/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/Problem11_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:17,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:17,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:17,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:45:17,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:45:17,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:45:17,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:45:17,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:45:17,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:45:17,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:45:17,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:45:17,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:45:17,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:45:17,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:45:17,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:45:17,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:45:17,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:45:17,984 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 22:45:18,003 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:18,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:18,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:18,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:18,007 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:18,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:18,008 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:18,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:18,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:18,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:18,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:18,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:18,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:18,010 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:18,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:18,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:18,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:18,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:18,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:18,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:18,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:18,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:18,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:18,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:18,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:18,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:18,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:18,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:18,013 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 22:45:18,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:18,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:18,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:18,317 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:18,317 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:18,318 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-11-06 22:45:18,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7baaa50/aed312b7cf0f408ca7f39b45d5327af3/FLAG8a712d5db [2019-11-06 22:45:18,971 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:18,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06.c [2019-11-06 22:45:18,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7baaa50/aed312b7cf0f408ca7f39b45d5327af3/FLAG8a712d5db [2019-11-06 22:45:19,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7baaa50/aed312b7cf0f408ca7f39b45d5327af3 [2019-11-06 22:45:19,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:19,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:19,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:19,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:19,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:19,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:19" (1/1) ... [2019-11-06 22:45:19,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4427d3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:19, skipping insertion in model container [2019-11-06 22:45:19,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:19" (1/1) ... [2019-11-06 22:45:19,220 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:19,277 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:19,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:19,913 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:20,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:20,169 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:20,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20 WrapperNode [2019-11-06 22:45:20,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:20,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:20,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:20,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:20,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (1/1) ... [2019-11-06 22:45:20,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:20,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:20,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:20,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:20,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (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 22:45:20,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:20,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:20,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:20,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:20,397 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:22,048 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:22,049 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:22,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:22 BoogieIcfgContainer [2019-11-06 22:45:22,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:22,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:22,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:22,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:22,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:19" (1/3) ... [2019-11-06 22:45:22,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b44fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:22, skipping insertion in model container [2019-11-06 22:45:22,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:20" (2/3) ... [2019-11-06 22:45:22,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b44fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:22, skipping insertion in model container [2019-11-06 22:45:22,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:22" (3/3) ... [2019-11-06 22:45:22,060 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label06.c [2019-11-06 22:45:22,072 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:22,083 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:22,096 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:22,168 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:22,168 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:22,168 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:22,168 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:22,168 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:22,169 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:22,169 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:22,169 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 22:45:22,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:22,222 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 22:45:22,224 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1780384174, now seen corresponding path program 1 times [2019-11-06 22:45:22,246 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:22,246 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574069677] [2019-11-06 22:45:22,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:22,711 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 22:45:22,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574069677] [2019-11-06 22:45:22,712 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:22,713 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:45:22,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029400575] [2019-11-06 22:45:22,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:45:22,723 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:45:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:22,739 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:45:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:24,133 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-11-06 22:45:24,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:45:24,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-11-06 22:45:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:24,153 INFO L225 Difference]: With dead ends: 779 [2019-11-06 22:45:24,154 INFO L226 Difference]: Without dead ends: 425 [2019-11-06 22:45:24,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:45:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-06 22:45:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-11-06 22:45:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:45:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-11-06 22:45:24,268 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 69 [2019-11-06 22:45:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:24,269 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-11-06 22:45:24,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:45:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-11-06 22:45:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:45:24,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:24,277 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, 1, 1, 1, 1, 1] [2019-11-06 22:45:24,277 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1517741782, now seen corresponding path program 1 times [2019-11-06 22:45:24,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:24,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064017703] [2019-11-06 22:45:24,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:24,595 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 22:45:24,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064017703] [2019-11-06 22:45:24,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:24,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:45:24,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587922318] [2019-11-06 22:45:24,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:24,599 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:45:24,599 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 5 states. [2019-11-06 22:45:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:27,239 INFO L93 Difference]: Finished difference Result 1987 states and 3274 transitions. [2019-11-06 22:45:27,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:45:27,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-11-06 22:45:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:27,251 INFO L225 Difference]: With dead ends: 1987 [2019-11-06 22:45:27,251 INFO L226 Difference]: Without dead ends: 1573 [2019-11-06 22:45:27,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:45:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2019-11-06 22:45:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1184. [2019-11-06 22:45:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-11-06 22:45:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1836 transitions. [2019-11-06 22:45:27,320 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1836 transitions. Word has length 143 [2019-11-06 22:45:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:27,322 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1836 transitions. [2019-11-06 22:45:27,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1836 transitions. [2019-11-06 22:45:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 22:45:27,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:27,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:27,337 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1441313139, now seen corresponding path program 1 times [2019-11-06 22:45:27,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:27,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435403816] [2019-11-06 22:45:27,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:27,575 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 22:45:27,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435403816] [2019-11-06 22:45:27,576 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:27,576 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:45:27,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768167885] [2019-11-06 22:45:27,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:27,580 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:45:27,582 INFO L87 Difference]: Start difference. First operand 1184 states and 1836 transitions. Second operand 5 states. [2019-11-06 22:45:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:29,052 INFO L93 Difference]: Finished difference Result 2982 states and 4740 transitions. [2019-11-06 22:45:29,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:45:29,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-11-06 22:45:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:29,067 INFO L225 Difference]: With dead ends: 2982 [2019-11-06 22:45:29,068 INFO L226 Difference]: Without dead ends: 1804 [2019-11-06 22:45:29,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:45:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2019-11-06 22:45:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1394. [2019-11-06 22:45:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2019-11-06 22:45:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2125 transitions. [2019-11-06 22:45:29,153 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2125 transitions. Word has length 183 [2019-11-06 22:45:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:29,162 INFO L462 AbstractCegarLoop]: Abstraction has 1394 states and 2125 transitions. [2019-11-06 22:45:29,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2125 transitions. [2019-11-06 22:45:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 22:45:29,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:29,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:29,170 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1893235657, now seen corresponding path program 1 times [2019-11-06 22:45:29,171 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:29,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645181353] [2019-11-06 22:45:29,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:45:29,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645181353] [2019-11-06 22:45:29,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221172469] [2019-11-06 22:45:29,399 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 22:45:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:29,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:45:29,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:45:29,670 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:45:29,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:45:29,863 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:45:29,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786635022] [2019-11-06 22:45:29,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:29,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:45:29,865 INFO L87 Difference]: Start difference. First operand 1394 states and 2125 transitions. Second operand 5 states. [2019-11-06 22:45:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:31,526 INFO L93 Difference]: Finished difference Result 3591 states and 5631 transitions. [2019-11-06 22:45:31,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:45:31,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-11-06 22:45:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:31,540 INFO L225 Difference]: With dead ends: 3591 [2019-11-06 22:45:31,540 INFO L226 Difference]: Without dead ends: 2203 [2019-11-06 22:45:31,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:45:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2019-11-06 22:45:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2190. [2019-11-06 22:45:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2190 states. [2019-11-06 22:45:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3206 transitions. [2019-11-06 22:45:31,646 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3206 transitions. Word has length 234 [2019-11-06 22:45:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:31,646 INFO L462 AbstractCegarLoop]: Abstraction has 2190 states and 3206 transitions. [2019-11-06 22:45:31,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3206 transitions. [2019-11-06 22:45:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-11-06 22:45:31,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:31,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:31,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:31,856 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2140112339, now seen corresponding path program 1 times [2019-11-06 22:45:31,857 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:31,857 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100260878] [2019-11-06 22:45:31,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 124 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:45:32,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100260878] [2019-11-06 22:45:32,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143047867] [2019-11-06 22:45:32,065 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 22:45:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:32,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:45:32,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:45:32,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 22:45:32,382 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:45:32,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-11-06 22:45:32,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801342702] [2019-11-06 22:45:32,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:32,384 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:45:32,385 INFO L87 Difference]: Start difference. First operand 2190 states and 3206 transitions. Second operand 4 states. [2019-11-06 22:45:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:33,140 INFO L93 Difference]: Finished difference Result 4368 states and 6415 transitions. [2019-11-06 22:45:33,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:45:33,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2019-11-06 22:45:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:33,152 INFO L225 Difference]: With dead ends: 4368 [2019-11-06 22:45:33,152 INFO L226 Difference]: Without dead ends: 2184 [2019-11-06 22:45:33,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 507 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:45:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-11-06 22:45:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2184. [2019-11-06 22:45:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2019-11-06 22:45:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3188 transitions. [2019-11-06 22:45:33,225 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3188 transitions. Word has length 255 [2019-11-06 22:45:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:33,226 INFO L462 AbstractCegarLoop]: Abstraction has 2184 states and 3188 transitions. [2019-11-06 22:45:33,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3188 transitions. [2019-11-06 22:45:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-06 22:45:33,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:33,236 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:33,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:33,440 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1955526003, now seen corresponding path program 1 times [2019-11-06 22:45:33,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:33,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477199472] [2019-11-06 22:45:33,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-06 22:45:33,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477199472] [2019-11-06 22:45:33,687 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594575782] [2019-11-06 22:45:33,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:33,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:45:33,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-11-06 22:45:33,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 136 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-06 22:45:34,088 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:45:34,088 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:45:34,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431823583] [2019-11-06 22:45:34,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:45:34,089 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:45:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:45:34,089 INFO L87 Difference]: Start difference. First operand 2184 states and 3188 transitions. Second operand 5 states. [2019-11-06 22:45:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:35,665 INFO L93 Difference]: Finished difference Result 5788 states and 8780 transitions. [2019-11-06 22:45:35,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:35,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-11-06 22:45:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:35,692 INFO L225 Difference]: With dead ends: 5788 [2019-11-06 22:45:35,692 INFO L226 Difference]: Without dead ends: 3610 [2019-11-06 22:45:35,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:45:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2019-11-06 22:45:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3378. [2019-11-06 22:45:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2019-11-06 22:45:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 4918 transitions. [2019-11-06 22:45:35,820 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 4918 transitions. Word has length 304 [2019-11-06 22:45:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:35,821 INFO L462 AbstractCegarLoop]: Abstraction has 3378 states and 4918 transitions. [2019-11-06 22:45:35,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:45:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 4918 transitions. [2019-11-06 22:45:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-06 22:45:35,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:35,832 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:36,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:36,038 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1610214185, now seen corresponding path program 1 times [2019-11-06 22:45:36,039 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:36,039 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035825902] [2019-11-06 22:45:36,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 22:45:36,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035825902] [2019-11-06 22:45:36,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322092676] [2019-11-06 22:45:36,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:36,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:45:36,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:45:36,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 262 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 22:45:36,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [484260505] [2019-11-06 22:45:36,765 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 307 [2019-11-06 22:45:36,819 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:36,819 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)