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/Problem14_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:48,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:48,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:48,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:06:48,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:48,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:48,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:48,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:48,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:48,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:48,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:48,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:48,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:48,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:48,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:48,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:48,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:48,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:48,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:48,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:48,934 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 00:06:48,949 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:48,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:48,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:48,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:48,952 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:48,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:48,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:48,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:48,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:48,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:48,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:48,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:48,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:48,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:48,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:48,955 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:48,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:48,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:48,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:48,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:48,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:48,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:48,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:48,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:48,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:48,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:48,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:48,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:48,959 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 00:06:49,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:49,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:49,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:49,271 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:49,271 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:49,272 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-15 00:06:49,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23c9cd6a/2207c5ca6f8c433880457449b132f12c/FLAG4436ce07a [2019-10-15 00:06:49,966 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:49,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-15 00:06:49,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23c9cd6a/2207c5ca6f8c433880457449b132f12c/FLAG4436ce07a [2019-10-15 00:06:50,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23c9cd6a/2207c5ca6f8c433880457449b132f12c [2019-10-15 00:06:50,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:50,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:50,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:50,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:50,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:50,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:50" (1/1) ... [2019-10-15 00:06:50,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a94e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:50, skipping insertion in model container [2019-10-15 00:06:50,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:50" (1/1) ... [2019-10-15 00:06:50,208 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:50,263 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:50,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:50,792 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:51,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:51,076 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:51,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51 WrapperNode [2019-10-15 00:06:51,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:51,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:51,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:51,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:51,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (1/1) ... [2019-10-15 00:06:51,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:51,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:51,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:51,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:51,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (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 00:06:51,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:51,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:51,280 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:51,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:51,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:51,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:52,699 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:52,699 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:52,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:52 BoogieIcfgContainer [2019-10-15 00:06:52,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:52,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:52,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:52,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:52,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:50" (1/3) ... [2019-10-15 00:06:52,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe23784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:52, skipping insertion in model container [2019-10-15 00:06:52,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:51" (2/3) ... [2019-10-15 00:06:52,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe23784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:52, skipping insertion in model container [2019-10-15 00:06:52,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:52" (3/3) ... [2019-10-15 00:06:52,711 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2019-10-15 00:06:52,722 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:52,731 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:52,743 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:52,777 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:52,777 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:52,777 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:52,778 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:52,778 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:52,778 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:52,778 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:52,779 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 00:06:52,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:52,819 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] [2019-10-15 00:06:52,822 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:52,829 INFO L82 PathProgramCache]: Analyzing trace with hash 606791250, now seen corresponding path program 1 times [2019-10-15 00:06:52,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:52,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702963757] [2019-10-15 00:06:52,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:52,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:52,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:53,207 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 00:06:53,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702963757] [2019-10-15 00:06:53,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:53,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:53,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372884435] [2019-10-15 00:06:53,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:53,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:53,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:53,234 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:06:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:55,255 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-15 00:06:55,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:55,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-15 00:06:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:55,277 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:06:55,278 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:06:55,287 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 00:06:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:06:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-15 00:06:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-15 00:06:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-15 00:06:55,387 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 63 [2019-10-15 00:06:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:55,388 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-15 00:06:55,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-15 00:06:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 00:06:55,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:55,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:55,398 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:55,399 INFO L82 PathProgramCache]: Analyzing trace with hash 905975074, now seen corresponding path program 1 times [2019-10-15 00:06:55,399 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:55,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861281898] [2019-10-15 00:06:55,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:55,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:55,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:55,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861281898] [2019-10-15 00:06:55,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:55,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:55,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652677225] [2019-10-15 00:06:55,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:55,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:55,585 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-15 00:06:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:57,224 INFO L93 Difference]: Finished difference Result 2194 states and 3255 transitions. [2019-10-15 00:06:57,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:57,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-15 00:06:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:57,237 INFO L225 Difference]: With dead ends: 2194 [2019-10-15 00:06:57,237 INFO L226 Difference]: Without dead ends: 1646 [2019-10-15 00:06:57,241 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 00:06:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-15 00:06:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1464. [2019-10-15 00:06:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-10-15 00:06:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2038 transitions. [2019-10-15 00:06:57,334 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2038 transitions. Word has length 175 [2019-10-15 00:06:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:57,335 INFO L462 AbstractCegarLoop]: Abstraction has 1464 states and 2038 transitions. [2019-10-15 00:06:57,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2038 transitions. [2019-10-15 00:06:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-15 00:06:57,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:57,345 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, 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] [2019-10-15 00:06:57,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash 338201322, now seen corresponding path program 1 times [2019-10-15 00:06:57,347 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:57,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283287551] [2019-10-15 00:06:57,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:57,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:57,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:57,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283287551] [2019-10-15 00:06:57,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037499529] [2019-10-15 00:06:57,663 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 00:06:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:57,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:06:57,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:57,963 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:58,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [488156894] [2019-10-15 00:06:58,162 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 258 [2019-10-15 00:06:58,220 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:58,220 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:07,537 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:07,540 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Performed 271 root evaluator evaluations with a maximum evaluation depth of 13. Performed 271 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:07:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:07,545 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:07:15,155 INFO L227 lantSequenceWeakener]: Weakened 238 states. On average, predicates are now at 78.25% of their original sizes. [2019-10-15 00:07:15,155 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:07:15,283 INFO L553 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2019-10-15 00:07:15,283 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:07:15,284 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:07:15,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-15 00:07:15,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490092117] [2019-10-15 00:07:15,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:07:15,288 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:15,288 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:07:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:07:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:15,289 INFO L87 Difference]: Start difference. First operand 1464 states and 2038 transitions. Second operand 11 states.