/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:40,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:40,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:40,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:40,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:40,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:40,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:40,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:40,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:40,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:40,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:40,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:40,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:40,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:40,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:40,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:40,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:40,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:40,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:40,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:40,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:40,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:40,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:40,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:40,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:49:40,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:49:40,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:49:40,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:49:40,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:49:40,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:49:40,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:49:40,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:49:40,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:49:40,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:49:40,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:49:40,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:49:40,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:49:40,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:49:40,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:40,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:40,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:40,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:49:40,236 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:40,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:40,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:40,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:40,238 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:40,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:40,239 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:40,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:40,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:40,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:40,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:40,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:40,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:40,240 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:40,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:40,241 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:40,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:40,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:40,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:40,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:40,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:40,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:40,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:40,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:40,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:40,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:40,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:40,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:40,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:49:40,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:40,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:40,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:40,561 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:40,562 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:40,562 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-11-06 22:49:40,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a48e1482/a6e95e445a5346d5b7dc379f0cd582b4/FLAG011aa1c8c [2019-11-06 22:49:41,256 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:41,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-11-06 22:49:41,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a48e1482/a6e95e445a5346d5b7dc379f0cd582b4/FLAG011aa1c8c [2019-11-06 22:49:41,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a48e1482/a6e95e445a5346d5b7dc379f0cd582b4 [2019-11-06 22:49:41,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:41,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:41,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:41,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:41,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:41,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:41" (1/1) ... [2019-11-06 22:49:41,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40852bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:41, skipping insertion in model container [2019-11-06 22:49:41,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:41" (1/1) ... [2019-11-06 22:49:41,542 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:41,614 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:42,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:42,190 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:42,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:42,374 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:42,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42 WrapperNode [2019-11-06 22:49:42,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:42,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:42,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:42,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:42,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:42,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:42,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:42,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:42,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:42,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:42,609 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:44,360 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:44,361 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:44,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:44 BoogieIcfgContainer [2019-11-06 22:49:44,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:44,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:44,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:44,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:44,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:41" (1/3) ... [2019-11-06 22:49:44,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff4595b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:44, skipping insertion in model container [2019-11-06 22:49:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (2/3) ... [2019-11-06 22:49:44,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff4595b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:44, skipping insertion in model container [2019-11-06 22:49:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:44" (3/3) ... [2019-11-06 22:49:44,373 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-11-06 22:49:44,384 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:44,393 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:44,406 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:44,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:44,436 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:44,436 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:44,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:44,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:44,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:44,437 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:44,437 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 22:49:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 22:49:44,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:44,473 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:44,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-11-06 22:49:44,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:44,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443555055] [2019-11-06 22:49:44,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:44,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443555055] [2019-11-06 22:49:44,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:44,814 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:49:44,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247729996] [2019-11-06 22:49:44,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:44,823 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:44,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:44,841 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-11-06 22:49:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:45,949 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-11-06 22:49:45,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:45,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-11-06 22:49:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:45,973 INFO L225 Difference]: With dead ends: 688 [2019-11-06 22:49:45,973 INFO L226 Difference]: Without dead ends: 372 [2019-11-06 22:49:45,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-06 22:49:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-11-06 22:49:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-11-06 22:49:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-11-06 22:49:46,063 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 59 [2019-11-06 22:49:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:46,063 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-11-06 22:49:46,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-11-06 22:49:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:49:46,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:46,071 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:49:46,071 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:46,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-11-06 22:49:46,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:46,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390980598] [2019-11-06 22:49:46,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:46,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390980598] [2019-11-06 22:49:46,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:46,315 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:49:46,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349138039] [2019-11-06 22:49:46,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:49:46,317 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:49:46,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:46,319 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-11-06 22:49:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:47,679 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-11-06 22:49:47,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:49:47,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-11-06 22:49:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:47,686 INFO L225 Difference]: With dead ends: 1122 [2019-11-06 22:49:47,686 INFO L226 Difference]: Without dead ends: 756 [2019-11-06 22:49:47,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:49:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-11-06 22:49:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-11-06 22:49:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-06 22:49:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-11-06 22:49:47,738 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 128 [2019-11-06 22:49:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:47,739 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-11-06 22:49:47,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:49:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-11-06 22:49:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:49:47,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:47,742 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:49:47,743 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-11-06 22:49:47,743 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:47,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437705261] [2019-11-06 22:49:47,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:47,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437705261] [2019-11-06 22:49:47,898 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:47,898 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:47,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309428416] [2019-11-06 22:49:47,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:47,899 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:47,900 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:49:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:49,139 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-11-06 22:49:49,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:49:49,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-11-06 22:49:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:49,152 INFO L225 Difference]: With dead ends: 1904 [2019-11-06 22:49:49,152 INFO L226 Difference]: Without dead ends: 1158 [2019-11-06 22:49:49,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:49:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-11-06 22:49:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-11-06 22:49:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-11-06 22:49:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-11-06 22:49:49,210 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 129 [2019-11-06 22:49:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:49,211 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-11-06 22:49:49,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-11-06 22:49:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:49:49,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:49,214 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:49,215 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-11-06 22:49:49,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:49,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259139366] [2019-11-06 22:49:49,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:49,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259139366] [2019-11-06 22:49:49,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:49,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:49,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110195769] [2019-11-06 22:49:49,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:49,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:49,442 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-11-06 22:49:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:50,708 INFO L93 Difference]: Finished difference Result 2882 states and 4163 transitions. [2019-11-06 22:49:50,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:49:50,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-11-06 22:49:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:50,719 INFO L225 Difference]: With dead ends: 2882 [2019-11-06 22:49:50,719 INFO L226 Difference]: Without dead ends: 1750 [2019-11-06 22:49:50,722 INFO L630 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 [2019-11-06 22:49:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2019-11-06 22:49:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1514. [2019-11-06 22:49:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-11-06 22:49:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2084 transitions. [2019-11-06 22:49:50,781 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2084 transitions. Word has length 131 [2019-11-06 22:49:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:50,781 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 2084 transitions. [2019-11-06 22:49:50,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2084 transitions. [2019-11-06 22:49:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:49:50,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:50,784 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:49:50,785 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-11-06 22:49:50,785 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:50,786 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162326400] [2019-11-06 22:49:50,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:50,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162326400] [2019-11-06 22:49:50,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:50,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:50,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018665645] [2019-11-06 22:49:50,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:50,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:50,897 INFO L87 Difference]: Start difference. First operand 1514 states and 2084 transitions. Second operand 4 states. [2019-11-06 22:49:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:52,266 INFO L93 Difference]: Finished difference Result 4684 states and 6499 transitions. [2019-11-06 22:49:52,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:49:52,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-11-06 22:49:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:52,288 INFO L225 Difference]: With dead ends: 4684 [2019-11-06 22:49:52,291 INFO L226 Difference]: Without dead ends: 3176 [2019-11-06 22:49:52,297 INFO L630 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 [2019-11-06 22:49:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2019-11-06 22:49:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2262. [2019-11-06 22:49:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-11-06 22:49:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3060 transitions. [2019-11-06 22:49:52,407 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3060 transitions. Word has length 132 [2019-11-06 22:49:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:52,408 INFO L462 AbstractCegarLoop]: Abstraction has 2262 states and 3060 transitions. [2019-11-06 22:49:52,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:49:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3060 transitions. [2019-11-06 22:49:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-11-06 22:49:52,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:52,421 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:52,421 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-11-06 22:49:52,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:52,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332387305] [2019-11-06 22:49:52,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 165 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:52,898 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332387305] [2019-11-06 22:49:52,898 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846167690] [2019-11-06 22:49:52,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:53,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:49:53,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:53,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 22:49:53,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:53,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:49:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 104 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:49:53,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:49:53,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-11-06 22:49:53,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740982195] [2019-11-06 22:49:53,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:53,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:49:53,877 INFO L87 Difference]: Start difference. First operand 2262 states and 3060 transitions. Second operand 5 states. [2019-11-06 22:49:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:55,220 INFO L93 Difference]: Finished difference Result 4364 states and 5979 transitions. [2019-11-06 22:49:55,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:49:55,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-11-06 22:49:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:55,229 INFO L225 Difference]: With dead ends: 4364 [2019-11-06 22:49:55,231 INFO L226 Difference]: Without dead ends: 2292 [2019-11-06 22:49:55,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:49:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2019-11-06 22:49:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2272. [2019-11-06 22:49:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2272 states. [2019-11-06 22:49:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3041 transitions. [2019-11-06 22:49:55,313 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3041 transitions. Word has length 324 [2019-11-06 22:49:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:55,315 INFO L462 AbstractCegarLoop]: Abstraction has 2272 states and 3041 transitions. [2019-11-06 22:49:55,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3041 transitions. [2019-11-06 22:49:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-06 22:49:55,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:55,339 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2019-11-06 22:49:55,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:55,543 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-11-06 22:49:55,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:55,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530039133] [2019-11-06 22:49:55,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 242 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:49:56,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530039133] [2019-11-06 22:49:56,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503160439] [2019-11-06 22:49:56,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:56,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 22:49:56,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:56,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:49:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 330 proven. 53 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 22:49:56,925 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:56,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 22:49:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 164 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:49:57,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1661166924] [2019-11-06 22:49:57,510 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 409 [2019-11-06 22:49:57,567 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:49:57,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)