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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:45:51,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:45:51,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:45:51,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:45:51,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:45:51,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:45:51,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:45:51,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:45:51,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:45:51,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:45:51,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:45:51,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:45:51,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:45:51,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:45:51,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:45:51,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:45:51,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:45:51,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:45:51,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:45:51,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:45:51,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:45:51,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:45:51,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:45:51,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:45:51,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:45:51,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:45:51,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:45:51,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:45:51,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:45:51,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:45:51,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:45:51,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:45:51,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:45:51,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:45:51,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:45:51,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:45:51,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:45:51,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:45:51,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:45:51,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:45:51,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:45:51,305 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 [2019-10-13 19:45:51,339 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:45:51,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:45:51,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:45:51,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:45:51,343 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:45:51,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:45:51,344 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:45:51,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:45:51,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:45:51,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:45:51,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:45:51,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:45:51,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:45:51,345 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:45:51,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:45:51,345 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:45:51,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:45:51,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:45:51,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:45:51,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:45:51,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:45:51,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:45:51,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:45:51,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:45:51,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:45:51,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:45:51,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:45:51,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:45:51,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:45:51,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:45:51,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:45:51,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:45:51,707 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:45:51,707 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:45:51,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:51,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/486cd3711/4e749cdf13ba444682adebb7b305fd15/FLAG095f03005 [2019-10-13 19:45:52,309 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:45:52,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:52,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/486cd3711/4e749cdf13ba444682adebb7b305fd15/FLAG095f03005 [2019-10-13 19:45:52,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/486cd3711/4e749cdf13ba444682adebb7b305fd15 [2019-10-13 19:45:52,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:45:52,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:45:52,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:52,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:45:52,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:45:52,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:52" (1/1) ... [2019-10-13 19:45:52,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69137f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:52, skipping insertion in model container [2019-10-13 19:45:52,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:52" (1/1) ... [2019-10-13 19:45:52,665 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:45:52,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:45:53,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:53,214 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:45:53,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:53,310 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:45:53,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53 WrapperNode [2019-10-13 19:45:53,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:53,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:45:53,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:45:53,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:45:53,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (1/1) ... [2019-10-13 19:45:53,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:45:53,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:45:53,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:45:53,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:45:53,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (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 [2019-10-13 19:45:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:45:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:45:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:45:53,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:45:53,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 19:45:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 19:45:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 19:45:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 19:45:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 19:45:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:45:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 19:45:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:45:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:45:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:45:54,332 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:45:54,333 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:45:54,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:54 BoogieIcfgContainer [2019-10-13 19:45:54,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:45:54,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:45:54,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:45:54,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:45:54,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:52" (1/3) ... [2019-10-13 19:45:54,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c58fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:54, skipping insertion in model container [2019-10-13 19:45:54,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:53" (2/3) ... [2019-10-13 19:45:54,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c58fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:54, skipping insertion in model container [2019-10-13 19:45:54,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:54" (3/3) ... [2019-10-13 19:45:54,351 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-13 19:45:54,361 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:45:54,385 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:45:54,397 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:45:54,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:45:54,422 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:45:54,422 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:45:54,422 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:45:54,423 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:45:54,423 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:45:54,423 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:45:54,423 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:45:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2019-10-13 19:45:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 19:45:54,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:54,453 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] [2019-10-13 19:45:54,455 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1085569870, now seen corresponding path program 1 times [2019-10-13 19:45:54,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:54,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15008801] [2019-10-13 19:45:54,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:54,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:54,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:55,227 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:45:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:55,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15008801] [2019-10-13 19:45:55,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:55,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:55,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66457766] [2019-10-13 19:45:55,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:55,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:55,351 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2019-10-13 19:45:55,689 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:45:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:56,580 INFO L93 Difference]: Finished difference Result 342 states and 566 transitions. [2019-10-13 19:45:56,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:56,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-10-13 19:45:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:56,597 INFO L225 Difference]: With dead ends: 342 [2019-10-13 19:45:56,597 INFO L226 Difference]: Without dead ends: 235 [2019-10-13 19:45:56,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-10-13 19:45:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2019-10-13 19:45:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-13 19:45:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 363 transitions. [2019-10-13 19:45:56,673 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 363 transitions. Word has length 60 [2019-10-13 19:45:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:56,674 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 363 transitions. [2019-10-13 19:45:56,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 363 transitions. [2019-10-13 19:45:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 19:45:56,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:56,678 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] [2019-10-13 19:45:56,678 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1093309265, now seen corresponding path program 1 times [2019-10-13 19:45:56,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:56,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937478295] [2019-10-13 19:45:56,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:56,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:56,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:57,069 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:45:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:57,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937478295] [2019-10-13 19:45:57,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:57,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:57,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331567578] [2019-10-13 19:45:57,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:57,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:57,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:57,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:57,119 INFO L87 Difference]: Start difference. First operand 232 states and 363 transitions. Second operand 4 states. [2019-10-13 19:45:57,350 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:45:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:58,018 INFO L93 Difference]: Finished difference Result 570 states and 915 transitions. [2019-10-13 19:45:58,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:58,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-10-13 19:45:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:58,023 INFO L225 Difference]: With dead ends: 570 [2019-10-13 19:45:58,023 INFO L226 Difference]: Without dead ends: 393 [2019-10-13 19:45:58,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2019-10-13 19:45:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2019-10-13 19:45:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-10-13 19:45:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 618 transitions. [2019-10-13 19:45:58,065 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 618 transitions. Word has length 62 [2019-10-13 19:45:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:58,066 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 618 transitions. [2019-10-13 19:45:58,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 618 transitions. [2019-10-13 19:45:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 19:45:58,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:58,070 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] [2019-10-13 19:45:58,070 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash 647852560, now seen corresponding path program 1 times [2019-10-13 19:45:58,071 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:58,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787262134] [2019-10-13 19:45:58,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:58,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:58,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:58,389 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:45:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:58,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787262134] [2019-10-13 19:45:58,411 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:58,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:58,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354728265] [2019-10-13 19:45:58,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:58,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:58,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:58,413 INFO L87 Difference]: Start difference. First operand 389 states and 618 transitions. Second operand 4 states. [2019-10-13 19:45:58,671 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:45:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:59,346 INFO L93 Difference]: Finished difference Result 1025 states and 1652 transitions. [2019-10-13 19:45:59,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:59,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-13 19:45:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:59,352 INFO L225 Difference]: With dead ends: 1025 [2019-10-13 19:45:59,352 INFO L226 Difference]: Without dead ends: 691 [2019-10-13 19:45:59,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-10-13 19:45:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 685. [2019-10-13 19:45:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-13 19:45:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1094 transitions. [2019-10-13 19:45:59,408 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1094 transitions. Word has length 64 [2019-10-13 19:45:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:59,409 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1094 transitions. [2019-10-13 19:45:59,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1094 transitions. [2019-10-13 19:45:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 19:45:59,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:59,412 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] [2019-10-13 19:45:59,412 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -971934415, now seen corresponding path program 1 times [2019-10-13 19:45:59,413 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:59,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063748705] [2019-10-13 19:45:59,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:59,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:59,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:59,775 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:45:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:59,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063748705] [2019-10-13 19:45:59,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:59,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:45:59,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441639043] [2019-10-13 19:45:59,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:45:59,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:45:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:45:59,798 INFO L87 Difference]: Start difference. First operand 685 states and 1094 transitions. Second operand 6 states. [2019-10-13 19:46:00,026 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:46:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:00,745 INFO L93 Difference]: Finished difference Result 2313 states and 3756 transitions. [2019-10-13 19:46:00,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:00,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-10-13 19:46:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:00,757 INFO L225 Difference]: With dead ends: 2313 [2019-10-13 19:46:00,758 INFO L226 Difference]: Without dead ends: 1683 [2019-10-13 19:46:00,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2019-10-13 19:46:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1500. [2019-10-13 19:46:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2019-10-13 19:46:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2423 transitions. [2019-10-13 19:46:00,880 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2423 transitions. Word has length 66 [2019-10-13 19:46:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:00,882 INFO L462 AbstractCegarLoop]: Abstraction has 1500 states and 2423 transitions. [2019-10-13 19:46:00,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:46:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2423 transitions. [2019-10-13 19:46:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 19:46:00,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:00,890 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] [2019-10-13 19:46:00,890 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash -126806256, now seen corresponding path program 1 times [2019-10-13 19:46:00,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:00,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445416800] [2019-10-13 19:46:00,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:00,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:00,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:01,195 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:01,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445416800] [2019-10-13 19:46:01,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:01,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:46:01,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519081585] [2019-10-13 19:46:01,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:46:01,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:46:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:01,218 INFO L87 Difference]: Start difference. First operand 1500 states and 2423 transitions. Second operand 7 states. [2019-10-13 19:46:01,466 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-10-13 19:46:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:02,722 INFO L93 Difference]: Finished difference Result 5957 states and 9657 transitions. [2019-10-13 19:46:02,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:46:02,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-10-13 19:46:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:02,748 INFO L225 Difference]: With dead ends: 5957 [2019-10-13 19:46:02,749 INFO L226 Difference]: Without dead ends: 4512 [2019-10-13 19:46:02,754 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:46:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2019-10-13 19:46:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4409. [2019-10-13 19:46:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4409 states. [2019-10-13 19:46:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 7126 transitions. [2019-10-13 19:46:03,094 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 7126 transitions. Word has length 67 [2019-10-13 19:46:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:03,095 INFO L462 AbstractCegarLoop]: Abstraction has 4409 states and 7126 transitions. [2019-10-13 19:46:03,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:46:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 7126 transitions. [2019-10-13 19:46:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 19:46:03,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:03,098 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] [2019-10-13 19:46:03,098 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 306920920, now seen corresponding path program 1 times [2019-10-13 19:46:03,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:03,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266292151] [2019-10-13 19:46:03,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:03,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:03,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:03,462 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:03,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266292151] [2019-10-13 19:46:03,483 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:03,484 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:03,484 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708411215] [2019-10-13 19:46:03,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:03,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:03,485 INFO L87 Difference]: Start difference. First operand 4409 states and 7126 transitions. Second operand 5 states. [2019-10-13 19:46:03,703 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-13 19:46:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:04,621 INFO L93 Difference]: Finished difference Result 10298 states and 16697 transitions. [2019-10-13 19:46:04,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:46:04,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-13 19:46:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:04,667 INFO L225 Difference]: With dead ends: 10298 [2019-10-13 19:46:04,667 INFO L226 Difference]: Without dead ends: 6343 [2019-10-13 19:46:04,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2019-10-13 19:46:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6316. [2019-10-13 19:46:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6316 states. [2019-10-13 19:46:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 10205 transitions. [2019-10-13 19:46:05,057 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 10205 transitions. Word has length 68 [2019-10-13 19:46:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:05,058 INFO L462 AbstractCegarLoop]: Abstraction has 6316 states and 10205 transitions. [2019-10-13 19:46:05,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 10205 transitions. [2019-10-13 19:46:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 19:46:05,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:05,061 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] [2019-10-13 19:46:05,061 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash 872119511, now seen corresponding path program 1 times [2019-10-13 19:46:05,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:05,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731232188] [2019-10-13 19:46:05,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:05,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:05,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:05,336 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:05,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731232188] [2019-10-13 19:46:05,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:05,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:05,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431387767] [2019-10-13 19:46:05,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:05,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:05,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:05,366 INFO L87 Difference]: Start difference. First operand 6316 states and 10205 transitions. Second operand 5 states. [2019-10-13 19:46:05,659 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-13 19:46:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:06,682 INFO L93 Difference]: Finished difference Result 18451 states and 29920 transitions. [2019-10-13 19:46:06,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:46:06,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-13 19:46:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:06,764 INFO L225 Difference]: With dead ends: 18451 [2019-10-13 19:46:06,764 INFO L226 Difference]: Without dead ends: 12686 [2019-10-13 19:46:06,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2019-10-13 19:46:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 8636. [2019-10-13 19:46:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8636 states. [2019-10-13 19:46:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 13951 transitions. [2019-10-13 19:46:07,199 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 13951 transitions. Word has length 69 [2019-10-13 19:46:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:07,199 INFO L462 AbstractCegarLoop]: Abstraction has 8636 states and 13951 transitions. [2019-10-13 19:46:07,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 13951 transitions. [2019-10-13 19:46:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 19:46:07,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:07,202 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] [2019-10-13 19:46:07,202 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1806428220, now seen corresponding path program 1 times [2019-10-13 19:46:07,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:07,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362928721] [2019-10-13 19:46:07,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:07,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:07,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:07,441 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:07,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362928721] [2019-10-13 19:46:07,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:07,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:07,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108450301] [2019-10-13 19:46:07,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:07,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:07,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:07,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:07,461 INFO L87 Difference]: Start difference. First operand 8636 states and 13951 transitions. Second operand 4 states. [2019-10-13 19:46:07,719 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:46:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:08,716 INFO L93 Difference]: Finished difference Result 19227 states and 31095 transitions. [2019-10-13 19:46:08,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:08,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-13 19:46:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:08,748 INFO L225 Difference]: With dead ends: 19227 [2019-10-13 19:46:08,748 INFO L226 Difference]: Without dead ends: 12825 [2019-10-13 19:46:08,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12825 states. [2019-10-13 19:46:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12825 to 12823. [2019-10-13 19:46:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12823 states. [2019-10-13 19:46:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12823 states to 12823 states and 20604 transitions. [2019-10-13 19:46:09,312 INFO L78 Accepts]: Start accepts. Automaton has 12823 states and 20604 transitions. Word has length 70 [2019-10-13 19:46:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:09,313 INFO L462 AbstractCegarLoop]: Abstraction has 12823 states and 20604 transitions. [2019-10-13 19:46:09,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 12823 states and 20604 transitions. [2019-10-13 19:46:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 19:46:09,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:09,320 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] [2019-10-13 19:46:09,320 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -552777714, now seen corresponding path program 1 times [2019-10-13 19:46:09,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:09,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730360822] [2019-10-13 19:46:09,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:09,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:09,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:09,563 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:09,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730360822] [2019-10-13 19:46:09,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:09,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:09,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586735843] [2019-10-13 19:46:09,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:09,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:09,598 INFO L87 Difference]: Start difference. First operand 12823 states and 20604 transitions. Second operand 4 states. [2019-10-13 19:46:09,843 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:46:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:11,083 INFO L93 Difference]: Finished difference Result 27737 states and 44670 transitions. [2019-10-13 19:46:11,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:11,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-13 19:46:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:11,130 INFO L225 Difference]: With dead ends: 27737 [2019-10-13 19:46:11,131 INFO L226 Difference]: Without dead ends: 18500 [2019-10-13 19:46:11,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18500 states. [2019-10-13 19:46:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18500 to 18498. [2019-10-13 19:46:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18498 states. [2019-10-13 19:46:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 29596 transitions. [2019-10-13 19:46:12,359 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 29596 transitions. Word has length 70 [2019-10-13 19:46:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:12,359 INFO L462 AbstractCegarLoop]: Abstraction has 18498 states and 29596 transitions. [2019-10-13 19:46:12,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 29596 transitions. [2019-10-13 19:46:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 19:46:12,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:12,360 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] [2019-10-13 19:46:12,361 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1170468960, now seen corresponding path program 1 times [2019-10-13 19:46:12,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:12,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874726894] [2019-10-13 19:46:12,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:12,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:12,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:12,689 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:12,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874726894] [2019-10-13 19:46:12,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:12,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:12,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895089625] [2019-10-13 19:46:12,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:12,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:12,715 INFO L87 Difference]: Start difference. First operand 18498 states and 29596 transitions. Second operand 4 states. [2019-10-13 19:46:12,955 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-13 19:46:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:14,392 INFO L93 Difference]: Finished difference Result 42427 states and 68162 transitions. [2019-10-13 19:46:14,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:14,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-13 19:46:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:14,453 INFO L225 Difference]: With dead ends: 42427 [2019-10-13 19:46:14,454 INFO L226 Difference]: Without dead ends: 27744 [2019-10-13 19:46:14,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2019-10-13 19:46:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 27742. [2019-10-13 19:46:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-10-13 19:46:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44151 transitions. [2019-10-13 19:46:15,257 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44151 transitions. Word has length 70 [2019-10-13 19:46:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:15,257 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44151 transitions. [2019-10-13 19:46:15,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44151 transitions. [2019-10-13 19:46:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 19:46:15,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:15,258 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] [2019-10-13 19:46:15,258 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash -901408249, now seen corresponding path program 1 times [2019-10-13 19:46:15,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:15,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897738353] [2019-10-13 19:46:15,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:15,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:15,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:15,526 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-10-13 19:46:15,817 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:15,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897738353] [2019-10-13 19:46:15,860 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:15,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:15,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739707243] [2019-10-13 19:46:15,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:15,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:15,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:15,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:15,862 INFO L87 Difference]: Start difference. First operand 27742 states and 44151 transitions. Second operand 6 states. [2019-10-13 19:46:16,176 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-10-13 19:46:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:17,590 INFO L93 Difference]: Finished difference Result 57487 states and 91562 transitions. [2019-10-13 19:46:17,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:17,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2019-10-13 19:46:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:17,635 INFO L225 Difference]: With dead ends: 57487 [2019-10-13 19:46:17,636 INFO L226 Difference]: Without dead ends: 29834 [2019-10-13 19:46:17,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29834 states. [2019-10-13 19:46:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29834 to 27742. [2019-10-13 19:46:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-10-13 19:46:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44016 transitions. [2019-10-13 19:46:18,418 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44016 transitions. Word has length 71 [2019-10-13 19:46:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:18,418 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44016 transitions. [2019-10-13 19:46:18,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:46:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44016 transitions. [2019-10-13 19:46:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 19:46:18,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:18,419 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] [2019-10-13 19:46:18,420 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:18,420 INFO L82 PathProgramCache]: Analyzing trace with hash 527849417, now seen corresponding path program 1 times [2019-10-13 19:46:18,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:18,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100704780] [2019-10-13 19:46:18,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:18,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:18,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:19,135 WARN L191 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:19,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100704780] [2019-10-13 19:46:19,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:19,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:19,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305846330] [2019-10-13 19:46:19,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:19,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:19,183 INFO L87 Difference]: Start difference. First operand 27742 states and 44016 transitions. Second operand 6 states. [2019-10-13 19:46:19,515 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-13 19:46:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:21,668 INFO L93 Difference]: Finished difference Result 89911 states and 143015 transitions. [2019-10-13 19:46:21,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:21,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2019-10-13 19:46:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:21,770 INFO L225 Difference]: With dead ends: 89911 [2019-10-13 19:46:21,770 INFO L226 Difference]: Without dead ends: 62258 [2019-10-13 19:46:21,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62258 states. [2019-10-13 19:46:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62258 to 38998. [2019-10-13 19:46:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38998 states. [2019-10-13 19:46:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38998 states to 38998 states and 61670 transitions. [2019-10-13 19:46:24,227 INFO L78 Accepts]: Start accepts. Automaton has 38998 states and 61670 transitions. Word has length 74 [2019-10-13 19:46:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:24,227 INFO L462 AbstractCegarLoop]: Abstraction has 38998 states and 61670 transitions. [2019-10-13 19:46:24,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:46:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38998 states and 61670 transitions. [2019-10-13 19:46:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 19:46:24,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:24,228 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] [2019-10-13 19:46:24,229 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash -818446556, now seen corresponding path program 1 times [2019-10-13 19:46:24,229 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:24,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220086153] [2019-10-13 19:46:24,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:24,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:24,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:24,524 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-13 19:46:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:24,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220086153] [2019-10-13 19:46:24,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:24,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:24,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795813145] [2019-10-13 19:46:24,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:24,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:24,541 INFO L87 Difference]: Start difference. First operand 38998 states and 61670 transitions. Second operand 6 states.