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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:46,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:46,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:46,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:46,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:46,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:46,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:46,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:46,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:46,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:46,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:46,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:46,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:46,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:46,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:46,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:46,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:46,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:46,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:46,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:46,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:46,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:46,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:46,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:46,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:46,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:46,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:46,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:46,231 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 00:08:46,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:46,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:46,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:46,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:46,253 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:46,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:46,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:46,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:46,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:46,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:46,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:46,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:46,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:46,255 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:46,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:46,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:46,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:46,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:46,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:46,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:46,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:46,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:46,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:46,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:46,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:46,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:46,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:46,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:46,258 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 00:08:46,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:46,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:46,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:46,604 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:46,604 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:46,605 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-10-15 00:08:46,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096e4e1a1/fc269568ac944fe299156cf8cc147cd5/FLAG0012f08a4 [2019-10-15 00:08:47,328 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:47,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-10-15 00:08:47,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096e4e1a1/fc269568ac944fe299156cf8cc147cd5/FLAG0012f08a4 [2019-10-15 00:08:47,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096e4e1a1/fc269568ac944fe299156cf8cc147cd5 [2019-10-15 00:08:47,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:47,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:47,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:47,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:47,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:47,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:47" (1/1) ... [2019-10-15 00:08:47,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e884bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:47, skipping insertion in model container [2019-10-15 00:08:47,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:47" (1/1) ... [2019-10-15 00:08:47,537 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:47,612 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:48,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:48,582 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:48,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:48,921 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:48,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48 WrapperNode [2019-10-15 00:08:48,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:48,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:48,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:48,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:48,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:48,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:48,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:48,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:49,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:49,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:49,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (1/1) ... [2019-10-15 00:08:49,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:49,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:49,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:49,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:49,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (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 00:08:49,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:51,460 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:51,460 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:51,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:51 BoogieIcfgContainer [2019-10-15 00:08:51,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:51,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:51,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:51,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:51,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:47" (1/3) ... [2019-10-15 00:08:51,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267c6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:51, skipping insertion in model container [2019-10-15 00:08:51,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:48" (2/3) ... [2019-10-15 00:08:51,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267c6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:51, skipping insertion in model container [2019-10-15 00:08:51,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:51" (3/3) ... [2019-10-15 00:08:51,479 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label32.c [2019-10-15 00:08:51,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:51,500 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:51,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:51,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:51,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:51,556 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:51,556 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:51,556 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:51,556 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:51,557 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:51,557 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 00:08:51,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:51,605 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] [2019-10-15 00:08:51,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash -808797987, now seen corresponding path program 1 times [2019-10-15 00:08:51,619 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:51,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582339863] [2019-10-15 00:08:51,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:51,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:51,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:51,922 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 00:08:51,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582339863] [2019-10-15 00:08:51,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:51,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:51,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590754976] [2019-10-15 00:08:51,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:51,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:51,947 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:54,094 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:54,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:54,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-10-15 00:08:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:54,118 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:54,119 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:54,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 00:08:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-15 00:08:54,233 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 54 [2019-10-15 00:08:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:54,234 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-15 00:08:54,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-15 00:08:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 00:08:54,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:54,242 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, 1, 1, 1, 1, 1, 1, 1, 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 00:08:54,242 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:54,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1409214545, now seen corresponding path program 1 times [2019-10-15 00:08:54,243 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:54,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051773025] [2019-10-15 00:08:54,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:54,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:54,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051773025] [2019-10-15 00:08:54,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:54,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:08:54,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198352327] [2019-10-15 00:08:54,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:54,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:54,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:08:54,427 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-15 00:08:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:57,102 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-10-15 00:08:57,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:57,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-10-15 00:08:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:57,115 INFO L225 Difference]: With dead ends: 2066 [2019-10-15 00:08:57,115 INFO L226 Difference]: Without dead ends: 1390 [2019-10-15 00:08:57,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-10-15 00:08:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-10-15 00:08:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-15 00:08:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-10-15 00:08:57,208 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 123 [2019-10-15 00:08:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:57,209 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-10-15 00:08:57,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-10-15 00:08:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 00:08:57,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:57,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:57,216 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash -102275548, now seen corresponding path program 1 times [2019-10-15 00:08:57,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:57,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858158494] [2019-10-15 00:08:57,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:57,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:57,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858158494] [2019-10-15 00:08:57,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:57,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:57,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944829380] [2019-10-15 00:08:57,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:57,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:57,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:57,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:57,440 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-10-15 00:08:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:59,902 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-10-15 00:08:59,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:59,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-15 00:08:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:59,960 INFO L225 Difference]: With dead ends: 3472 [2019-10-15 00:08:59,961 INFO L226 Difference]: Without dead ends: 2106 [2019-10-15 00:08:59,965 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 00:08:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-15 00:09:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-10-15 00:09:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-15 00:09:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-10-15 00:09:00,023 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 152 [2019-10-15 00:09:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:00,024 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-10-15 00:09:00,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-10-15 00:09:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 00:09:00,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:00,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:00,028 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2025156256, now seen corresponding path program 1 times [2019-10-15 00:09:00,029 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:00,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30162581] [2019-10-15 00:09:00,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:00,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:00,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:00,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30162581] [2019-10-15 00:09:00,203 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:00,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:00,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878099924] [2019-10-15 00:09:00,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:00,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:00,206 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-10-15 00:09:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:02,540 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-10-15 00:09:02,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:02,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-10-15 00:09:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:02,569 INFO L225 Difference]: With dead ends: 5241 [2019-10-15 00:09:02,570 INFO L226 Difference]: Without dead ends: 3166 [2019-10-15 00:09:02,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 00:09:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-10-15 00:09:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-10-15 00:09:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-10-15 00:09:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-10-15 00:09:02,661 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 170 [2019-10-15 00:09:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:02,663 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-10-15 00:09:02,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-10-15 00:09:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-10-15 00:09:02,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:02,667 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, 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] [2019-10-15 00:09:02,668 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -925564779, now seen corresponding path program 1 times [2019-10-15 00:09:02,668 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:02,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450037954] [2019-10-15 00:09:02,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,669 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:02,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 113 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:02,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450037954] [2019-10-15 00:09:02,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472904101] [2019-10-15 00:09:02,954 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 00:09:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:03,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:03,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:09:03,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:09:03,363 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:09:03,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 00:09:03,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818005683] [2019-10-15 00:09:03,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:03,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:03,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:09:03,365 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-10-15 00:09:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:05,859 INFO L93 Difference]: Finished difference Result 7976 states and 10525 transitions. [2019-10-15 00:09:05,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:09:05,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 252 [2019-10-15 00:09:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:05,885 INFO L225 Difference]: With dead ends: 7976 [2019-10-15 00:09:05,885 INFO L226 Difference]: Without dead ends: 4842 [2019-10-15 00:09:05,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:09:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2019-10-15 00:09:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4501. [2019-10-15 00:09:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2019-10-15 00:09:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 5661 transitions. [2019-10-15 00:09:06,009 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 5661 transitions. Word has length 252 [2019-10-15 00:09:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:06,010 INFO L462 AbstractCegarLoop]: Abstraction has 4501 states and 5661 transitions. [2019-10-15 00:09:06,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:09:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 5661 transitions. [2019-10-15 00:09:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2019-10-15 00:09:06,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:06,023 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:06,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:06,228 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -538670075, now seen corresponding path program 1 times [2019-10-15 00:09:06,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:06,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552836495] [2019-10-15 00:09:06,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:06,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:06,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 258 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:09:06,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552836495] [2019-10-15 00:09:06,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987090923] [2019-10-15 00:09:06,727 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 00:09:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:06,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:06,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 450 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 00:09:07,042 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 258 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:09:07,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1292374098] [2019-10-15 00:09:07,405 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 472 [2019-10-15 00:09:07,463 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:07,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:18,299 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:18,301 INFO L272 AbstractInterpreter]: Visited 179 different actions 179 times. Never merged. Never widened. Performed 350 root evaluator evaluations with a maximum evaluation depth of 14. Performed 350 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:18,305 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates