/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:45:13,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:45:13,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:45:13,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:45:13,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:45:13,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:45:13,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:45:13,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:45:13,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:45:13,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:45:13,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:45:13,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:45:13,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:45:13,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:45:13,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:45:13,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:45:13,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:45:13,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:45:13,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:45:13,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:45:13,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:45:13,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:45:13,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:45:13,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:45:13,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:45:13,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:45:13,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:45:13,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:45:13,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:45:13,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:45:13,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:45:13,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:45:13,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:45:13,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:45:13,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:45:13,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:45:13,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:45:13,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:45:13,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:45:13,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:45:13,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:45:13,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:45:13,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:45:13,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:45:13,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:45:13,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:45:13,267 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:45:13,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:45:13,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:45:13,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:45:13,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:45:13,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:45:13,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:45:13,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:45:13,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:45:13,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:45:13,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:45:13,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:45:13,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:45:13,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:45:13,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:45:13,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:45:13,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:45:13,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:45:13,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:45:13,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:45:13,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:45:13,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:45:13,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:45:13,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:45:13,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:45:13,617 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:45:13,618 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 03:45:13,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ec16cba/60e0f258b4c245899b3cf776bbd38389/FLAGbcccb1d1c [2020-08-19 03:45:14,281 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:45:14,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 03:45:14,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ec16cba/60e0f258b4c245899b3cf776bbd38389/FLAGbcccb1d1c [2020-08-19 03:45:14,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ec16cba/60e0f258b4c245899b3cf776bbd38389 [2020-08-19 03:45:14,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:45:14,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:45:14,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:45:14,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:45:14,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:45:14,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:45:14" (1/1) ... [2020-08-19 03:45:14,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f812a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:14, skipping insertion in model container [2020-08-19 03:45:14,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:45:14" (1/1) ... [2020-08-19 03:45:14,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:45:14,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:45:15,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:45:15,803 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:45:16,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:45:16,334 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:45:16,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16 WrapperNode [2020-08-19 03:45:16,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:45:16,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:45:16,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:45:16,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:45:16,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... [2020-08-19 03:45:16,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:45:16,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:45:16,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:45:16,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:45:16,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 03:45:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:45:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:45:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 03:45:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:45:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:45:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 03:45:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-19 03:45:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 03:45:16,665 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 03:45:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 03:45:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 03:45:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 03:45:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 03:45:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 03:45:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 03:45:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 03:45:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-19 03:45:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 03:45:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 03:45:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:45:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:45:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:45:19,615 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:45:19,615 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 03:45:19,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:45:19 BoogieIcfgContainer [2020-08-19 03:45:19,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:45:19,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:45:19,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:45:19,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:45:19,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:45:14" (1/3) ... [2020-08-19 03:45:19,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6868035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:45:19, skipping insertion in model container [2020-08-19 03:45:19,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:45:16" (2/3) ... [2020-08-19 03:45:19,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6868035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:45:19, skipping insertion in model container [2020-08-19 03:45:19,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:45:19" (3/3) ... [2020-08-19 03:45:19,643 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-19 03:45:19,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:45:19,659 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:45:19,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:45:19,699 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:45:19,700 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:45:19,700 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:45:19,700 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:45:19,700 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:45:19,700 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:45:19,700 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:45:19,701 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:45:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-19 03:45:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 03:45:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:45:19,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:45:19,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:45:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:45:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-19 03:45:19,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:45:19,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514120285] [2020-08-19 03:45:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:45:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:21,508 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:45:21,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:45:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:45:21,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514120285] [2020-08-19 03:45:21,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:45:21,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:45:21,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392776219] [2020-08-19 03:45:21,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:45:21,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:45:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:45:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:45:21,789 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-19 03:45:22,407 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 03:45:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:45:27,674 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-19 03:45:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:45:27,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 03:45:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:45:27,726 INFO L225 Difference]: With dead ends: 1489 [2020-08-19 03:45:27,727 INFO L226 Difference]: Without dead ends: 1273 [2020-08-19 03:45:27,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:45:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-19 03:45:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-19 03:45:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-19 03:45:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-19 03:45:27,887 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-19 03:45:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:45:27,889 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-19 03:45:27,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:45:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-19 03:45:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 03:45:27,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:45:27,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:45:27,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:45:27,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:45:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:45:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-19 03:45:27,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:45:27,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560225312] [2020-08-19 03:45:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:45:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:29,198 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:45:29,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:45:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:45:29,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560225312] [2020-08-19 03:45:29,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:45:29,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:45:29,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64826750] [2020-08-19 03:45:29,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:45:29,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:45:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:45:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:45:29,531 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-19 03:45:30,271 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 03:45:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:45:34,627 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-19 03:45:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:45:34,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 03:45:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:45:34,649 INFO L225 Difference]: With dead ends: 2607 [2020-08-19 03:45:34,650 INFO L226 Difference]: Without dead ends: 2225 [2020-08-19 03:45:34,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:45:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-19 03:45:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-19 03:45:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-19 03:45:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-19 03:45:34,786 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-19 03:45:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:45:34,789 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-19 03:45:34,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:45:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-19 03:45:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 03:45:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:45:34,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:45:34,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:45:34,812 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:45:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:45:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-19 03:45:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:45:34,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145623781] [2020-08-19 03:45:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:45:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:36,346 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:45:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:45:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:45:36,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145623781] [2020-08-19 03:45:36,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:45:36,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:45:36,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569536045] [2020-08-19 03:45:36,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:45:36,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:45:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:45:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:45:36,648 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-19 03:45:37,256 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-19 03:45:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:45:41,261 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-19 03:45:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:45:41,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-19 03:45:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:45:41,284 INFO L225 Difference]: With dead ends: 4715 [2020-08-19 03:45:41,284 INFO L226 Difference]: Without dead ends: 4049 [2020-08-19 03:45:41,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:45:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-19 03:45:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-19 03:45:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-19 03:45:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-19 03:45:41,432 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-19 03:45:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:45:41,433 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-19 03:45:41,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:45:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-19 03:45:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-19 03:45:41,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:45:41,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:45:41,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:45:41,450 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:45:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:45:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-19 03:45:41,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:45:41,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561995539] [2020-08-19 03:45:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:45:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:42,642 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:45:42,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:45:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:45:42,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561995539] [2020-08-19 03:45:42,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:45:42,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:45:42,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28438808] [2020-08-19 03:45:42,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:45:42,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:45:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:45:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:45:42,818 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-19 03:45:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:45:50,388 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-19 03:45:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:45:50,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-19 03:45:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:45:50,426 INFO L225 Difference]: With dead ends: 11998 [2020-08-19 03:45:50,426 INFO L226 Difference]: Without dead ends: 7966 [2020-08-19 03:45:50,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:45:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-19 03:45:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-19 03:45:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-19 03:45:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-19 03:45:50,768 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-19 03:45:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:45:50,768 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-19 03:45:50,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:45:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-19 03:45:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-19 03:45:50,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:45:50,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:45:50,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:45:50,791 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:45:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:45:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-19 03:45:50,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:45:50,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507499543] [2020-08-19 03:45:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:45:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:51,675 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:45:51,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:45:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:45:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:45:51,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507499543] [2020-08-19 03:45:51,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:45:51,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:45:51,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268613424] [2020-08-19 03:45:51,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:45:51,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:45:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:45:51,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:45:51,822 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-19 03:46:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:46:00,438 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-19 03:46:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:46:00,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-19 03:46:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:46:00,495 INFO L225 Difference]: With dead ends: 23441 [2020-08-19 03:46:00,495 INFO L226 Difference]: Without dead ends: 15606 [2020-08-19 03:46:00,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:46:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-19 03:46:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-19 03:46:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-19 03:46:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-19 03:46:01,107 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-19 03:46:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:46:01,108 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-19 03:46:01,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:46:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-19 03:46:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-19 03:46:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:46:01,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:46:01,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:46:01,145 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:46:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:46:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-19 03:46:01,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:46:01,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939768990] [2020-08-19 03:46:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:46:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:46:01,752 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:46:01,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:46:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:46:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:46:01,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939768990] [2020-08-19 03:46:01,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:46:01,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 03:46:01,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920794752] [2020-08-19 03:46:01,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:46:01,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:46:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:46:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:46:01,856 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-19 03:46:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:46:10,791 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-19 03:46:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:46:10,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-19 03:46:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:46:10,867 INFO L225 Difference]: With dead ends: 46737 [2020-08-19 03:46:10,867 INFO L226 Difference]: Without dead ends: 31175 [2020-08-19 03:46:10,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:46:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-19 03:46:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-19 03:46:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-19 03:46:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-19 03:46:11,612 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-19 03:46:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:46:11,612 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-19 03:46:11,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:46:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-19 03:46:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-19 03:46:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:46:11,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:46:11,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:46:11,643 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:46:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:46:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-19 03:46:11,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:46:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311068091] [2020-08-19 03:46:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:46:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:46:12,222 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-19 03:46:12,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:46:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat