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/Problem03_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:43,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:43,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:43,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:43,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:43,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:43,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:43,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:43,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:43,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:43,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:43,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:43,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:43,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:43,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:43,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:43,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:43,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:43,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:43,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:43,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:43,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:43,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:43,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:43,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:43,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:43,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:43,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:43,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:43,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:43,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:43,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:43,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:43,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:43,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:43,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:43,309 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 [2019-10-14 23:58:43,323 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:43,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:43,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:43,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:43,325 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:43,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:43,326 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:43,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:43,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:43,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:43,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:43,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:43,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:43,327 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:43,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:43,327 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:43,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:43,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:43,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:43,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:43,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:43,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:43,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:43,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:43,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:43,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:43,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:43,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:43,330 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 [2019-10-14 23:58:43,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:43,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:43,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:43,668 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:43,668 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:43,669 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-10-14 23:58:43,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355637274/02d62fad9e5c4e9a839809cd1cd71150/FLAG3723c0ec3 [2019-10-14 23:58:44,346 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:44,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label32.c [2019-10-14 23:58:44,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355637274/02d62fad9e5c4e9a839809cd1cd71150/FLAG3723c0ec3 [2019-10-14 23:58:44,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355637274/02d62fad9e5c4e9a839809cd1cd71150 [2019-10-14 23:58:44,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:44,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:44,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:44,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:44,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:44,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:44" (1/1) ... [2019-10-14 23:58:44,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:44, skipping insertion in model container [2019-10-14 23:58:44,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:44" (1/1) ... [2019-10-14 23:58:44,633 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:44,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:45,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:45,472 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:45,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:45,745 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:45,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45 WrapperNode [2019-10-14 23:58:45,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:45,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:45,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:45,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:45,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (1/1) ... [2019-10-14 23:58:45,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:45,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:45,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:45,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:45,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (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 [2019-10-14 23:58:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:47,986 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:47,986 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:47,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:47 BoogieIcfgContainer [2019-10-14 23:58:47,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:47,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:47,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:47,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:47,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:44" (1/3) ... [2019-10-14 23:58:47,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cff0830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:47, skipping insertion in model container [2019-10-14 23:58:47,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:45" (2/3) ... [2019-10-14 23:58:47,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cff0830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:47, skipping insertion in model container [2019-10-14 23:58:47,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:47" (3/3) ... [2019-10-14 23:58:48,001 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label32.c [2019-10-14 23:58:48,016 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:48,031 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:48,043 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:48,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:48,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:48,089 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:48,089 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:48,089 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:48,089 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:48,089 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:48,089 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-14 23:58:48,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:48,151 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:48,153 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash -846647824, now seen corresponding path program 1 times [2019-10-14 23:58:48,166 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:48,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014368197] [2019-10-14 23:58:48,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:48,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014368197] [2019-10-14 23:58:48,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:48,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:48,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485032446] [2019-10-14 23:58:48,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:48,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:49,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:49,006 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:50,439 INFO L93 Difference]: Finished difference Result 842 states and 1484 transitions. [2019-10-14 23:58:50,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:50,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 195 [2019-10-14 23:58:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:50,462 INFO L225 Difference]: With dead ends: 842 [2019-10-14 23:58:50,463 INFO L226 Difference]: Without dead ends: 469 [2019-10-14 23:58:50,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2019-10-14 23:58:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 468. [2019-10-14 23:58:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2019-10-14 23:58:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 718 transitions. [2019-10-14 23:58:50,555 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 718 transitions. Word has length 195 [2019-10-14 23:58:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:50,556 INFO L462 AbstractCegarLoop]: Abstraction has 468 states and 718 transitions. [2019-10-14 23:58:50,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 718 transitions. [2019-10-14 23:58:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-14 23:58:50,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:50,563 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:50,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 175357299, now seen corresponding path program 1 times [2019-10-14 23:58:50,564 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:50,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478332140] [2019-10-14 23:58:50,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,566 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:50,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478332140] [2019-10-14 23:58:50,864 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:50,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:50,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405370602] [2019-10-14 23:58:50,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:50,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:50,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:50,870 INFO L87 Difference]: Start difference. First operand 468 states and 718 transitions. Second operand 6 states. [2019-10-14 23:58:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:52,682 INFO L93 Difference]: Finished difference Result 1409 states and 2231 transitions. [2019-10-14 23:58:52,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:52,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2019-10-14 23:58:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:52,693 INFO L225 Difference]: With dead ends: 1409 [2019-10-14 23:58:52,693 INFO L226 Difference]: Without dead ends: 947 [2019-10-14 23:58:52,697 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 [2019-10-14 23:58:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2019-10-14 23:58:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 910. [2019-10-14 23:58:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-10-14 23:58:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1387 transitions. [2019-10-14 23:58:52,765 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1387 transitions. Word has length 204 [2019-10-14 23:58:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:52,765 INFO L462 AbstractCegarLoop]: Abstraction has 910 states and 1387 transitions. [2019-10-14 23:58:52,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1387 transitions. [2019-10-14 23:58:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-14 23:58:52,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:52,771 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:52,771 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash 94250244, now seen corresponding path program 1 times [2019-10-14 23:58:52,772 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:52,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291115781] [2019-10-14 23:58:52,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:53,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291115781] [2019-10-14 23:58:53,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:53,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:53,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812799295] [2019-10-14 23:58:53,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:53,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:53,003 INFO L87 Difference]: Start difference. First operand 910 states and 1387 transitions. Second operand 3 states. [2019-10-14 23:58:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:54,108 INFO L93 Difference]: Finished difference Result 2674 states and 4169 transitions. [2019-10-14 23:58:54,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:54,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-10-14 23:58:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:54,121 INFO L225 Difference]: With dead ends: 2674 [2019-10-14 23:58:54,121 INFO L226 Difference]: Without dead ends: 1770 [2019-10-14 23:58:54,125 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 [2019-10-14 23:58:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2019-10-14 23:58:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1748. [2019-10-14 23:58:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2019-10-14 23:58:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2648 transitions. [2019-10-14 23:58:54,195 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2648 transitions. Word has length 207 [2019-10-14 23:58:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:54,196 INFO L462 AbstractCegarLoop]: Abstraction has 1748 states and 2648 transitions. [2019-10-14 23:58:54,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2648 transitions. [2019-10-14 23:58:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-14 23:58:54,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:54,205 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:54,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash 640358255, now seen corresponding path program 1 times [2019-10-14 23:58:54,206 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:54,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183781590] [2019-10-14 23:58:54,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:54,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:54,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:54,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183781590] [2019-10-14 23:58:54,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054027272] [2019-10-14 23:58:54,392 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 [2019-10-14 23:58:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:54,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:54,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:54,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:54,907 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:54,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:58:54,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004272377] [2019-10-14 23:58:54,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:54,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:54,911 INFO L87 Difference]: Start difference. First operand 1748 states and 2648 transitions. Second operand 3 states. [2019-10-14 23:58:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:55,991 INFO L93 Difference]: Finished difference Result 5176 states and 8064 transitions. [2019-10-14 23:58:55,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:55,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-10-14 23:58:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:56,020 INFO L225 Difference]: With dead ends: 5176 [2019-10-14 23:58:56,021 INFO L226 Difference]: Without dead ends: 3434 [2019-10-14 23:58:56,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2019-10-14 23:58:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3429. [2019-10-14 23:58:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3429 states. [2019-10-14 23:58:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 5066 transitions. [2019-10-14 23:58:56,137 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 5066 transitions. Word has length 224 [2019-10-14 23:58:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:56,138 INFO L462 AbstractCegarLoop]: Abstraction has 3429 states and 5066 transitions. [2019-10-14 23:58:56,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 5066 transitions. [2019-10-14 23:58:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-14 23:58:56,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:56,151 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:56,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:56,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash 442727854, now seen corresponding path program 1 times [2019-10-14 23:58:56,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:56,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904510962] [2019-10-14 23:58:56,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:56,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:56,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:56,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904510962] [2019-10-14 23:58:56,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444649331] [2019-10-14 23:58:56,586 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 [2019-10-14 23:58:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:56,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:57,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:57,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:57,199 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:57,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:58:57,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277535664] [2019-10-14 23:58:57,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:57,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:57,202 INFO L87 Difference]: Start difference. First operand 3429 states and 5066 transitions. Second operand 3 states. [2019-10-14 23:58:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:58,475 INFO L93 Difference]: Finished difference Result 10009 states and 15198 transitions. [2019-10-14 23:58:58,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:58,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 231 [2019-10-14 23:58:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:58,512 INFO L225 Difference]: With dead ends: 10009 [2019-10-14 23:58:58,513 INFO L226 Difference]: Without dead ends: 6586 [2019-10-14 23:58:58,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 460 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2019-10-14 23:58:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 6561. [2019-10-14 23:58:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6561 states. [2019-10-14 23:58:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 9885 transitions. [2019-10-14 23:58:58,759 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 9885 transitions. Word has length 231 [2019-10-14 23:58:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:58,759 INFO L462 AbstractCegarLoop]: Abstraction has 6561 states and 9885 transitions. [2019-10-14 23:58:58,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 9885 transitions. [2019-10-14 23:58:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-14 23:58:58,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:58,788 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:58,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:58,995 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash 112893857, now seen corresponding path program 1 times [2019-10-14 23:58:58,995 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:58,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126395197] [2019-10-14 23:58:58,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:58,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:58,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:59,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126395197] [2019-10-14 23:58:59,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101336630] [2019-10-14 23:58:59,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:59,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:59,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:59,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:59,746 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-14 23:58:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:59,861 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:59,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:58:59,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071685504] [2019-10-14 23:58:59,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:59,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:59,864 INFO L87 Difference]: Start difference. First operand 6561 states and 9885 transitions. Second operand 3 states. [2019-10-14 23:59:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:01,080 INFO L93 Difference]: Finished difference Result 18738 states and 28867 transitions. [2019-10-14 23:59:01,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:01,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2019-10-14 23:59:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:01,144 INFO L225 Difference]: With dead ends: 18738 [2019-10-14 23:59:01,144 INFO L226 Difference]: Without dead ends: 12183 [2019-10-14 23:59:01,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:59:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2019-10-14 23:59:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 12180. [2019-10-14 23:59:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12180 states. [2019-10-14 23:59:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 16926 transitions. [2019-10-14 23:59:01,567 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 16926 transitions. Word has length 250 [2019-10-14 23:59:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:01,568 INFO L462 AbstractCegarLoop]: Abstraction has 12180 states and 16926 transitions. [2019-10-14 23:59:01,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 16926 transitions. [2019-10-14 23:59:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-14 23:59:01,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:01,623 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:01,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:01,829 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 938767275, now seen corresponding path program 1 times [2019-10-14 23:59:01,830 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:01,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963739415] [2019-10-14 23:59:01,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:01,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:01,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 100 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:59:02,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963739415] [2019-10-14 23:59:02,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106428239] [2019-10-14 23:59:02,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:02,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:59:02,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:59:02,631 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:59:02,865 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:02,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-10-14 23:59:02,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791318268] [2019-10-14 23:59:02,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:59:02,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:59:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:59:02,868 INFO L87 Difference]: Start difference. First operand 12180 states and 16926 transitions. Second operand 7 states. [2019-10-14 23:59:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:03,655 INFO L93 Difference]: Finished difference Result 36829 states and 53729 transitions. [2019-10-14 23:59:03,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:59:03,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2019-10-14 23:59:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:03,783 INFO L225 Difference]: With dead ends: 36829 [2019-10-14 23:59:03,783 INFO L226 Difference]: Without dead ends: 24655 [2019-10-14 23:59:03,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 574 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:59:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2019-10-14 23:59:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24421. [2019-10-14 23:59:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24421 states. [2019-10-14 23:59:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24421 states to 24421 states and 34410 transitions. [2019-10-14 23:59:04,621 INFO L78 Accepts]: Start accepts. Automaton has 24421 states and 34410 transitions. Word has length 292 [2019-10-14 23:59:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:04,621 INFO L462 AbstractCegarLoop]: Abstraction has 24421 states and 34410 transitions. [2019-10-14 23:59:04,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:59:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 24421 states and 34410 transitions. [2019-10-14 23:59:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-10-14 23:59:04,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:04,722 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:04,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:04,929 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1601607134, now seen corresponding path program 1 times [2019-10-14 23:59:04,930 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:04,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141767345] [2019-10-14 23:59:04,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:04,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 89 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:05,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141767345] [2019-10-14 23:59:05,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885254422] [2019-10-14 23:59:05,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:05,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:05,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:05,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:05,989 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:59:05,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:59:05,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915939364] [2019-10-14 23:59:05,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:05,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:05,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:05,992 INFO L87 Difference]: Start difference. First operand 24421 states and 34410 transitions. Second operand 3 states. [2019-10-14 23:59:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:07,343 INFO L93 Difference]: Finished difference Result 59893 states and 87486 transitions. [2019-10-14 23:59:07,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:07,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2019-10-14 23:59:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:07,497 INFO L225 Difference]: With dead ends: 59893 [2019-10-14 23:59:07,497 INFO L226 Difference]: Without dead ends: 35478 [2019-10-14 23:59:07,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 590 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:59:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35478 states. [2019-10-14 23:59:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35478 to 35472. [2019-10-14 23:59:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35472 states. [2019-10-14 23:59:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35472 states to 35472 states and 51512 transitions. [2019-10-14 23:59:08,403 INFO L78 Accepts]: Start accepts. Automaton has 35472 states and 51512 transitions. Word has length 295 [2019-10-14 23:59:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:08,404 INFO L462 AbstractCegarLoop]: Abstraction has 35472 states and 51512 transitions. [2019-10-14 23:59:08,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 35472 states and 51512 transitions. [2019-10-14 23:59:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-10-14 23:59:08,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:08,487 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:08,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:08,701 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash 470800667, now seen corresponding path program 1 times [2019-10-14 23:59:08,702 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:08,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762714821] [2019-10-14 23:59:08,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:08,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:08,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762714821] [2019-10-14 23:59:10,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221660701] [2019-10-14 23:59:10,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:59:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:10,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:59:10,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [830507307] [2019-10-14 23:59:10,739 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 338 [2019-10-14 23:59:10,849 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:59:10,849 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)