/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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:31,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:31,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:31,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:31,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:31,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:31,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:31,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:31,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:31,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:31,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:31,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:31,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:31,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:31,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:31,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:31,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:31,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:31,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:31,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:31,137 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 22:46:31,173 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:31,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:31,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:31,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:31,178 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:31,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:31,179 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:31,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:31,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:31,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:31,180 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:31,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:31,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:31,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:31,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:31,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:31,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:31,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:31,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:31,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:31,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:31,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:31,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:31,183 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 22:46:31,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:31,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:31,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:31,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:31,535 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:31,536 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-11-06 22:46:31,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098e52d3/4226e4048ee7466ebacc5441d32868f8/FLAG41880571c [2019-11-06 22:46:32,169 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:32,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-11-06 22:46:32,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098e52d3/4226e4048ee7466ebacc5441d32868f8/FLAG41880571c [2019-11-06 22:46:32,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7098e52d3/4226e4048ee7466ebacc5441d32868f8 [2019-11-06 22:46:32,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:32,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:32,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:32,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:32,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:32,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2019-11-06 22:46:32,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63110a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:32, skipping insertion in model container [2019-11-06 22:46:32,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:32" (1/1) ... [2019-11-06 22:46:32,408 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:32,478 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:33,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:33,289 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:33,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:33,533 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:33,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33 WrapperNode [2019-11-06 22:46:33,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:33,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:33,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:33,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:33,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (1/1) ... [2019-11-06 22:46:33,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:33,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:33,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:33,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:33,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (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 22:46:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:33,757 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:33,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:35,472 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:35,472 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:35,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:35 BoogieIcfgContainer [2019-11-06 22:46:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:35,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:35,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:35,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:35,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:32" (1/3) ... [2019-11-06 22:46:35,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116f7a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:35, skipping insertion in model container [2019-11-06 22:46:35,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:33" (2/3) ... [2019-11-06 22:46:35,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116f7a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:35, skipping insertion in model container [2019-11-06 22:46:35,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:35" (3/3) ... [2019-11-06 22:46:35,483 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label27.c [2019-11-06 22:46:35,494 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:35,504 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:35,516 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:35,546 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:35,546 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:35,547 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:35,547 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:35,547 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:35,547 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:35,547 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:35,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 22:46:35,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:35,584 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] [2019-11-06 22:46:35,586 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1647483275, now seen corresponding path program 1 times [2019-11-06 22:46:35,603 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:35,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399418315] [2019-11-06 22:46:35,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:35,976 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 22:46:35,976 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399418315] [2019-11-06 22:46:35,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:35,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:35,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341570705] [2019-11-06 22:46:35,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:35,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:36,002 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:46:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:38,310 INFO L93 Difference]: Finished difference Result 992 states and 1772 transitions. [2019-11-06 22:46:38,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:38,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-11-06 22:46:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:38,337 INFO L225 Difference]: With dead ends: 992 [2019-11-06 22:46:38,337 INFO L226 Difference]: Without dead ends: 618 [2019-11-06 22:46:38,351 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 22:46:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-06 22:46:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 419. [2019-11-06 22:46:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:46:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 604 transitions. [2019-11-06 22:46:38,443 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 604 transitions. Word has length 48 [2019-11-06 22:46:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:38,444 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 604 transitions. [2019-11-06 22:46:38,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 604 transitions. [2019-11-06 22:46:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:46:38,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:38,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:38,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2032953802, now seen corresponding path program 1 times [2019-11-06 22:46:38,451 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:38,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210200010] [2019-11-06 22:46:38,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:38,666 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210200010] [2019-11-06 22:46:38,666 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:38,666 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:46:38,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324441250] [2019-11-06 22:46:38,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:38,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:46:38,672 INFO L87 Difference]: Start difference. First operand 419 states and 604 transitions. Second operand 6 states. [2019-11-06 22:46:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:40,122 INFO L93 Difference]: Finished difference Result 1236 states and 1811 transitions. [2019-11-06 22:46:40,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:40,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-11-06 22:46:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:40,130 INFO L225 Difference]: With dead ends: 1236 [2019-11-06 22:46:40,130 INFO L226 Difference]: Without dead ends: 823 [2019-11-06 22:46:40,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2019-11-06 22:46:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 808. [2019-11-06 22:46:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-11-06 22:46:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1155 transitions. [2019-11-06 22:46:40,173 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1155 transitions. Word has length 120 [2019-11-06 22:46:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:40,174 INFO L462 AbstractCegarLoop]: Abstraction has 808 states and 1155 transitions. [2019-11-06 22:46:40,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:46:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1155 transitions. [2019-11-06 22:46:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:46:40,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:40,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:40,186 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash 664653149, now seen corresponding path program 1 times [2019-11-06 22:46:40,187 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:40,187 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827216733] [2019-11-06 22:46:40,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:40,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827216733] [2019-11-06 22:46:40,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:40,381 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:40,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131370655] [2019-11-06 22:46:40,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:40,382 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:40,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:40,383 INFO L87 Difference]: Start difference. First operand 808 states and 1155 transitions. Second operand 4 states. [2019-11-06 22:46:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:42,133 INFO L93 Difference]: Finished difference Result 2390 states and 3458 transitions. [2019-11-06 22:46:42,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:42,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-11-06 22:46:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:42,143 INFO L225 Difference]: With dead ends: 2390 [2019-11-06 22:46:42,143 INFO L226 Difference]: Without dead ends: 1588 [2019-11-06 22:46:42,145 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 22:46:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2019-11-06 22:46:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1382. [2019-11-06 22:46:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2019-11-06 22:46:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1925 transitions. [2019-11-06 22:46:42,196 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1925 transitions. Word has length 121 [2019-11-06 22:46:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:42,197 INFO L462 AbstractCegarLoop]: Abstraction has 1382 states and 1925 transitions. [2019-11-06 22:46:42,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1925 transitions. [2019-11-06 22:46:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:46:42,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:42,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:42,202 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1062949639, now seen corresponding path program 1 times [2019-11-06 22:46:42,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:42,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081093888] [2019-11-06 22:46:42,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:42,387 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081093888] [2019-11-06 22:46:42,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:42,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:46:42,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553647370] [2019-11-06 22:46:42,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:42,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:46:42,390 INFO L87 Difference]: Start difference. First operand 1382 states and 1925 transitions. Second operand 5 states. [2019-11-06 22:46:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:44,109 INFO L93 Difference]: Finished difference Result 3988 states and 5881 transitions. [2019-11-06 22:46:44,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:46:44,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-11-06 22:46:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:44,125 INFO L225 Difference]: With dead ends: 3988 [2019-11-06 22:46:44,125 INFO L226 Difference]: Without dead ends: 2612 [2019-11-06 22:46:44,130 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 22:46:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2019-11-06 22:46:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2572. [2019-11-06 22:46:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2572 states. [2019-11-06 22:46:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3448 transitions. [2019-11-06 22:46:44,237 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3448 transitions. Word has length 123 [2019-11-06 22:46:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:44,239 INFO L462 AbstractCegarLoop]: Abstraction has 2572 states and 3448 transitions. [2019-11-06 22:46:44,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3448 transitions. [2019-11-06 22:46:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-06 22:46:44,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:44,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:46:44,248 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 669937364, now seen corresponding path program 1 times [2019-11-06 22:46:44,249 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:44,250 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601138] [2019-11-06 22:46:44,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:44,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601138] [2019-11-06 22:46:44,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986840189] [2019-11-06 22:46:44,559 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 22:46:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:44,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:46:44,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:44,777 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:44,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:44,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-06 22:46:44,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754844628] [2019-11-06 22:46:44,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:44,899 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:44,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:44,902 INFO L87 Difference]: Start difference. First operand 2572 states and 3448 transitions. Second operand 3 states. [2019-11-06 22:46:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:46,076 INFO L93 Difference]: Finished difference Result 6311 states and 8689 transitions. [2019-11-06 22:46:46,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:46,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2019-11-06 22:46:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:46,102 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 22:46:46,103 INFO L226 Difference]: Without dead ends: 3745 [2019-11-06 22:46:46,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2019-11-06 22:46:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3742. [2019-11-06 22:46:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2019-11-06 22:46:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5043 transitions. [2019-11-06 22:46:46,219 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5043 transitions. Word has length 179 [2019-11-06 22:46:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:46,220 INFO L462 AbstractCegarLoop]: Abstraction has 3742 states and 5043 transitions. [2019-11-06 22:46:46,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5043 transitions. [2019-11-06 22:46:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 22:46:46,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:46,226 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:46,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:46,440 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash -596928914, now seen corresponding path program 1 times [2019-11-06 22:46:46,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:46,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145569355] [2019-11-06 22:46:46,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:46,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145569355] [2019-11-06 22:46:46,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733189246] [2019-11-06 22:46:46,801 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 22:46:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:46,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:46:46,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:46:46,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:46:47,048 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:47,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:46:47,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411568892] [2019-11-06 22:46:47,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:47,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:47,051 INFO L87 Difference]: Start difference. First operand 3742 states and 5043 transitions. Second operand 3 states. [2019-11-06 22:46:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:48,197 INFO L93 Difference]: Finished difference Result 9576 states and 13285 transitions. [2019-11-06 22:46:48,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:48,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-11-06 22:46:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:48,231 INFO L225 Difference]: With dead ends: 9576 [2019-11-06 22:46:48,231 INFO L226 Difference]: Without dead ends: 5840 [2019-11-06 22:46:48,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2019-11-06 22:46:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5652. [2019-11-06 22:46:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5652 states. [2019-11-06 22:46:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 7540 transitions. [2019-11-06 22:46:48,380 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 7540 transitions. Word has length 205 [2019-11-06 22:46:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:48,384 INFO L462 AbstractCegarLoop]: Abstraction has 5652 states and 7540 transitions. [2019-11-06 22:46:48,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 7540 transitions. [2019-11-06 22:46:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-06 22:46:48,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:48,391 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:48,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:48,601 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:48,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1919024346, now seen corresponding path program 1 times [2019-11-06 22:46:48,602 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:48,602 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944456961] [2019-11-06 22:46:48,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 22:46:48,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944456961] [2019-11-06 22:46:48,722 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:48,722 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:48,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116426231] [2019-11-06 22:46:48,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:48,723 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:48,724 INFO L87 Difference]: Start difference. First operand 5652 states and 7540 transitions. Second operand 3 states. [2019-11-06 22:46:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:49,799 INFO L93 Difference]: Finished difference Result 13766 states and 19030 transitions. [2019-11-06 22:46:49,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:49,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-11-06 22:46:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:49,839 INFO L225 Difference]: With dead ends: 13766 [2019-11-06 22:46:49,840 INFO L226 Difference]: Without dead ends: 8120 [2019-11-06 22:46:49,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 22:46:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2019-11-06 22:46:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7744. [2019-11-06 22:46:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7744 states. [2019-11-06 22:46:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7744 states to 7744 states and 10330 transitions. [2019-11-06 22:46:50,105 INFO L78 Accepts]: Start accepts. Automaton has 7744 states and 10330 transitions. Word has length 209 [2019-11-06 22:46:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:50,106 INFO L462 AbstractCegarLoop]: Abstraction has 7744 states and 10330 transitions. [2019-11-06 22:46:50,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7744 states and 10330 transitions. [2019-11-06 22:46:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-11-06 22:46:50,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:50,117 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:50,118 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1121364656, now seen corresponding path program 1 times [2019-11-06 22:46:50,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:50,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609753463] [2019-11-06 22:46:50,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:50,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609753463] [2019-11-06 22:46:50,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064444586] [2019-11-06 22:46:50,343 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 22:46:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:50,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:46:50,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:50,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:50,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [334237385] [2019-11-06 22:46:50,774 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 246 [2019-11-06 22:46:50,832 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:46:50,833 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)