/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/Problem15_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:33,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:33,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:33,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:52:33,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:33,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:33,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:33,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:33,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:33,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:33,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:33,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:33,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:33,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:33,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:33,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:33,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:52:33,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:33,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:33,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:33,174 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 22:52:33,199 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:33,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:33,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:33,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:33,204 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:33,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:33,204 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:33,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:33,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:33,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:33,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:33,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:33,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:33,206 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:33,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:33,207 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:33,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:33,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:33,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:33,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:33,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:33,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:33,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:33,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:33,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:33,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:33,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:33,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:33,211 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 22:52:33,485 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:33,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:33,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:33,502 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:33,503 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:33,504 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-11-06 22:52:33,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c86661ca2/702620dd3b224bcb9593353f474b41e9/FLAG5e392c454 [2019-11-06 22:52:34,235 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:52:34,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-11-06 22:52:34,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c86661ca2/702620dd3b224bcb9593353f474b41e9/FLAG5e392c454 [2019-11-06 22:52:34,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c86661ca2/702620dd3b224bcb9593353f474b41e9 [2019-11-06 22:52:34,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:52:34,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:52:34,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:34,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:52:34,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:52:34,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:34" (1/1) ... [2019-11-06 22:52:34,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6178a6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:34, skipping insertion in model container [2019-11-06 22:52:34,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:34" (1/1) ... [2019-11-06 22:52:34,407 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:52:34,493 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:52:35,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:35,507 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:52:35,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:35,805 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:52:35,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35 WrapperNode [2019-11-06 22:52:35,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:35,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:52:35,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:52:35,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:52:35,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:35,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:35,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:35,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:35,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:35,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:36,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (1/1) ... [2019-11-06 22:52:36,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:52:36,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:52:36,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:52:36,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:52:36,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (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 22:52:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:52:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:52:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:52:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:52:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:52:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:52:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:52:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:52:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:52:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:52:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:52:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:52:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:52:39,419 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:52:39,421 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:52:39,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:39 BoogieIcfgContainer [2019-11-06 22:52:39,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:52:39,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:52:39,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:52:39,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:52:39,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:34" (1/3) ... [2019-11-06 22:52:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee2153c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:39, skipping insertion in model container [2019-11-06 22:52:39,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:35" (2/3) ... [2019-11-06 22:52:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee2153c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:39, skipping insertion in model container [2019-11-06 22:52:39,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:39" (3/3) ... [2019-11-06 22:52:39,439 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2019-11-06 22:52:39,454 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:52:39,464 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:52:39,476 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:52:39,519 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:52:39,519 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:52:39,520 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:52:39,520 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:52:39,520 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:52:39,520 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:52:39,520 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:52:39,520 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:52:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:52:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 22:52:39,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:39,565 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:52:39,567 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1566506531, now seen corresponding path program 1 times [2019-11-06 22:52:39,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:39,585 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411599010] [2019-11-06 22:52:39,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:39,979 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 22:52:39,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411599010] [2019-11-06 22:52:39,981 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:39,981 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:39,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278538538] [2019-11-06 22:52:39,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:39,990 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:40,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:40,008 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:52:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:47,392 INFO L93 Difference]: Finished difference Result 1510 states and 2773 transitions. [2019-11-06 22:52:47,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:47,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2019-11-06 22:52:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:47,422 INFO L225 Difference]: With dead ends: 1510 [2019-11-06 22:52:47,422 INFO L226 Difference]: Without dead ends: 1006 [2019-11-06 22:52:47,430 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 22:52:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2019-11-06 22:52:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2019-11-06 22:52:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2019-11-06 22:52:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1509 transitions. [2019-11-06 22:52:47,580 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1509 transitions. Word has length 69 [2019-11-06 22:52:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:47,580 INFO L462 AbstractCegarLoop]: Abstraction has 1004 states and 1509 transitions. [2019-11-06 22:52:47,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1509 transitions. [2019-11-06 22:52:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:52:47,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:47,592 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:52:47,592 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:47,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1392036326, now seen corresponding path program 1 times [2019-11-06 22:52:47,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:47,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537071757] [2019-11-06 22:52:47,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:47,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537071757] [2019-11-06 22:52:47,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:47,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:47,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248419657] [2019-11-06 22:52:47,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:47,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:47,820 INFO L87 Difference]: Start difference. First operand 1004 states and 1509 transitions. Second operand 4 states. [2019-11-06 22:52:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:53,259 INFO L93 Difference]: Finished difference Result 3855 states and 5892 transitions. [2019-11-06 22:52:53,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:53,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-06 22:52:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:53,279 INFO L225 Difference]: With dead ends: 3855 [2019-11-06 22:52:53,279 INFO L226 Difference]: Without dead ends: 2857 [2019-11-06 22:52:53,283 INFO L630 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 [2019-11-06 22:52:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2019-11-06 22:52:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2019-11-06 22:52:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2019-11-06 22:52:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 3894 transitions. [2019-11-06 22:52:53,385 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 3894 transitions. Word has length 138 [2019-11-06 22:52:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:53,390 INFO L462 AbstractCegarLoop]: Abstraction has 2855 states and 3894 transitions. [2019-11-06 22:52:53,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 3894 transitions. [2019-11-06 22:52:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 22:52:53,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:53,407 INFO L410 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, 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, 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 22:52:53,408 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash -124404866, now seen corresponding path program 1 times [2019-11-06 22:52:53,408 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:53,409 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809356597] [2019-11-06 22:52:53,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:52:53,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809356597] [2019-11-06 22:52:53,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472585912] [2019-11-06 22:52:53,847 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 [2019-11-06 22:52:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:53,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:52:53,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 22:52:54,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 22:52:54,479 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:52:54,480 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:52:54,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660769751] [2019-11-06 22:52:54,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:54,481 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:54,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:54,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:52:54,484 INFO L87 Difference]: Start difference. First operand 2855 states and 3894 transitions. Second operand 5 states. [2019-11-06 22:52:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:57,537 INFO L93 Difference]: Finished difference Result 8223 states and 11367 transitions. [2019-11-06 22:52:57,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:52:57,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-11-06 22:52:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:57,566 INFO L225 Difference]: With dead ends: 8223 [2019-11-06 22:52:57,566 INFO L226 Difference]: Without dead ends: 5374 [2019-11-06 22:52:57,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:52:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2019-11-06 22:52:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 5065. [2019-11-06 22:52:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5065 states. [2019-11-06 22:52:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5065 states to 5065 states and 6471 transitions. [2019-11-06 22:52:57,694 INFO L78 Accepts]: Start accepts. Automaton has 5065 states and 6471 transitions. Word has length 247 [2019-11-06 22:52:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:57,695 INFO L462 AbstractCegarLoop]: Abstraction has 5065 states and 6471 transitions. [2019-11-06 22:52:57,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5065 states and 6471 transitions. [2019-11-06 22:52:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-11-06 22:52:57,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:57,707 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:52:57,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:52:57,911 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1309734060, now seen corresponding path program 1 times [2019-11-06 22:52:57,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:57,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327076035] [2019-11-06 22:52:57,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:52:58,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327076035] [2019-11-06 22:52:58,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092612121] [2019-11-06 22:52:58,470 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 [2019-11-06 22:52:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:58,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:52:58,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:52:58,865 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:52:59,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1659205041] [2019-11-06 22:52:59,132 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 432 [2019-11-06 22:52:59,199 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:52:59,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:53:09,357 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:53:09,359 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 451 root evaluator evaluations with a maximum evaluation depth of 14. Performed 451 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:53:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:09,363 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates