/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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:06,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:06,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:06,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:56:06,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:56:06,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:56:06,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:56:06,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:56:06,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:56:06,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:56:06,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:56:06,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:56:06,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:06,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:06,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:06,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:06,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:06,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:06,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:06,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:06,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:06,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:06,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:06,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:06,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:06,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:06,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:06,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:06,963 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 22:56:06,984 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:06,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:06,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:06,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:06,987 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:06,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:06,988 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:06,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:06,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:06,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:06,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:06,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:06,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:06,990 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:06,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:06,990 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:06,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:06,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:06,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:06,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:06,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:06,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:06,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:06,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:06,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:06,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:06,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:06,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:06,993 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 22:56:07,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:07,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:07,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:07,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:07,292 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:07,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-11-06 22:56:07,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fd21c32/aad18923ef7844f2be2ce65bc95703e4/FLAG0867a4908 [2019-11-06 22:56:08,035 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:08,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-11-06 22:56:08,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fd21c32/aad18923ef7844f2be2ce65bc95703e4/FLAG0867a4908 [2019-11-06 22:56:08,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fd21c32/aad18923ef7844f2be2ce65bc95703e4 [2019-11-06 22:56:08,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:08,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:08,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:08,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:08,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:08,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:08" (1/1) ... [2019-11-06 22:56:08,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b778097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:08, skipping insertion in model container [2019-11-06 22:56:08,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:08" (1/1) ... [2019-11-06 22:56:08,243 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:08,330 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:09,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:09,132 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:09,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:09,364 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:09,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09 WrapperNode [2019-11-06 22:56:09,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:09,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:09,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:09,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:09,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (1/1) ... [2019-11-06 22:56:09,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:09,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:09,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:09,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:09,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (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 22:56:09,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:09,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:09,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:09,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:09,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:09,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:09,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:12,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:12,261 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:12,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:12 BoogieIcfgContainer [2019-11-06 22:56:12,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:12,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:12,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:12,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:12,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:08" (1/3) ... [2019-11-06 22:56:12,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bdec9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:12, skipping insertion in model container [2019-11-06 22:56:12,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:09" (2/3) ... [2019-11-06 22:56:12,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bdec9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:12, skipping insertion in model container [2019-11-06 22:56:12,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:12" (3/3) ... [2019-11-06 22:56:12,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-11-06 22:56:12,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:12,315 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:12,330 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:12,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:12,381 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:12,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:12,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:12,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:12,382 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:12,382 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:12,382 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 22:56:12,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:12,430 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] [2019-11-06 22:56:12,432 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 10915389, now seen corresponding path program 1 times [2019-11-06 22:56:12,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:12,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799414296] [2019-11-06 22:56:12,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:12,857 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 22:56:12,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799414296] [2019-11-06 22:56:12,859 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:12,859 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:12,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578399436] [2019-11-06 22:56:12,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:12,870 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:12,893 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:56:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:15,377 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:56:15,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:15,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-11-06 22:56:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:15,432 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:56:15,433 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:56:15,447 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 22:56:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:56:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:56:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:56:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:56:15,597 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 46 [2019-11-06 22:56:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:15,598 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:56:15,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:56:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:56:15,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:15,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:15,614 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1929780272, now seen corresponding path program 1 times [2019-11-06 22:56:15,615 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:15,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041502895] [2019-11-06 22:56:15,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:15,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041502895] [2019-11-06 22:56:15,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:15,928 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:15,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376990071] [2019-11-06 22:56:15,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:15,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:15,931 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:56:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:18,612 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:56:18,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:18,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-11-06 22:56:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:18,621 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:56:18,621 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:56:18,624 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 22:56:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:56:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:56:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:56:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:56:18,661 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 138 [2019-11-06 22:56:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:18,662 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:56:18,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:56:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-06 22:56:18,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:18,669 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:56:18,670 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1919775263, now seen corresponding path program 1 times [2019-11-06 22:56:18,671 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:18,671 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167126454] [2019-11-06 22:56:18,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:18,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167126454] [2019-11-06 22:56:18,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881998650] [2019-11-06 22:56:18,927 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 22:56:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:19,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:19,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 22:56:19,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:19,510 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:19,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:19,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133357320] [2019-11-06 22:56:19,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:19,520 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:19,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:19,521 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:56:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:22,047 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:56:22,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:22,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2019-11-06 22:56:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:22,058 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:56:22,059 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:56:22,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 491 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 22:56:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:56:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:56:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:56:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:56:22,116 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 248 [2019-11-06 22:56:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:22,117 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:56:22,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:56:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-11-06 22:56:22,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:22,127 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 22:56:22,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:22,332 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 68738983, now seen corresponding path program 1 times [2019-11-06 22:56:22,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:22,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250282050] [2019-11-06 22:56:22,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 117 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:22,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250282050] [2019-11-06 22:56:22,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536895697] [2019-11-06 22:56:22,604 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 22:56:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:22,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:22,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-06 22:56:22,886 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 117 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:23,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:23,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:56:23,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76085373] [2019-11-06 22:56:23,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:23,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:23,050 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:56:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:28,398 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-11-06 22:56:28,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:28,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2019-11-06 22:56:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:28,417 INFO L225 Difference]: With dead ends: 4241 [2019-11-06 22:56:28,418 INFO L226 Difference]: Without dead ends: 2859 [2019-11-06 22:56:28,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 644 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 22:56:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-11-06 22:56:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-11-06 22:56:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:56:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-11-06 22:56:28,555 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 323 [2019-11-06 22:56:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:28,555 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-11-06 22:56:28,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-11-06 22:56:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-11-06 22:56:28,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:28,562 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 22:56:28,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:28,774 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash 802856799, now seen corresponding path program 1 times [2019-11-06 22:56:28,775 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:28,775 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186799326] [2019-11-06 22:56:28,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 117 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:28,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186799326] [2019-11-06 22:56:28,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956202976] [2019-11-06 22:56:28,986 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 22:56:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:29,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:29,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-06 22:56:29,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 117 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:29,460 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:29,460 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:29,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600971699] [2019-11-06 22:56:29,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:29,462 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:29,462 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-11-06 22:56:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:32,396 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-11-06 22:56:32,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:32,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2019-11-06 22:56:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:32,431 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:56:32,431 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:56:32,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 649 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:56:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:56:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:56:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7782 transitions. [2019-11-06 22:56:32,610 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7782 transitions. Word has length 327 [2019-11-06 22:56:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:32,611 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7782 transitions. [2019-11-06 22:56:32,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7782 transitions. [2019-11-06 22:56:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-11-06 22:56:32,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:32,620 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:56:32,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:32,828 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1373072005, now seen corresponding path program 1 times [2019-11-06 22:56:32,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:32,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553810363] [2019-11-06 22:56:32,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:34,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553810363] [2019-11-06 22:56:34,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592378466] [2019-11-06 22:56:34,019 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 22:56:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:34,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:34,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:34,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:34,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [42856256] [2019-11-06 22:56:34,579 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 353 [2019-11-06 22:56:34,635 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:34,635 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:39,957 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.