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/Problem15_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:45,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:45,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:45,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:45,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:45,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:45,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:45,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:45,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:45,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:45,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:45,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:45,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:45,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:45,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:45,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:45,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:45,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:45,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:45,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:45,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:45,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:45,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:45,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:45,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:45,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:45,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:45,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:45,293 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 00:07:45,314 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:45,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:45,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:45,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:45,318 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:45,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:45,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:45,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:45,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:45,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:45,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:45,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:45,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:45,320 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:45,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:45,320 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:45,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:45,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:45,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:45,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:45,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:45,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:45,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:45,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:45,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:45,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:45,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:45,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:45,324 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 00:07:45,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:45,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:45,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:45,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:45,626 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:45,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-15 00:07:45,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb6cb8c15/b5d1c1310f7e4392bf43659948007c6d/FLAG92fa6cf59 [2019-10-15 00:07:46,355 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:46,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-15 00:07:46,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb6cb8c15/b5d1c1310f7e4392bf43659948007c6d/FLAG92fa6cf59 [2019-10-15 00:07:46,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb6cb8c15/b5d1c1310f7e4392bf43659948007c6d [2019-10-15 00:07:46,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:46,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:46,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:46,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:46,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:46,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:46" (1/1) ... [2019-10-15 00:07:46,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24048c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:46, skipping insertion in model container [2019-10-15 00:07:46,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:46" (1/1) ... [2019-10-15 00:07:46,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:46,644 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:47,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:47,643 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:47,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:48,015 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:48,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48 WrapperNode [2019-10-15 00:07:48,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:48,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:48,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:48,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:48,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (1/1) ... [2019-10-15 00:07:48,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:48,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:48,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:48,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:48,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (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 00:07:48,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:48,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:48,327 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:51,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:51,483 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:51,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:51 BoogieIcfgContainer [2019-10-15 00:07:51,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:51,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:51,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:51,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:51,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:46" (1/3) ... [2019-10-15 00:07:51,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634b8f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:51, skipping insertion in model container [2019-10-15 00:07:51,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:48" (2/3) ... [2019-10-15 00:07:51,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634b8f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:51, skipping insertion in model container [2019-10-15 00:07:51,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:51" (3/3) ... [2019-10-15 00:07:51,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2019-10-15 00:07:51,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:51,518 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:51,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:51,572 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:51,573 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:51,573 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:51,573 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:51,573 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:51,573 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:51,574 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:51,574 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-15 00:07:51,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:51,626 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] [2019-10-15 00:07:51,628 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1056547171, now seen corresponding path program 1 times [2019-10-15 00:07:51,645 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:51,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265423006] [2019-10-15 00:07:51,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:51,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:51,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:51,987 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 00:07:51,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265423006] [2019-10-15 00:07:51,989 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:51,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:51,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040501511] [2019-10-15 00:07:51,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:51,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:52,014 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:58,808 INFO L93 Difference]: Finished difference Result 1546 states and 2831 transitions. [2019-10-15 00:07:58,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:58,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2019-10-15 00:07:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:58,836 INFO L225 Difference]: With dead ends: 1546 [2019-10-15 00:07:58,837 INFO L226 Difference]: Without dead ends: 1028 [2019-10-15 00:07:58,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-15 00:07:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-10-15 00:07:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-15 00:07:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-10-15 00:07:58,953 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 53 [2019-10-15 00:07:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:58,953 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-10-15 00:07:58,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-10-15 00:07:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:07:58,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:58,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:58,961 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash -602725951, now seen corresponding path program 1 times [2019-10-15 00:07:58,961 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:58,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192551486] [2019-10-15 00:07:58,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:58,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:58,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:59,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192551486] [2019-10-15 00:07:59,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:59,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:59,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368990084] [2019-10-15 00:07:59,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:59,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:59,209 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-10-15 00:08:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:03,027 INFO L93 Difference]: Finished difference Result 2057 states and 3297 transitions. [2019-10-15 00:08:03,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:08:03,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2019-10-15 00:08:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:03,043 INFO L225 Difference]: With dead ends: 2057 [2019-10-15 00:08:03,043 INFO L226 Difference]: Without dead ends: 1363 [2019-10-15 00:08:03,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 00:08:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-15 00:08:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-10-15 00:08:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-15 00:08:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-10-15 00:08:03,108 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 125 [2019-10-15 00:08:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:03,109 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-10-15 00:08:03,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-10-15 00:08:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:08:03,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:03,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:03,116 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:03,116 INFO L82 PathProgramCache]: Analyzing trace with hash 741212625, now seen corresponding path program 1 times [2019-10-15 00:08:03,116 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:03,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580999721] [2019-10-15 00:08:03,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:03,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:03,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:03,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580999721] [2019-10-15 00:08:03,416 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:03,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:03,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782737411] [2019-10-15 00:08:03,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:03,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:03,419 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 6 states. [2019-10-15 00:08:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:13,282 INFO L93 Difference]: Finished difference Result 6402 states and 9367 transitions. [2019-10-15 00:08:13,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:08:13,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-15 00:08:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:13,310 INFO L225 Difference]: With dead ends: 6402 [2019-10-15 00:08:13,310 INFO L226 Difference]: Without dead ends: 5075 [2019-10-15 00:08:13,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2019-10-15 00:08:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4748. [2019-10-15 00:08:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4748 states. [2019-10-15 00:08:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 6574 transitions. [2019-10-15 00:08:13,454 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 6574 transitions. Word has length 133 [2019-10-15 00:08:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:13,455 INFO L462 AbstractCegarLoop]: Abstraction has 4748 states and 6574 transitions. [2019-10-15 00:08:13,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 6574 transitions. [2019-10-15 00:08:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-15 00:08:13,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:13,464 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:08:13,465 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1520888321, now seen corresponding path program 1 times [2019-10-15 00:08:13,465 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:13,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905651367] [2019-10-15 00:08:13,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:13,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:13,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 00:08:13,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905651367] [2019-10-15 00:08:13,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:13,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:13,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052900170] [2019-10-15 00:08:13,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:13,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:13,645 INFO L87 Difference]: Start difference. First operand 4748 states and 6574 transitions. Second operand 4 states. [2019-10-15 00:08:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:17,664 INFO L93 Difference]: Finished difference Result 18433 states and 26449 transitions. [2019-10-15 00:08:17,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:17,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 211 [2019-10-15 00:08:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:17,734 INFO L225 Difference]: With dead ends: 18433 [2019-10-15 00:08:17,734 INFO L226 Difference]: Without dead ends: 13691 [2019-10-15 00:08:17,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13691 states. [2019-10-15 00:08:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13691 to 11845. [2019-10-15 00:08:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11845 states. [2019-10-15 00:08:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11845 states to 11845 states and 15841 transitions. [2019-10-15 00:08:18,162 INFO L78 Accepts]: Start accepts. Automaton has 11845 states and 15841 transitions. Word has length 211 [2019-10-15 00:08:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:18,163 INFO L462 AbstractCegarLoop]: Abstraction has 11845 states and 15841 transitions. [2019-10-15 00:08:18,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11845 states and 15841 transitions. [2019-10-15 00:08:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-10-15 00:08:18,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:18,191 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:08:18,191 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash 888259648, now seen corresponding path program 1 times [2019-10-15 00:08:18,192 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:18,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063446516] [2019-10-15 00:08:18,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:18,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:18,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-15 00:08:18,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063446516] [2019-10-15 00:08:18,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726517593] [2019-10-15 00:08:18,931 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 00:08:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:19,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 00:08:19,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-15 00:08:19,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-15 00:08:20,334 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:08:20,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-15 00:08:20,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98560155] [2019-10-15 00:08:20,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:20,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:20,337 INFO L87 Difference]: Start difference. First operand 11845 states and 15841 transitions. Second operand 4 states. [2019-10-15 00:08:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:24,035 INFO L93 Difference]: Finished difference Result 27125 states and 36766 transitions. [2019-10-15 00:08:24,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:24,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 446 [2019-10-15 00:08:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:24,109 INFO L225 Difference]: With dead ends: 27125 [2019-10-15 00:08:24,110 INFO L226 Difference]: Without dead ends: 15286 [2019-10-15 00:08:24,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15286 states. [2019-10-15 00:08:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15286 to 12514. [2019-10-15 00:08:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12514 states. [2019-10-15 00:08:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12514 states to 12514 states and 16982 transitions. [2019-10-15 00:08:24,576 INFO L78 Accepts]: Start accepts. Automaton has 12514 states and 16982 transitions. Word has length 446 [2019-10-15 00:08:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:24,578 INFO L462 AbstractCegarLoop]: Abstraction has 12514 states and 16982 transitions. [2019-10-15 00:08:24,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 12514 states and 16982 transitions. [2019-10-15 00:08:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-10-15 00:08:24,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:24,601 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]