java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:34,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:34,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:34,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:07:34,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:34,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:34,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:34,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:34,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:34,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:34,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:34,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:34,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:34,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:34,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:34,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:34,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:34,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:34,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:34,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:34,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:07:34,963 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:34,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:34,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:34,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:34,965 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:34,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:34,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:34,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:34,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:34,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:34,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:34,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:34,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:34,967 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:34,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:34,967 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:34,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:34,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:34,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:34,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:34,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:34,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:34,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:34,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:34,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:34,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:34,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:34,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:34,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:07:35,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:35,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:35,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:35,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:35,306 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:35,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-15 00:07:35,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe55f379a/6ca8f5a1bf4b464484af94645c1f78d9/FLAG8ac213cca [2019-10-15 00:07:36,062 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:36,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-15 00:07:36,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe55f379a/6ca8f5a1bf4b464484af94645c1f78d9/FLAG8ac213cca [2019-10-15 00:07:36,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe55f379a/6ca8f5a1bf4b464484af94645c1f78d9 [2019-10-15 00:07:36,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:36,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:36,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:36,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:36,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:36,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79c54825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36, skipping insertion in model container [2019-10-15 00:07:36,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:36" (1/1) ... [2019-10-15 00:07:36,315 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:36,407 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:37,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:37,406 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:37,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:37,840 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:37,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37 WrapperNode [2019-10-15 00:07:37,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:37,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:37,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:37,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:37,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:37,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:37,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:37,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:37,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:38,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:38,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... [2019-10-15 00:07:38,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:38,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:38,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:38,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:38,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:38,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:38,168 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:38,168 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:38,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:42,003 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:42,003 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:42,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:42 BoogieIcfgContainer [2019-10-15 00:07:42,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:42,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:42,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:42,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:42,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:36" (1/3) ... [2019-10-15 00:07:42,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc843d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:42, skipping insertion in model container [2019-10-15 00:07:42,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:37" (2/3) ... [2019-10-15 00:07:42,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc843d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:42, skipping insertion in model container [2019-10-15 00:07:42,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:42" (3/3) ... [2019-10-15 00:07:42,014 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label43.c [2019-10-15 00:07:42,024 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:42,034 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:42,047 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:42,076 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:42,077 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:42,077 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:42,077 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:42,077 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:42,077 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:42,078 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:42,078 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 00:07:42,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:42,117 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:42,119 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 402824616, now seen corresponding path program 1 times [2019-10-15 00:07:42,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:42,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715044368] [2019-10-15 00:07:42,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:42,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715044368] [2019-10-15 00:07:42,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:42,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:42,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351924380] [2019-10-15 00:07:42,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:42,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:42,567 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:46,988 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:46,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:46,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-15 00:07:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:47,026 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:47,026 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:47,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-15 00:07:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 00:07:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-15 00:07:47,146 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 64 [2019-10-15 00:07:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:47,147 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-15 00:07:47,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-15 00:07:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:07:47,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:47,155 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:47,156 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1979650764, now seen corresponding path program 1 times [2019-10-15 00:07:47,157 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:47,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579150229] [2019-10-15 00:07:47,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:47,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:47,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:47,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579150229] [2019-10-15 00:07:47,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:47,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:47,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129276287] [2019-10-15 00:07:47,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:47,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:47,375 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-15 00:07:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:50,885 INFO L93 Difference]: Finished difference Result 2632 states and 4594 transitions. [2019-10-15 00:07:50,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:50,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-15 00:07:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:50,897 INFO L225 Difference]: With dead ends: 2632 [2019-10-15 00:07:50,898 INFO L226 Difference]: Without dead ends: 1941 [2019-10-15 00:07:50,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-10-15 00:07:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-10-15 00:07:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-10-15 00:07:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-10-15 00:07:50,966 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 133 [2019-10-15 00:07:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:50,966 INFO L462 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-10-15 00:07:50,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-10-15 00:07:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 00:07:50,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:50,978 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:50,978 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1305643434, now seen corresponding path program 1 times [2019-10-15 00:07:50,979 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:50,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258254138] [2019-10-15 00:07:50,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:50,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:51,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258254138] [2019-10-15 00:07:51,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:51,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:51,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388654425] [2019-10-15 00:07:51,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:51,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:51,256 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-10-15 00:07:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:58,120 INFO L93 Difference]: Finished difference Result 5496 states and 8518 transitions. [2019-10-15 00:07:58,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:58,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-10-15 00:07:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:58,148 INFO L225 Difference]: With dead ends: 5496 [2019-10-15 00:07:58,157 INFO L226 Difference]: Without dead ends: 3566 [2019-10-15 00:07:58,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-10-15 00:07:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-10-15 00:07:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-10-15 00:07:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-10-15 00:07:58,324 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 214 [2019-10-15 00:07:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:58,326 INFO L462 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-10-15 00:07:58,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-10-15 00:07:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-15 00:07:58,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:58,334 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:58,334 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash 40242713, now seen corresponding path program 1 times [2019-10-15 00:07:58,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:58,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250668941] [2019-10-15 00:07:58,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:58,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:58,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:58,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250668941] [2019-10-15 00:07:58,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089247148] [2019-10-15 00:07:58,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:58,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:07:58,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-15 00:07:58,821 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:59,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:59,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:07:59,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274988285] [2019-10-15 00:07:59,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:59,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:59,145 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 5 states. [2019-10-15 00:08:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:02,947 INFO L93 Difference]: Finished difference Result 10012 states and 15157 transitions. [2019-10-15 00:08:02,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:08:02,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 237 [2019-10-15 00:08:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:02,984 INFO L225 Difference]: With dead ends: 10012 [2019-10-15 00:08:02,985 INFO L226 Difference]: Without dead ends: 6472 [2019-10-15 00:08:02,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:08:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2019-10-15 00:08:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 5183. [2019-10-15 00:08:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5183 states. [2019-10-15 00:08:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 7218 transitions. [2019-10-15 00:08:03,162 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 7218 transitions. Word has length 237 [2019-10-15 00:08:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:03,162 INFO L462 AbstractCegarLoop]: Abstraction has 5183 states and 7218 transitions. [2019-10-15 00:08:03,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 7218 transitions. [2019-10-15 00:08:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-15 00:08:03,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:03,170 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:03,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:03,382 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1475726661, now seen corresponding path program 1 times [2019-10-15 00:08:03,383 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:03,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030676941] [2019-10-15 00:08:03,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:03,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:03,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:08:03,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030676941] [2019-10-15 00:08:03,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502706105] [2019-10-15 00:08:03,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:03,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:08:03,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:08:04,120 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:08:04,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:04,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-15 00:08:04,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712717268] [2019-10-15 00:08:04,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:04,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:04,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:04,569 INFO L87 Difference]: Start difference. First operand 5183 states and 7218 transitions. Second operand 4 states. [2019-10-15 00:08:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:07,192 INFO L93 Difference]: Finished difference Result 12545 states and 17576 transitions. [2019-10-15 00:08:07,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:07,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2019-10-15 00:08:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:07,229 INFO L225 Difference]: With dead ends: 12545 [2019-10-15 00:08:07,230 INFO L226 Difference]: Without dead ends: 7368 [2019-10-15 00:08:07,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2019-10-15 00:08:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 5819. [2019-10-15 00:08:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5819 states. [2019-10-15 00:08:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8010 transitions. [2019-10-15 00:08:07,403 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8010 transitions. Word has length 338 [2019-10-15 00:08:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:07,404 INFO L462 AbstractCegarLoop]: Abstraction has 5819 states and 8010 transitions. [2019-10-15 00:08:07,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8010 transitions. [2019-10-15 00:08:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-10-15 00:08:07,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:07,414 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:07,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:07,618 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash 697115230, now seen corresponding path program 1 times [2019-10-15 00:08:07,620 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:07,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706657839] [2019-10-15 00:08:07,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:07,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:07,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:08,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706657839] [2019-10-15 00:08:08,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878655771] [2019-10-15 00:08:08,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:08,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:08:08,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:08:08,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 00:08:08,445 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:08:08,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-15 00:08:08,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308996009] [2019-10-15 00:08:08,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:08,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:08,448 INFO L87 Difference]: Start difference. First operand 5819 states and 8010 transitions. Second operand 4 states. [2019-10-15 00:08:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:11,370 INFO L93 Difference]: Finished difference Result 12564 states and 17246 transitions. [2019-10-15 00:08:11,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:11,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 390 [2019-10-15 00:08:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:11,402 INFO L225 Difference]: With dead ends: 12564 [2019-10-15 00:08:11,403 INFO L226 Difference]: Without dead ends: 6751 [2019-10-15 00:08:11,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2019-10-15 00:08:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6745. [2019-10-15 00:08:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6745 states. [2019-10-15 00:08:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 8718 transitions. [2019-10-15 00:08:11,587 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 8718 transitions. Word has length 390 [2019-10-15 00:08:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:11,588 INFO L462 AbstractCegarLoop]: Abstraction has 6745 states and 8718 transitions. [2019-10-15 00:08:11,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 8718 transitions. [2019-10-15 00:08:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-10-15 00:08:11,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:11,601 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:11,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:11,812 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2032391352, now seen corresponding path program 1 times [2019-10-15 00:08:11,813 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:11,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233354361] [2019-10-15 00:08:11,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:11,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:11,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:12,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233354361] [2019-10-15 00:08:12,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800549443] [2019-10-15 00:08:12,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:12,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:12,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:12,887 INFO L321 TraceCheckSpWp]: Computing backward predicates...