/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:48:06,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:48:06,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:48:06,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:48:06,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:48:06,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:48:06,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:48:06,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:48:06,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:48:06,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:48:06,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:48:06,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:48:06,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:48:06,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:48:06,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:48:06,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:48:06,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:48:06,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:48:06,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:48:06,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:48:06,711 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 22:48:06,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:48:06,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:48:06,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:48:06,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:48:06,727 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:48:06,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:48:06,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:48:06,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:48:06,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:48:06,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:48:06,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:48:06,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:48:06,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:48:06,729 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:48:06,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:48:06,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:48:06,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:48:06,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:48:06,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:48:06,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:48:06,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:48:06,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:48:06,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:48:06,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:48:06,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:48:06,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:48:06,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:48:06,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:48:06,731 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 22:48:06,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:48:06,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:48:06,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:48:06,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:48:06,995 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:48:06,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-11-06 22:48:07,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ac58a75/9e807dfe51924bfabb3011178117d427/FLAGe333e9148 [2019-11-06 22:48:07,674 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:48:07,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-11-06 22:48:07,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ac58a75/9e807dfe51924bfabb3011178117d427/FLAGe333e9148 [2019-11-06 22:48:07,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ac58a75/9e807dfe51924bfabb3011178117d427 [2019-11-06 22:48:07,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:48:07,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:48:07,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:07,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:48:07,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:48:07,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:07" (1/1) ... [2019-11-06 22:48:07,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4170af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:07, skipping insertion in model container [2019-11-06 22:48:07,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:07" (1/1) ... [2019-11-06 22:48:07,942 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:48:07,998 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:48:08,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:08,609 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:48:08,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:08,832 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:48:08,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08 WrapperNode [2019-11-06 22:48:08,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:08,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:48:08,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:48:08,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:48:08,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:08,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:08,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:08,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:08,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:09,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:09,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (1/1) ... [2019-11-06 22:48:09,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:48:09,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:48:09,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:48:09,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:48:09,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (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 22:48:09,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:48:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:48:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:48:09,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:48:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:48:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:48:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:48:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:48:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:48:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:48:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:48:11,123 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:48:11,124 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:48:11,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:11 BoogieIcfgContainer [2019-11-06 22:48:11,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:48:11,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:48:11,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:48:11,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:48:11,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:07" (1/3) ... [2019-11-06 22:48:11,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6561c00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:11, skipping insertion in model container [2019-11-06 22:48:11,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:08" (2/3) ... [2019-11-06 22:48:11,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6561c00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:11, skipping insertion in model container [2019-11-06 22:48:11,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:11" (3/3) ... [2019-11-06 22:48:11,135 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2019-11-06 22:48:11,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:48:11,154 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:48:11,165 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:48:11,195 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:48:11,195 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:48:11,195 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:48:11,195 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:48:11,196 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:48:11,196 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:48:11,196 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:48:11,196 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:48:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:48:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:48:11,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:11,277 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] [2019-11-06 22:48:11,279 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:11,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1043442102, now seen corresponding path program 1 times [2019-11-06 22:48:11,297 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:11,297 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120676021] [2019-11-06 22:48:11,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:11,610 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 22:48:11,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120676021] [2019-11-06 22:48:11,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:11,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:11,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780719133] [2019-11-06 22:48:11,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:11,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:11,636 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:48:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:13,760 INFO L93 Difference]: Finished difference Result 994 states and 1776 transitions. [2019-11-06 22:48:13,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:13,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-06 22:48:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:13,792 INFO L225 Difference]: With dead ends: 994 [2019-11-06 22:48:13,792 INFO L226 Difference]: Without dead ends: 620 [2019-11-06 22:48:13,806 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 22:48:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-06 22:48:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 614. [2019-11-06 22:48:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-06 22:48:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 908 transitions. [2019-11-06 22:48:13,899 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 908 transitions. Word has length 43 [2019-11-06 22:48:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:13,900 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 908 transitions. [2019-11-06 22:48:13,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 908 transitions. [2019-11-06 22:48:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:48:13,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:13,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:13,907 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2051275321, now seen corresponding path program 1 times [2019-11-06 22:48:13,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:13,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108021597] [2019-11-06 22:48:13,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:14,092 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108021597] [2019-11-06 22:48:14,092 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:14,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:14,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459061321] [2019-11-06 22:48:14,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:14,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:14,096 INFO L87 Difference]: Start difference. First operand 614 states and 908 transitions. Second operand 4 states. [2019-11-06 22:48:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:15,828 INFO L93 Difference]: Finished difference Result 2367 states and 3579 transitions. [2019-11-06 22:48:15,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:15,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-11-06 22:48:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:15,843 INFO L225 Difference]: With dead ends: 2367 [2019-11-06 22:48:15,844 INFO L226 Difference]: Without dead ends: 1759 [2019-11-06 22:48:15,846 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 22:48:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2019-11-06 22:48:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1183. [2019-11-06 22:48:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-11-06 22:48:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1681 transitions. [2019-11-06 22:48:15,914 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1681 transitions. Word has length 116 [2019-11-06 22:48:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:15,915 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1681 transitions. [2019-11-06 22:48:15,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1681 transitions. [2019-11-06 22:48:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:48:15,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:15,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:15,927 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash -442913762, now seen corresponding path program 1 times [2019-11-06 22:48:15,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:15,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979815294] [2019-11-06 22:48:15,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:16,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979815294] [2019-11-06 22:48:16,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:16,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:16,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717471662] [2019-11-06 22:48:16,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:16,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:16,158 INFO L87 Difference]: Start difference. First operand 1183 states and 1681 transitions. Second operand 6 states. [2019-11-06 22:48:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:18,672 INFO L93 Difference]: Finished difference Result 3648 states and 5882 transitions. [2019-11-06 22:48:18,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:48:18,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-06 22:48:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:18,694 INFO L225 Difference]: With dead ends: 3648 [2019-11-06 22:48:18,694 INFO L226 Difference]: Without dead ends: 2471 [2019-11-06 22:48:18,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:48:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-06 22:48:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2397. [2019-11-06 22:48:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2019-11-06 22:48:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3442 transitions. [2019-11-06 22:48:18,798 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3442 transitions. Word has length 141 [2019-11-06 22:48:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:18,799 INFO L462 AbstractCegarLoop]: Abstraction has 2397 states and 3442 transitions. [2019-11-06 22:48:18,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3442 transitions. [2019-11-06 22:48:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-06 22:48:18,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:18,806 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:18,806 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1861817831, now seen corresponding path program 1 times [2019-11-06 22:48:18,807 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:18,807 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719321863] [2019-11-06 22:48:18,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:48:19,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719321863] [2019-11-06 22:48:19,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717719066] [2019-11-06 22:48:19,045 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 22:48:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:19,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:48:19,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:48:19,319 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:48:19,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:48:19,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:48:19,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868468658] [2019-11-06 22:48:19,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:48:19,452 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:19,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:48:19,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:48:19,453 INFO L87 Difference]: Start difference. First operand 2397 states and 3442 transitions. Second operand 5 states. [2019-11-06 22:48:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:21,173 INFO L93 Difference]: Finished difference Result 7053 states and 11357 transitions. [2019-11-06 22:48:21,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:48:21,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2019-11-06 22:48:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:21,205 INFO L225 Difference]: With dead ends: 7053 [2019-11-06 22:48:21,205 INFO L226 Difference]: Without dead ends: 4662 [2019-11-06 22:48:21,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 404 SyntacticMatches, 1 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 22:48:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2019-11-06 22:48:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4579. [2019-11-06 22:48:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2019-11-06 22:48:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6749 transitions. [2019-11-06 22:48:21,410 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6749 transitions. Word has length 204 [2019-11-06 22:48:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:21,412 INFO L462 AbstractCegarLoop]: Abstraction has 4579 states and 6749 transitions. [2019-11-06 22:48:21,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:48:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6749 transitions. [2019-11-06 22:48:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-06 22:48:21,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:21,421 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:21,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:21,626 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1031566485, now seen corresponding path program 1 times [2019-11-06 22:48:21,627 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:21,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336384380] [2019-11-06 22:48:21,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:21,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336384380] [2019-11-06 22:48:21,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697931907] [2019-11-06 22:48:21,871 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 22:48:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:21,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:48:22,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:48:22,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:48:22,110 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:48:22,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:48:22,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470828984] [2019-11-06 22:48:22,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:48:22,113 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:48:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:48:22,113 INFO L87 Difference]: Start difference. First operand 4579 states and 6749 transitions. Second operand 3 states. [2019-11-06 22:48:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:23,294 INFO L93 Difference]: Finished difference Result 10692 states and 16111 transitions. [2019-11-06 22:48:23,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:48:23,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2019-11-06 22:48:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:23,327 INFO L225 Difference]: With dead ends: 10692 [2019-11-06 22:48:23,327 INFO L226 Difference]: Without dead ends: 6307 [2019-11-06 22:48:23,343 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:48:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2019-11-06 22:48:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 6300. [2019-11-06 22:48:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2019-11-06 22:48:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9168 transitions. [2019-11-06 22:48:23,517 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9168 transitions. Word has length 218 [2019-11-06 22:48:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:23,518 INFO L462 AbstractCegarLoop]: Abstraction has 6300 states and 9168 transitions. [2019-11-06 22:48:23,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:48:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9168 transitions. [2019-11-06 22:48:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 22:48:23,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:23,527 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:23,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:23,731 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1069896338, now seen corresponding path program 1 times [2019-11-06 22:48:23,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:23,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613363003] [2019-11-06 22:48:23,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 106 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:24,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613363003] [2019-11-06 22:48:24,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803004865] [2019-11-06 22:48:24,354 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 22:48:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:24,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:48:24,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:24,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 22:48:24,569 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:24,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:24,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:24,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:48:25,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:48:25,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 20 [2019-11-06 22:48:25,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073939638] [2019-11-06 22:48:25,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:48:25,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:25,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:48:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-11-06 22:48:25,004 INFO L87 Difference]: Start difference. First operand 6300 states and 9168 transitions. Second operand 5 states. [2019-11-06 22:48:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:26,733 INFO L93 Difference]: Finished difference Result 12461 states and 18339 transitions. [2019-11-06 22:48:26,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:48:26,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2019-11-06 22:48:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:26,767 INFO L225 Difference]: With dead ends: 12461 [2019-11-06 22:48:26,767 INFO L226 Difference]: Without dead ends: 6355 [2019-11-06 22:48:26,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:48:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2019-11-06 22:48:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6340. [2019-11-06 22:48:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6340 states. [2019-11-06 22:48:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 9306 transitions. [2019-11-06 22:48:26,968 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 9306 transitions. Word has length 225 [2019-11-06 22:48:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:26,969 INFO L462 AbstractCegarLoop]: Abstraction has 6340 states and 9306 transitions. [2019-11-06 22:48:26,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:48:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 9306 transitions. [2019-11-06 22:48:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-11-06 22:48:26,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:26,977 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:27,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:27,181 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1349983275, now seen corresponding path program 1 times [2019-11-06 22:48:27,183 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:27,183 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633169934] [2019-11-06 22:48:27,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:48:27,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633169934] [2019-11-06 22:48:27,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:27,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:27,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368278329] [2019-11-06 22:48:27,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:27,347 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:27,348 INFO L87 Difference]: Start difference. First operand 6340 states and 9306 transitions. Second operand 4 states. [2019-11-06 22:48:29,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:29,398 INFO L93 Difference]: Finished difference Result 16152 states and 24692 transitions. [2019-11-06 22:48:29,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:29,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2019-11-06 22:48:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:29,479 INFO L225 Difference]: With dead ends: 16152 [2019-11-06 22:48:29,479 INFO L226 Difference]: Without dead ends: 10006 [2019-11-06 22:48:29,513 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 22:48:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2019-11-06 22:48:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9421. [2019-11-06 22:48:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9421 states. [2019-11-06 22:48:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9421 states to 9421 states and 13722 transitions. [2019-11-06 22:48:29,837 INFO L78 Accepts]: Start accepts. Automaton has 9421 states and 13722 transitions. Word has length 260 [2019-11-06 22:48:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:29,837 INFO L462 AbstractCegarLoop]: Abstraction has 9421 states and 13722 transitions. [2019-11-06 22:48:29,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9421 states and 13722 transitions. [2019-11-06 22:48:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-11-06 22:48:29,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:29,847 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:29,848 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash -706378899, now seen corresponding path program 1 times [2019-11-06 22:48:29,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:29,851 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667615600] [2019-11-06 22:48:29,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 22:48:30,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667615600] [2019-11-06 22:48:30,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313327305] [2019-11-06 22:48:30,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:48:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:30,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:48:30,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:30,659 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:30,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1722537164] [2019-11-06 22:48:30,845 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 270 [2019-11-06 22:48:30,907 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:48:30,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)