/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/Problem16_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:28,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:28,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:28,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:28,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:28,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:28,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:28,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:28,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:28,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:28,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:28,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:28,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:28,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:28,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:28,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:28,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:28,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:28,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:28,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:28,367 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 22:55:28,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:28,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:28,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:28,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:28,384 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:28,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:28,385 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:28,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:28,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:28,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:28,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:28,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:28,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:28,386 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:28,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:28,386 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:28,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:28,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:28,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:28,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:28,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:28,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:28,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:28,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:28,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:28,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:28,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:28,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:28,389 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 22:55:28,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:28,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:28,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:28,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:28,735 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:28,735 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-11-06 22:55:28,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc5c624b/6852cddce3e9408796d1456f76dd3779/FLAG77d5766a4 [2019-11-06 22:55:29,448 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:29,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label42.c [2019-11-06 22:55:29,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc5c624b/6852cddce3e9408796d1456f76dd3779/FLAG77d5766a4 [2019-11-06 22:55:29,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc5c624b/6852cddce3e9408796d1456f76dd3779 [2019-11-06 22:55:29,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:29,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:29,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:29,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:29,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:29,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:29" (1/1) ... [2019-11-06 22:55:29,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fac17dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:29, skipping insertion in model container [2019-11-06 22:55:29,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:29" (1/1) ... [2019-11-06 22:55:29,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:29,736 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:30,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:30,689 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:31,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:31,024 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:31,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31 WrapperNode [2019-11-06 22:55:31,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:31,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:31,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:31,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:31,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (1/1) ... [2019-11-06 22:55:31,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:31,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:31,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:31,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:31,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (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 22:55:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:33,606 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:33,606 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:33,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:33 BoogieIcfgContainer [2019-11-06 22:55:33,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:33,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:33,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:33,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:33,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:29" (1/3) ... [2019-11-06 22:55:33,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2b7d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:33, skipping insertion in model container [2019-11-06 22:55:33,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:31" (2/3) ... [2019-11-06 22:55:33,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2b7d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:33, skipping insertion in model container [2019-11-06 22:55:33,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:33" (3/3) ... [2019-11-06 22:55:33,631 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label42.c [2019-11-06 22:55:33,650 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:33,662 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:33,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:33,719 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:33,720 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:33,720 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:33,720 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:33,720 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:33,720 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:33,720 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:33,720 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 22:55:33,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:33,776 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] [2019-11-06 22:55:33,778 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1984606347, now seen corresponding path program 1 times [2019-11-06 22:55:33,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:33,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803776729] [2019-11-06 22:55:33,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:34,269 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 22:55:34,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803776729] [2019-11-06 22:55:34,270 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:34,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:34,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528308706] [2019-11-06 22:55:34,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:34,280 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:34,300 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:36,739 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:36,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:36,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-11-06 22:55:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:36,763 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:36,763 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:36,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:55:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:55:36,872 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 68 [2019-11-06 22:55:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:36,872 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:55:36,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:55:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:55:36,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:36,882 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:36,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1599900728, now seen corresponding path program 1 times [2019-11-06 22:55:36,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:36,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957496182] [2019-11-06 22:55:36,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:37,208 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957496182] [2019-11-06 22:55:37,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:37,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:37,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785720933] [2019-11-06 22:55:37,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:37,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:37,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:37,213 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:55:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:39,911 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:55:39,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:39,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-11-06 22:55:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:39,922 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:55:39,923 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:55:39,926 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 22:55:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:55:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:55:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:55:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:55:40,025 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 160 [2019-11-06 22:55:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:40,026 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:55:40,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:55:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-11-06 22:55:40,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:40,034 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:40,034 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1250648855, now seen corresponding path program 1 times [2019-11-06 22:55:40,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:40,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26038835] [2019-11-06 22:55:40,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 122 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:40,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26038835] [2019-11-06 22:55:40,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680805923] [2019-11-06 22:55:40,296 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 22:55:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:40,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:40,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-06 22:55:40,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 122 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:40,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:40,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:40,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178130500] [2019-11-06 22:55:40,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:40,857 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:40,858 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:55:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:43,635 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:55:43,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:43,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2019-11-06 22:55:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:43,649 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:55:43,649 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:55:43,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:55:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:55:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:55:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:55:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 270 [2019-11-06 22:55:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:43,715 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:55:43,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:55:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-11-06 22:55:43,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:43,726 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, 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, 1, 1, 1, 1, 1, 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 22:55:43,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:43,932 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2015047681, now seen corresponding path program 1 times [2019-11-06 22:55:43,933 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:43,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878653654] [2019-11-06 22:55:43,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 183 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:44,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878653654] [2019-11-06 22:55:44,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119969783] [2019-11-06 22:55:44,300 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 22:55:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:44,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:44,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 22:55:44,715 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 183 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:44,914 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:44,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:55:44,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639706505] [2019-11-06 22:55:44,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:44,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:44,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:44,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:55:44,917 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:55:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:48,900 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-11-06 22:55:48,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:55:48,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2019-11-06 22:55:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:48,923 INFO L225 Difference]: With dead ends: 4241 [2019-11-06 22:55:48,923 INFO L226 Difference]: Without dead ends: 2859 [2019-11-06 22:55:48,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 688 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:55:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-11-06 22:55:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-11-06 22:55:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:55:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-11-06 22:55:49,007 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 345 [2019-11-06 22:55:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:49,007 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-11-06 22:55:49,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-11-06 22:55:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-11-06 22:55:49,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:49,016 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, 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, 1, 1, 1, 1, 1, 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 22:55:49,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:49,222 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash 989447607, now seen corresponding path program 1 times [2019-11-06 22:55:49,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:49,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259416637] [2019-11-06 22:55:49,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 183 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:49,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259416637] [2019-11-06 22:55:49,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959356181] [2019-11-06 22:55:49,709 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 22:55:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:49,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:49,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 22:55:49,954 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 183 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:50,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:50,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:50,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202943792] [2019-11-06 22:55:50,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:50,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:50,158 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-11-06 22:55:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:53,059 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-11-06 22:55:53,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:55:53,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2019-11-06 22:55:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:53,091 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:55:53,092 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:55:53,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 693 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:55:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:55:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:55:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-11-06 22:55:53,274 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 349 [2019-11-06 22:55:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:53,275 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-11-06 22:55:53,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-11-06 22:55:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2019-11-06 22:55:53,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:53,292 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:53,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:53,496 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1448875587, now seen corresponding path program 1 times [2019-11-06 22:55:53,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:53,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805422678] [2019-11-06 22:55:53,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:54,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805422678] [2019-11-06 22:55:54,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204915257] [2019-11-06 22:55:54,978 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 22:55:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:55,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:55,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:55,283 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:55,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [732502090] [2019-11-06 22:55:55,648 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 375 [2019-11-06 22:55:55,724 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:55,724 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:00,228 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.