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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:27,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:27,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:27,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:27,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:27,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:27,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:28,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:28,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:28,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:28,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:28,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:28,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:28,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:28,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:28,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:28,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:28,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:28,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:28,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:28,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:28,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:28,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:28,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:28,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:28,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:28,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:28,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:28,058 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 [2019-10-15 00:09:28,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:28,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:28,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:28,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:28,096 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:28,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:28,096 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:28,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:28,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:28,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:28,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:28,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:28,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:28,097 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:28,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:28,098 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:28,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:28,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:28,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:28,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:28,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:28,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:28,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:28,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:28,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:28,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:28,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:28,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:28,100 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 [2019-10-15 00:09:28,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:28,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:28,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:28,389 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:28,389 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:28,390 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-15 00:09:28,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85dc67649/4c55d7d5042a4becad19c1f145898542/FLAGfe1bf426d [2019-10-15 00:09:29,194 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:29,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-15 00:09:29,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85dc67649/4c55d7d5042a4becad19c1f145898542/FLAGfe1bf426d [2019-10-15 00:09:29,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85dc67649/4c55d7d5042a4becad19c1f145898542 [2019-10-15 00:09:29,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:29,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:29,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:29,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:29,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:29,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2019-10-15 00:09:29,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26497d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29, skipping insertion in model container [2019-10-15 00:09:29,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2019-10-15 00:09:29,319 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:29,397 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:30,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:30,361 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:30,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:30,607 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:30,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30 WrapperNode [2019-10-15 00:09:30,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:30,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:30,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:30,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:30,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:30,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:30,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:30,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:30,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (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 [2019-10-15 00:09:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:30,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:30,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:33,313 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:33,314 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:33,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:33 BoogieIcfgContainer [2019-10-15 00:09:33,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:33,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:33,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:33,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:33,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:29" (1/3) ... [2019-10-15 00:09:33,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6b21f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:33, skipping insertion in model container [2019-10-15 00:09:33,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (2/3) ... [2019-10-15 00:09:33,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6b21f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:33, skipping insertion in model container [2019-10-15 00:09:33,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:33" (3/3) ... [2019-10-15 00:09:33,329 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-10-15 00:09:33,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:33,346 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:33,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:33,389 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:33,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:33,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:33,390 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:33,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:33,390 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:33,390 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:33,390 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 00:09:33,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:33,429 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:33,431 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times [2019-10-15 00:09:33,446 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:33,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889037720] [2019-10-15 00:09:33,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:33,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:33,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:33,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889037720] [2019-10-15 00:09:33,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:33,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:33,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867203059] [2019-10-15 00:09:33,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:33,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:33,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:33,805 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:36,236 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:36,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:36,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-10-15 00:09:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:36,259 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:36,259 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:36,268 INFO L600 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 [2019-10-15 00:09:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:09:36,395 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 57 [2019-10-15 00:09:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:36,396 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:09:36,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:09:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 00:09:36,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:36,406 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:36,406 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1636148102, now seen corresponding path program 1 times [2019-10-15 00:09:36,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:36,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94111526] [2019-10-15 00:09:36,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:36,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:36,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:36,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94111526] [2019-10-15 00:09:36,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:36,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:36,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110382107] [2019-10-15 00:09:36,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:36,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:36,690 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-15 00:09:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:39,364 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-15 00:09:39,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:39,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-15 00:09:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:39,373 INFO L225 Difference]: With dead ends: 1730 [2019-10-15 00:09:39,373 INFO L226 Difference]: Without dead ends: 1054 [2019-10-15 00:09:39,375 INFO L600 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 [2019-10-15 00:09:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-15 00:09:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-15 00:09:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-15 00:09:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-15 00:09:39,421 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 149 [2019-10-15 00:09:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:39,422 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-15 00:09:39,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-15 00:09:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-15 00:09:39,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:39,437 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:39,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1608986538, now seen corresponding path program 1 times [2019-10-15 00:09:39,438 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:39,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24875390] [2019-10-15 00:09:39,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:39,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:39,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:39,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24875390] [2019-10-15 00:09:39,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91231624] [2019-10-15 00:09:39,820 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 [2019-10-15 00:09:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:39,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:40,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-15 00:09:40,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:40,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:40,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:40,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954091688] [2019-10-15 00:09:40,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:40,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:40,437 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-15 00:09:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:44,948 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-15 00:09:44,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:44,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-15 00:09:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:44,959 INFO L225 Difference]: With dead ends: 2427 [2019-10-15 00:09:44,959 INFO L226 Difference]: Without dead ends: 1399 [2019-10-15 00:09:44,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 513 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-15 00:09:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-15 00:09:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-15 00:09:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-15 00:09:45,006 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 259 [2019-10-15 00:09:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:45,007 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-15 00:09:45,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-15 00:09:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-10-15 00:09:45,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:45,015 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-10-15 00:09:45,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:45,222 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1534419377, now seen corresponding path program 1 times [2019-10-15 00:09:45,223 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:45,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253350022] [2019-10-15 00:09:45,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:45,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:45,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:45,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253350022] [2019-10-15 00:09:45,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621692033] [2019-10-15 00:09:45,567 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 [2019-10-15 00:09:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:45,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:45,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-10-15 00:09:45,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:46,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:46,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:09:46,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661842270] [2019-10-15 00:09:46,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:46,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:46,020 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-15 00:09:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:49,048 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-15 00:09:49,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:49,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-10-15 00:09:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:49,069 INFO L225 Difference]: With dead ends: 4241 [2019-10-15 00:09:49,069 INFO L226 Difference]: Without dead ends: 2859 [2019-10-15 00:09:49,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-15 00:09:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-15 00:09:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-15 00:09:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-10-15 00:09:49,186 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 334 [2019-10-15 00:09:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:49,187 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-10-15 00:09:49,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-10-15 00:09:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-15 00:09:49,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:49,196 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2019-10-15 00:09:49,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:49,408 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1718340841, now seen corresponding path program 1 times [2019-10-15 00:09:49,409 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:49,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232957234] [2019-10-15 00:09:49,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:49,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:49,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:49,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232957234] [2019-10-15 00:09:49,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548620157] [2019-10-15 00:09:49,772 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 [2019-10-15 00:09:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:49,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:49,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-10-15 00:09:50,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:50,228 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:50,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:50,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346331875] [2019-10-15 00:09:50,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:50,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:50,231 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-10-15 00:09:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:52,930 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-10-15 00:09:52,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:52,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2019-10-15 00:09:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:52,978 INFO L225 Difference]: With dead ends: 8487 [2019-10-15 00:09:52,978 INFO L226 Difference]: Without dead ends: 5674 [2019-10-15 00:09:52,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 671 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-15 00:09:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-15 00:09:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-15 00:09:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7782 transitions. [2019-10-15 00:09:53,191 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7782 transitions. Word has length 338 [2019-10-15 00:09:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:53,195 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7782 transitions. [2019-10-15 00:09:53,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7782 transitions. [2019-10-15 00:09:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-10-15 00:09:53,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:53,207 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:53,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:53,419 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1405018386, now seen corresponding path program 1 times [2019-10-15 00:09:53,420 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:53,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122538748] [2019-10-15 00:09:53,421 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:53,421 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:53,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:55,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122538748] [2019-10-15 00:09:55,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577142375] [2019-10-15 00:09:55,180 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 [2019-10-15 00:09:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:55,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:55,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:55,437 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:55,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2064944575] [2019-10-15 00:09:55,696 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 364 [2019-10-15 00:09:55,756 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:55,757 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:10:01,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.