/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:32:43,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:32:43,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:32:43,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:32:43,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:32:43,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:32:43,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:32:43,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:32:43,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:32:43,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:32:43,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:32:43,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:32:43,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:32:43,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:32:43,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:32:43,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:32:43,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:32:43,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:32:43,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:32:43,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:32:43,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:32:43,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:32:43,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:32:43,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:32:43,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:32:43,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:32:43,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:32:43,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:32:43,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:32:43,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:32:43,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:32:43,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:32:43,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:32:43,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:32:43,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:32:43,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:32:43,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:32:43,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:32:43,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:32:43,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:32:43,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:32:43,080 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 [2020-08-21 21:32:43,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:32:43,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:32:43,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:32:43,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:32:43,106 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:32:43,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:32:43,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:32:43,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:32:43,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:32:43,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:32:43,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:32:43,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:32:43,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:32:43,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:32:43,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:32:43,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:32:43,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:32:43,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:32:43,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:32:43,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:32:43,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:32:43,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:32:43,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:32:43,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:32:43,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:32:43,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:32:43,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:32:43,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:32:43,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:32:43,111 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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:32:43,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:32:43,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:32:43,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:32:43,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:32:43,437 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:32:43,438 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 21:32:43,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cd6b7b47/be2966d2c0a349739b58ad094d901be3/FLAG9c46eb066 [2020-08-21 21:32:44,218 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:32:44,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 21:32:44,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cd6b7b47/be2966d2c0a349739b58ad094d901be3/FLAG9c46eb066 [2020-08-21 21:32:44,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cd6b7b47/be2966d2c0a349739b58ad094d901be3 [2020-08-21 21:32:44,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:32:44,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:32:44,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:32:44,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:32:44,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:32:44,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:44" (1/1) ... [2020-08-21 21:32:44,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317b59db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:44, skipping insertion in model container [2020-08-21 21:32:44,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:44" (1/1) ... [2020-08-21 21:32:44,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:32:44,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:32:45,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:32:45,603 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:32:46,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:32:46,089 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:32:46,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46 WrapperNode [2020-08-21 21:32:46,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:32:46,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:32:46,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:32:46,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:32:46,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ... [2020-08-21 21:32:46,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:32:46,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:32:46,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:32:46,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:32:46,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (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 [2020-08-21 21:32:46,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:32:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:32:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 21:32:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:32:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:32:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 21:32:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 21:32:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 21:32:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 21:32:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:32:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 21:32:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 21:32:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 21:32:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 21:32:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 21:32:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 21:32:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-21 21:32:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 21:32:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 21:32:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:32:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:32:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:32:49,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:32:49,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:32:49,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:49 BoogieIcfgContainer [2020-08-21 21:32:49,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:32:49,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:32:49,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:32:49,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:32:49,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:32:44" (1/3) ... [2020-08-21 21:32:49,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9d87c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:49, skipping insertion in model container [2020-08-21 21:32:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (2/3) ... [2020-08-21 21:32:49,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9d87c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:49, skipping insertion in model container [2020-08-21 21:32:49,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:49" (3/3) ... [2020-08-21 21:32:49,247 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-21 21:32:49,258 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:32:49,269 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:32:49,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:32:49,311 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:32:49,312 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:32:49,312 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:32:49,312 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:32:49,312 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:32:49,312 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:32:49,313 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:32:49,313 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:32:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-08-21 21:32:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-21 21:32:49,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:49,374 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, 1] [2020-08-21 21:32:49,374 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-08-21 21:32:49,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:49,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799351975] [2020-08-21 21:32:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:51,115 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:32:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:51,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799351975] [2020-08-21 21:32:51,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:51,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:51,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806446250] [2020-08-21 21:32:51,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:51,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:51,359 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-08-21 21:32:51,860 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 21:32:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:32:57,209 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-08-21 21:32:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:32:57,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-21 21:32:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:32:57,250 INFO L225 Difference]: With dead ends: 1527 [2020-08-21 21:32:57,250 INFO L226 Difference]: Without dead ends: 1311 [2020-08-21 21:32:57,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:32:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-08-21 21:32:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-08-21 21:32:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-08-21 21:32:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-08-21 21:32:57,409 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-08-21 21:32:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:32:57,414 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-08-21 21:32:57,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:32:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-08-21 21:32:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-21 21:32:57,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:32:57,422 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, 1] [2020-08-21 21:32:57,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:32:57,423 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:32:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:32:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-08-21 21:32:57,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:32:57,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037300395] [2020-08-21 21:32:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:32:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:58,563 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:32:58,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:32:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:32:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:32:58,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037300395] [2020-08-21 21:32:58,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:32:58,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:32:58,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440259775] [2020-08-21 21:32:58,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:32:58,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:32:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:32:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:32:58,765 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-08-21 21:32:59,590 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 21:33:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:04,324 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-08-21 21:33:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:04,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-21 21:33:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:04,345 INFO L225 Difference]: With dead ends: 2683 [2020-08-21 21:33:04,346 INFO L226 Difference]: Without dead ends: 2301 [2020-08-21 21:33:04,357 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 [2020-08-21 21:33:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-08-21 21:33:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-08-21 21:33:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-08-21 21:33:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-08-21 21:33:04,504 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-08-21 21:33:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:04,507 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-08-21 21:33:04,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-08-21 21:33:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-21 21:33:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:04,528 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, 1] [2020-08-21 21:33:04,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:33:04,529 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-08-21 21:33:04,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:04,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241634003] [2020-08-21 21:33:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:05,868 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:33:05,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:06,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241634003] [2020-08-21 21:33:06,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:06,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:33:06,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399048700] [2020-08-21 21:33:06,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:33:06,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:06,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:33:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:06,159 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-08-21 21:33:06,615 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-21 21:33:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:10,828 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-08-21 21:33:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:10,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-21 21:33:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:10,850 INFO L225 Difference]: With dead ends: 4867 [2020-08-21 21:33:10,851 INFO L226 Difference]: Without dead ends: 4201 [2020-08-21 21:33:10,853 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 [2020-08-21 21:33:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-08-21 21:33:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-08-21 21:33:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-08-21 21:33:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-08-21 21:33:10,992 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-08-21 21:33:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:10,993 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-08-21 21:33:10,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-08-21 21:33:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-21 21:33:11,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:11,006 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, 1] [2020-08-21 21:33:11,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:33:11,006 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-08-21 21:33:11,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:11,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000006038] [2020-08-21 21:33:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:11,983 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:33:11,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:12,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000006038] [2020-08-21 21:33:12,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:12,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:33:12,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882598702] [2020-08-21 21:33:12,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:33:12,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:33:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:33:12,233 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-08-21 21:33:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:19,400 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-08-21 21:33:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:33:19,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-21 21:33:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:19,437 INFO L225 Difference]: With dead ends: 12414 [2020-08-21 21:33:19,437 INFO L226 Difference]: Without dead ends: 8230 [2020-08-21 21:33:19,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:33:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-08-21 21:33:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-08-21 21:33:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-08-21 21:33:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-08-21 21:33:19,842 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-08-21 21:33:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:19,843 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-08-21 21:33:19,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:33:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-08-21 21:33:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-21 21:33:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:19,861 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, 1, 1, 1] [2020-08-21 21:33:19,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:33:19,861 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-08-21 21:33:19,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:19,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091849456] [2020-08-21 21:33:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:20,573 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:33:20,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091849456] [2020-08-21 21:33:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:33:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387590810] [2020-08-21 21:33:20,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:33:20,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:33:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:20,715 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-08-21 21:33:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:28,968 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-08-21 21:33:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:33:28,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-21 21:33:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:29,029 INFO L225 Difference]: With dead ends: 24233 [2020-08-21 21:33:29,030 INFO L226 Difference]: Without dead ends: 16134 [2020-08-21 21:33:29,048 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 [2020-08-21 21:33:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-08-21 21:33:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-08-21 21:33:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-08-21 21:33:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-08-21 21:33:29,549 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-08-21 21:33:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:29,550 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-08-21 21:33:29,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-08-21 21:33:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-21 21:33:29,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:29,585 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, 1, 1, 1] [2020-08-21 21:33:29,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:33:29,590 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-08-21 21:33:29,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:29,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777299689] [2020-08-21 21:33:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:30,348 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:33:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:33:30,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777299689] [2020-08-21 21:33:30,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:33:30,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:33:30,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823559773] [2020-08-21 21:33:30,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:33:30,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:33:30,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:33:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:30,446 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-08-21 21:33:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:33:39,863 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-08-21 21:33:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:33:39,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-21 21:33:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:33:39,933 INFO L225 Difference]: With dead ends: 48321 [2020-08-21 21:33:39,933 INFO L226 Difference]: Without dead ends: 32231 [2020-08-21 21:33:39,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:33:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-08-21 21:33:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-08-21 21:33:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-08-21 21:33:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-08-21 21:33:40,710 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-08-21 21:33:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:33:40,711 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-08-21 21:33:40,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:33:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-08-21 21:33:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-21 21:33:40,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:33:40,741 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, 1, 1, 1, 1] [2020-08-21 21:33:40,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:33:40,742 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:33:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:33:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-08-21 21:33:40,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:33:40,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955944139] [2020-08-21 21:33:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:33:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:33:41,291 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-21 21:33:41,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:33:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat