,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:58,857 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:58,857 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-09-03 21:08:58,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:58,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:58,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:58,859 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:58,866 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:58,866 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:58,866 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 21:08:58,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,881 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:08:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:58,904 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2019-09-03 21:08:58,905 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56] [2019-09-03 21:08:58,908 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:08:58,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:08:58,936 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:08:58,936 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:08:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:58,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:08:58,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:58,937 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:08:58,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:58,955 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:58,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 21:08:58,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 21:08:59,015 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 21:08:59,070 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:59,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:08:59,071 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:59,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:08:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:08:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:08:59,072 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 5 states. [2019-09-03 21:08:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:59,138 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2019-09-03 21:08:59,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:08:59,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-03 21:08:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:59,143 INFO L225 Difference]: With dead ends: 61 [2019-09-03 21:08:59,144 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 21:08:59,144 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:08:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 21:08:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 21:08:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 21:08:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-09-03 21:08:59,172 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 20 [2019-09-03 21:08:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:59,172 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-09-03 21:08:59,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:08:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-09-03 21:08:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-03 21:08:59,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:59,174 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:59,174 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-09-03 21:08:59,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:59,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,180 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:59,197 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:59,197 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:59,197 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 21:08:59,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,211 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:08:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,225 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2019-09-03 21:08:59,225 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58] [2019-09-03 21:08:59,229 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:08:59,229 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:08:59,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:08:59,274 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:08:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:08:59,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:59,275 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:59,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:08:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 21:08:59,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 21:08:59,328 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 21:08:59,358 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:59,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-09-03 21:08:59,359 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:59,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:08:59,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:08:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 21:08:59,360 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 5 states. [2019-09-03 21:08:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:59,411 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2019-09-03 21:08:59,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:08:59,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-03 21:08:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:59,414 INFO L225 Difference]: With dead ends: 63 [2019-09-03 21:08:59,414 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 21:08:59,414 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:08:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 21:08:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-03 21:08:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 21:08:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2019-09-03 21:08:59,425 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 26 [2019-09-03 21:08:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:59,425 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2019-09-03 21:08:59,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:08:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2019-09-03 21:08:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 21:08:59,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:59,427 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:59,427 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:59,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1597054094, now seen corresponding path program 1 times [2019-09-03 21:08:59,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,429 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:59,438 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:59,439 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:59,439 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:08:59,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,466 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:08:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,478 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-03 21:08:59,479 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [24], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57] [2019-09-03 21:08:59,481 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:08:59,481 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:08:59,498 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:08:59,498 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:08:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:08:59,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:59,499 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:59,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,517 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:08:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 21:08:59,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-03 21:08:59,566 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-03 21:08:59,646 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:59,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:08:59,647 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:08:59,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:08:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:08:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:08:59,648 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 5 states. [2019-09-03 21:08:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:08:59,702 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2019-09-03 21:08:59,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:08:59,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-03 21:08:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:08:59,704 INFO L225 Difference]: With dead ends: 71 [2019-09-03 21:08:59,704 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 21:08:59,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:08:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 21:08:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-03 21:08:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 21:08:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2019-09-03 21:08:59,713 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 28 [2019-09-03 21:08:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:08:59,714 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2019-09-03 21:08:59,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:08:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2019-09-03 21:08:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 21:08:59,715 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:08:59,715 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:08:59,716 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:08:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-09-03 21:08:59,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:08:59,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:08:59,718 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:08:59,722 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:08:59,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:08:59,723 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 21:08:59,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,755 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:08:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-03 21:08:59,771 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60] [2019-09-03 21:08:59,773 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:08:59,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:08:59,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:08:59,792 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:08:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:08:59,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:08:59,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:08:59,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:08:59,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:08:59,811 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:08:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:08:59,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 21:08:59,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:08:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 21:08:59,898 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:08:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 21:08:59,994 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:08:59,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-03 21:08:59,995 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:09:00,008 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 21:09:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 21:09:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:09:00,009 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 6 states. [2019-09-03 21:09:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:09:00,115 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2019-09-03 21:09:00,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:09:00,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-03 21:09:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:09:00,117 INFO L225 Difference]: With dead ends: 79 [2019-09-03 21:09:00,117 INFO L226 Difference]: Without dead ends: 77 [2019-09-03 21:09:00,118 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:09:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-03 21:09:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-09-03 21:09:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 21:09:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-09-03 21:09:00,134 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2019-09-03 21:09:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:09:00,137 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-09-03 21:09:00,137 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 21:09:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-09-03 21:09:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-03 21:09:00,138 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:09:00,138 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:09:00,138 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:09:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash -493170476, now seen corresponding path program 2 times [2019-09-03 21:09:00,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:09:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:00,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:00,140 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:09:00,144 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:09:00,144 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:09:00,145 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:09:00,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:09:00,158 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:09:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:00,171 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 21:09:00,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:09:00,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:09:00,171 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:09:00,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 21:09:00,185 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 21:09:00,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 21:09:00,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 21:09:00,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 21:09:00,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:09:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 21:09:00,272 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:09:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 21:09:00,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:09:00,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-03 21:09:00,342 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:09:00,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 21:09:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 21:09:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:09:00,344 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 10 states. [2019-09-03 21:09:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:09:00,654 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2019-09-03 21:09:00,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 21:09:00,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-09-03 21:09:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:09:00,657 INFO L225 Difference]: With dead ends: 98 [2019-09-03 21:09:00,657 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 21:09:00,658 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-09-03 21:09:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 21:09:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-09-03 21:09:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-03 21:09:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2019-09-03 21:09:00,667 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 33 [2019-09-03 21:09:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:09:00,668 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2019-09-03 21:09:00,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 21:09:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2019-09-03 21:09:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 21:09:00,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:09:00,670 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:09:00,670 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:09:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1383929332, now seen corresponding path program 1 times [2019-09-03 21:09:00,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:09:00,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:00,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:09:00,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:00,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:09:00,676 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:09:00,676 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:09:00,676 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 21:09:00,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:00,700 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:09:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:00,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2019-09-03 21:09:00,713 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [24], [26], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57] [2019-09-03 21:09:00,715 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:09:00,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:09:00,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:09:00,743 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:09:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:00,743 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:09:00,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:09:00,743 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:09:00,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:00,761 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:09:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:00,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 21:09:00,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:09:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-03 21:09:00,886 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:09:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-03 21:09:00,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 21:09:00,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-09-03 21:09:00,988 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:09:00,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:09:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:09:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:09:00,990 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand 5 states. [2019-09-03 21:09:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:09:01,032 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2019-09-03 21:09:01,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:09:01,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-09-03 21:09:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:09:01,034 INFO L225 Difference]: With dead ends: 99 [2019-09-03 21:09:01,034 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 21:09:01,035 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 21:09:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 21:09:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-09-03 21:09:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 21:09:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2019-09-03 21:09:01,043 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 46 [2019-09-03 21:09:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:09:01,044 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2019-09-03 21:09:01,044 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:09:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2019-09-03 21:09:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 21:09:01,046 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:09:01,046 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:09:01,046 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:09:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1196309741, now seen corresponding path program 1 times [2019-09-03 21:09:01,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:09:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:01,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:01,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:09:01,053 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:09:01,053 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:09:01,053 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:09:01,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,068 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:09:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:01,082 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2019-09-03 21:09:01,082 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [21], [24], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60] [2019-09-03 21:09:01,086 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:09:01,086 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:09:01,104 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:09:01,105 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:09:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:01,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:09:01,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:09:01,107 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:09:01,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,123 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:09:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:01,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 21:09:01,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:09:01,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:09:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-03 21:09:01,245 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:09:01,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:09:01,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:09:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-03 21:09:01,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:09:01,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-03 21:09:01,349 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:09:01,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 21:09:01,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 21:09:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-03 21:09:01,352 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 13 states. [2019-09-03 21:09:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:09:01,550 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2019-09-03 21:09:01,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 21:09:01,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-09-03 21:09:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:09:01,552 INFO L225 Difference]: With dead ends: 107 [2019-09-03 21:09:01,552 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 21:09:01,552 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-03 21:09:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 21:09:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-03 21:09:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-03 21:09:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2019-09-03 21:09:01,560 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 49 [2019-09-03 21:09:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:09:01,561 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2019-09-03 21:09:01,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 21:09:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2019-09-03 21:09:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-03 21:09:01,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:09:01,563 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:09:01,563 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:09:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1737231151, now seen corresponding path program 1 times [2019-09-03 21:09:01,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:09:01,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:01,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:09:01,565 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:09:01,569 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:09:01,570 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:09:01,570 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:09:01,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,583 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:09:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:01,602 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 60 with the following transitions: [2019-09-03 21:09:01,602 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [21], [26], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64] [2019-09-03 21:09:01,606 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:09:01,606 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:09:01,630 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:09:01,630 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-03 21:09:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:09:01,631 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:09:01,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:09:01,631 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:09:01,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:09:01,645 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:09:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:09:01,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 21:09:01,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:09:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-09-03 21:09:01,717 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:09:01,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:09:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-09-03 21:09:01,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:09:01,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-09-03 21:09:01,795 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:09:01,796 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 21:09:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 21:09:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:09:01,796 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 9 states. [2019-09-03 21:09:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:09:01,924 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2019-09-03 21:09:01,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 21:09:01,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-09-03 21:09:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:09:01,925 INFO L225 Difference]: With dead ends: 106 [2019-09-03 21:09:01,925 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:09:01,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-03 21:09:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:09:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:09:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:09:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:09:01,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2019-09-03 21:09:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:09:01,927 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:09:01,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 21:09:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:09:01,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:09:01,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:09:01 BoogieIcfgContainer [2019-09-03 21:09:01,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:09:01,934 INFO L168 Benchmark]: Toolchain (without parser) took 4978.11 ms. Allocated memory was 134.2 MB in the beginning and 257.4 MB in the end (delta: 123.2 MB). Free memory was 89.8 MB in the beginning and 104.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,935 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,936 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.27 ms. Allocated memory is still 134.2 MB. Free memory was 89.4 MB in the beginning and 79.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,937 INFO L168 Benchmark]: Boogie Preprocessor took 114.73 ms. Allocated memory was 134.2 MB in the beginning and 200.8 MB in the end (delta: 66.6 MB). Free memory was 79.7 MB in the beginning and 177.2 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,938 INFO L168 Benchmark]: RCFGBuilder took 239.17 ms. Allocated memory is still 200.8 MB. Free memory was 177.2 MB in the beginning and 164.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,939 INFO L168 Benchmark]: TraceAbstraction took 4368.17 ms. Allocated memory was 200.8 MB in the beginning and 257.4 MB in the end (delta: 56.6 MB). Free memory was 164.3 MB in the beginning and 104.2 MB in the end (delta: 60.0 MB). Peak memory consumption was 116.7 MB. Max. memory is 7.1 GB. [2019-09-03 21:09:01,942 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.27 ms. Allocated memory is still 134.2 MB. Free memory was 89.4 MB in the beginning and 79.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.73 ms. Allocated memory was 134.2 MB in the beginning and 200.8 MB in the end (delta: 66.6 MB). Free memory was 79.7 MB in the beginning and 177.2 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.17 ms. Allocated memory is still 200.8 MB. Free memory was 177.2 MB in the beginning and 164.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4368.17 ms. Allocated memory was 200.8 MB in the beginning and 257.4 MB in the end (delta: 56.6 MB). Free memory was 164.3 MB in the beginning and 104.2 MB in the end (delta: 60.0 MB). Peak memory consumption was 116.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 4.2s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 291 SDtfs, 96 SDslu, 791 SDs, 0 SdLazy, 578 SolverSat, 69 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 642 GetRequests, 548 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 644 NumberOfCodeBlocks, 634 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 623 ConstructedInterpolants, 20 QuantifiedInterpolants, 76069 SizeOfPredicates, 45 NumberOfNonLiveVariables, 815 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 884/934 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...