/usr/bin/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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:39,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:39,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:39,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:49:39,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:39,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:39,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:39,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:39,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:39,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:39,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:39,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:39,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:39,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:39,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:39,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:39,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:49:39,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:39,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:39,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:39,369 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 [2019-11-06 22:49:39,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:39,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:39,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:39,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:39,390 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:39,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:39,390 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:39,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:39,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:39,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:39,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:39,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:39,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:39,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:39,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:39,392 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:39,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:39,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:39,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:39,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:39,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:39,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:39,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:39,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:39,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:39,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:39,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:39,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:39,395 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 [2019-11-06 22:49:39,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:39,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:39,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:39,681 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:39,681 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:39,682 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-06 22:49:39,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc9d8e99/ad2b5be34c1b48aebe534131c6b7ffa9/FLAGa11a80947 [2019-11-06 22:49:40,468 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:40,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-06 22:49:40,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc9d8e99/ad2b5be34c1b48aebe534131c6b7ffa9/FLAGa11a80947 [2019-11-06 22:49:40,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc9d8e99/ad2b5be34c1b48aebe534131c6b7ffa9 [2019-11-06 22:49:41,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:41,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:41,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:41,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:41,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:41,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:40" (1/1) ... [2019-11-06 22:49:41,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0e0423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:41, skipping insertion in model container [2019-11-06 22:49:41,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:40" (1/1) ... [2019-11-06 22:49:41,019 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:41,182 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:42,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:42,933 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:43,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:43,760 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:43,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43 WrapperNode [2019-11-06 22:49:43,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:43,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:43,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:43,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:43,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:43,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:43,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:43,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:44,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:44,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:44,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (1/1) ... [2019-11-06 22:49:44,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:44,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:44,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:44,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:44,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (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 [2019-11-06 22:49:44,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:44,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:51,007 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:51,007 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:51,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:51 BoogieIcfgContainer [2019-11-06 22:49:51,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:51,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:51,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:51,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:51,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:40" (1/3) ... [2019-11-06 22:49:51,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2862c455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:51, skipping insertion in model container [2019-11-06 22:49:51,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:43" (2/3) ... [2019-11-06 22:49:51,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2862c455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:51, skipping insertion in model container [2019-11-06 22:49:51,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:51" (3/3) ... [2019-11-06 22:49:51,024 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-11-06 22:49:51,037 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:51,048 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:51,062 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:51,107 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:51,108 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:51,108 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:51,108 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:51,108 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:51,108 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:51,108 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:51,109 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-11-06 22:49:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 22:49:51,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:51,165 INFO L410 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] [2019-11-06 22:49:51,167 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-11-06 22:49:51,183 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:51,183 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778685283] [2019-11-06 22:49:51,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:51,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778685283] [2019-11-06 22:49:51,573 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:51,573 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:51,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779096986] [2019-11-06 22:49:51,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:51,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:51,604 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-11-06 22:50:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:01,331 INFO L93 Difference]: Finished difference Result 3964 states and 7388 transitions. [2019-11-06 22:50:01,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:01,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-06 22:50:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:01,374 INFO L225 Difference]: With dead ends: 3964 [2019-11-06 22:50:01,375 INFO L226 Difference]: Without dead ends: 2758 [2019-11-06 22:50:01,386 INFO L630 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 [2019-11-06 22:50:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-11-06 22:50:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-11-06 22:50:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-11-06 22:50:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-11-06 22:50:01,543 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 61 [2019-11-06 22:50:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:01,544 INFO L462 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-11-06 22:50:01,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-11-06 22:50:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:50:01,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:01,551 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:01,551 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-11-06 22:50:01,552 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:01,552 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981709895] [2019-11-06 22:50:01,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:01,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981709895] [2019-11-06 22:50:01,763 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:01,763 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:01,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800504123] [2019-11-06 22:50:01,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:01,771 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:01,772 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-11-06 22:50:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:09,763 INFO L93 Difference]: Finished difference Result 5545 states and 9710 transitions. [2019-11-06 22:50:09,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:50:09,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-06 22:50:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:09,790 INFO L225 Difference]: With dead ends: 5545 [2019-11-06 22:50:09,790 INFO L226 Difference]: Without dead ends: 3632 [2019-11-06 22:50:09,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:50:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-11-06 22:50:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-11-06 22:50:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-11-06 22:50:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-11-06 22:50:09,921 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 130 [2019-11-06 22:50:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:09,926 INFO L462 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-11-06 22:50:09,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-11-06 22:50:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:50:09,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:09,936 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:50:09,937 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1084274893, now seen corresponding path program 1 times [2019-11-06 22:50:09,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:09,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459924275] [2019-11-06 22:50:09,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:10,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459924275] [2019-11-06 22:50:10,149 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:10,149 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:50:10,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260042826] [2019-11-06 22:50:10,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:50:10,152 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:50:10,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:50:10,153 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states.