/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:14:46,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:14:46,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:14:46,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:14:46,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:14:46,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:14:46,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:14:46,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:14:46,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:14:46,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:14:46,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:14:46,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:14:46,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:14:46,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:14:46,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:14:46,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:14:46,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:14:46,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:14:46,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:14:46,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:14:46,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:14:46,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:14:46,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:14:46,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:14:46,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:14:46,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:14:46,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:14:46,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:14:46,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:14:46,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:14:46,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:14:46,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:14:46,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:14:46,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:14:46,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:14:46,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:14:46,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:14:46,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:14:46,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:14:46,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:14:46,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:14:46,385 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 [2020-10-28 13:14:46,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:14:46,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:14:46,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:14:46,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:14:46,444 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:14:46,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:14:46,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:14:46,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:14:46,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:14:46,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:14:46,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:14:46,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:14:46,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:14:46,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:14:46,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:14:46,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:14:46,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:14:46,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:14:46,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:14:46,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:14:46,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:14:46,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:14:46,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:14:46,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:14:46,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:14:46,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:14:46,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:14:46,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:14:46,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:14:46,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:14:46,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:14:46,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:14:47,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:14:47,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:14:47,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:14:47,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-28 13:14:47,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/769b5cada/7d37f2a97adb47ca998a271b357c080d/FLAGea4b63880 [2020-10-28 13:14:48,177 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:14:48,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-28 13:14:48,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/769b5cada/7d37f2a97adb47ca998a271b357c080d/FLAGea4b63880 [2020-10-28 13:14:48,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/769b5cada/7d37f2a97adb47ca998a271b357c080d [2020-10-28 13:14:48,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:14:48,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:14:48,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:14:48,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:14:48,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:14:48,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:14:48" (1/1) ... [2020-10-28 13:14:48,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305c2c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:48, skipping insertion in model container [2020-10-28 13:14:48,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:14:48" (1/1) ... [2020-10-28 13:14:48,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:14:48,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:14:49,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:14:49,746 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:14:50,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:14:50,066 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:14:50,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50 WrapperNode [2020-10-28 13:14:50,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:14:50,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:14:50,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:14:50,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:14:50,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (1/1) ... [2020-10-28 13:14:50,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:14:50,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:14:50,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:14:50,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:14:50,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (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 [2020-10-28 13:14:50,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:14:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:14:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:14:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:14:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:14:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:14:50,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:14:50,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:14:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:14:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:14:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:14:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:14:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:14:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:14:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:14:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:14:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:14:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:14:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:14:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:14:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:14:54,435 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:14:54,435 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:14:54,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:14:54 BoogieIcfgContainer [2020-10-28 13:14:54,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:14:54,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:14:54,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:14:54,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:14:54,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:14:48" (1/3) ... [2020-10-28 13:14:54,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f5396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:14:54, skipping insertion in model container [2020-10-28 13:14:54,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:14:50" (2/3) ... [2020-10-28 13:14:54,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f5396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:14:54, skipping insertion in model container [2020-10-28 13:14:54,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:14:54" (3/3) ... [2020-10-28 13:14:54,450 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label59.c [2020-10-28 13:14:54,464 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:14:54,471 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:14:54,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:14:54,524 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:14:54,525 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:14:54,525 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:14:54,525 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:14:54,525 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:14:54,525 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:14:54,526 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:14:54,526 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:14:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:14:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 13:14:54,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:14:54,571 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] [2020-10-28 13:14:54,571 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:14:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:14:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 733240863, now seen corresponding path program 1 times [2020-10-28 13:14:54,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:14:54,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746831493] [2020-10-28 13:14:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:14:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:14:55,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-28 13:14:55,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:55,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:14:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:14:55,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 13:14:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:14:55,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:14:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:14:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:14:55,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:14:55,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:14:55,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:14:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 13:14:55,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:14:55,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:14:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:14:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:14:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:14:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:14:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:14:55,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746831493] [2020-10-28 13:14:55,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:14:55,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:14:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484240030] [2020-10-28 13:14:55,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:14:55,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:14:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:14:55,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:14:55,880 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:15:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:15:05,207 INFO L93 Difference]: Finished difference Result 1250 states and 2231 transitions. [2020-10-28 13:15:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:15:05,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 13:15:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:15:05,234 INFO L225 Difference]: With dead ends: 1250 [2020-10-28 13:15:05,235 INFO L226 Difference]: Without dead ends: 730 [2020-10-28 13:15:05,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:15:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-10-28 13:15:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 713. [2020-10-28 13:15:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 13:15:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1207 transitions. [2020-10-28 13:15:05,364 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1207 transitions. Word has length 61 [2020-10-28 13:15:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:15:05,365 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1207 transitions. [2020-10-28 13:15:05,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:15:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1207 transitions. [2020-10-28 13:15:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 13:15:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:15:05,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:15:05,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:15:05,374 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:15:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:15:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1522390967, now seen corresponding path program 1 times [2020-10-28 13:15:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:15:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295307994] [2020-10-28 13:15:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:15:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:05,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:08,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:08,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 13:15:08,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:15:08,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3231 [2020-10-28 13:15:08,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:08,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:08,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:15:08,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:15:08,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:15:08,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:08,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:15:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:08,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:08,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:15:08,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:15:08,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:08,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:15:08,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:15:08,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:15:08,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:08,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:15:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:09,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:15:09,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 13:15:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:09,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:15:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:15:09,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:15:09,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:15:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295307994] [2020-10-28 13:15:09,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:15:09,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:15:09,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318526375] [2020-10-28 13:15:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:15:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:15:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:15:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:15:09,206 INFO L87 Difference]: Start difference. First operand 713 states and 1207 transitions. Second operand 7 states. [2020-10-28 13:15:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:15:25,055 INFO L93 Difference]: Finished difference Result 1776 states and 3021 transitions. [2020-10-28 13:15:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:15:25,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-28 13:15:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:15:25,067 INFO L225 Difference]: With dead ends: 1776 [2020-10-28 13:15:25,067 INFO L226 Difference]: Without dead ends: 1069 [2020-10-28 13:15:25,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:15:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-10-28 13:15:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1042. [2020-10-28 13:15:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-10-28 13:15:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1663 transitions. [2020-10-28 13:15:25,154 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1663 transitions. Word has length 130 [2020-10-28 13:15:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:15:25,157 INFO L481 AbstractCegarLoop]: Abstraction has 1042 states and 1663 transitions. [2020-10-28 13:15:25,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:15:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1663 transitions. [2020-10-28 13:15:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 13:15:25,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:15:25,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:15:25,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:15:25,176 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:15:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:15:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1881862809, now seen corresponding path program 1 times [2020-10-28 13:15:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:15:25,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264796166] [2020-10-28 13:15:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:15:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:26,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:26,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 13:15:26,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:15:26,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-28 13:15:26,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:26,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:26,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:15:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:15:26,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:15:26,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:15:27,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:15:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:27,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:15:27,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 13:15:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:27,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:15:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:15:27,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:15:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:27,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:15:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:27,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:15:27,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:27,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 13:15:27,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:27,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:15:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:15:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 13:15:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:15:27,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264796166] [2020-10-28 13:15:27,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:15:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:15:27,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928676065] [2020-10-28 13:15:27,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:15:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:15:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:15:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:15:27,476 INFO L87 Difference]: Start difference. First operand 1042 states and 1663 transitions. Second operand 7 states. [2020-10-28 13:15:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:15:36,313 INFO L93 Difference]: Finished difference Result 2778 states and 4579 transitions. [2020-10-28 13:15:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:15:36,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-28 13:15:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:15:36,328 INFO L225 Difference]: With dead ends: 2778 [2020-10-28 13:15:36,328 INFO L226 Difference]: Without dead ends: 1742 [2020-10-28 13:15:36,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:15:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2020-10-28 13:15:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1674. [2020-10-28 13:15:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-28 13:15:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2330 transitions. [2020-10-28 13:15:36,415 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2330 transitions. Word has length 131 [2020-10-28 13:15:36,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:15:36,416 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2330 transitions. [2020-10-28 13:15:36,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:15:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2330 transitions. [2020-10-28 13:15:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 13:15:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:15:36,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:15:36,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:15:36,419 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:15:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:15:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1372673711, now seen corresponding path program 1 times [2020-10-28 13:15:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:15:36,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258695313] [2020-10-28 13:15:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:15:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:36,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:37,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:37,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 13:15:37,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:15:37,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-28 13:15:37,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:37,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:15:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:15:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:15:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:15:37,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:15:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:15:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:15:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:15:37,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:15:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:38,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:15:38,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-28 13:15:38,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:38,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:15:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:15:38,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:15:38,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 13:15:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:15:38,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258695313] [2020-10-28 13:15:38,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:15:38,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:15:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89279708] [2020-10-28 13:15:38,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:15:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:15:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:15:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:15:38,223 INFO L87 Difference]: Start difference. First operand 1674 states and 2330 transitions. Second operand 7 states. [2020-10-28 13:15:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:15:48,946 INFO L93 Difference]: Finished difference Result 4052 states and 6006 transitions. [2020-10-28 13:15:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:15:48,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-28 13:15:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:15:48,964 INFO L225 Difference]: With dead ends: 4052 [2020-10-28 13:15:48,964 INFO L226 Difference]: Without dead ends: 2691 [2020-10-28 13:15:48,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:15:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2020-10-28 13:15:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2322. [2020-10-28 13:15:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2322 states. [2020-10-28 13:15:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 3107 transitions. [2020-10-28 13:15:49,059 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 3107 transitions. Word has length 135 [2020-10-28 13:15:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:15:49,060 INFO L481 AbstractCegarLoop]: Abstraction has 2322 states and 3107 transitions. [2020-10-28 13:15:49,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:15:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 3107 transitions. [2020-10-28 13:15:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-28 13:15:49,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:15:49,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:15:49,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:15:49,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:15:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:15:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -391837973, now seen corresponding path program 1 times [2020-10-28 13:15:49,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:15:49,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816250230] [2020-10-28 13:15:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:15:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:49,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:49,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:49,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-28 13:15:49,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:15:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 13:15:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:15:49,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:15:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:49,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:49,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:15:49,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:49,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:15:49,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:49,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:15:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:15:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:15:49,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:15:49,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:15:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:15:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:15:50,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:15:50,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:15:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:15:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 13:15:50,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:15:50,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:15:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:15:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:15:50,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:15:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:15:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:15:50,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816250230] [2020-10-28 13:15:50,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:15:50,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:15:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132708892] [2020-10-28 13:15:50,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:15:50,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:15:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:15:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:15:50,125 INFO L87 Difference]: Start difference. First operand 2322 states and 3107 transitions. Second operand 5 states. [2020-10-28 13:16:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:16:01,142 INFO L93 Difference]: Finished difference Result 5914 states and 8218 transitions. [2020-10-28 13:16:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:16:01,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-28 13:16:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:16:01,167 INFO L225 Difference]: With dead ends: 5914 [2020-10-28 13:16:01,167 INFO L226 Difference]: Without dead ends: 3598 [2020-10-28 13:16:01,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:16:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2020-10-28 13:16:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3588. [2020-10-28 13:16:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3588 states. [2020-10-28 13:16:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 4593 transitions. [2020-10-28 13:16:01,311 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 4593 transitions. Word has length 156 [2020-10-28 13:16:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:16:01,312 INFO L481 AbstractCegarLoop]: Abstraction has 3588 states and 4593 transitions. [2020-10-28 13:16:01,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:16:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 4593 transitions. [2020-10-28 13:16:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-28 13:16:01,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:16:01,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:16:01,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:16:01,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:16:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:16:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1062871464, now seen corresponding path program 1 times [2020-10-28 13:16:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:16:01,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338138331] [2020-10-28 13:16:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:16:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:02,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:03,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:03,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-28 13:16:03,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:16:03,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2306 [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-28 13:16:03,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:03,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:16:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:03,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:03,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:03,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:16:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:16:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:03,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:16:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:04,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:04,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:04,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:16:04,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:04,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-28 13:16:04,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:04,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:16:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:16:04,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-28 13:16:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:16:04,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338138331] [2020-10-28 13:16:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:16:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:16:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490165001] [2020-10-28 13:16:04,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:16:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:16:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:16:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:16:04,840 INFO L87 Difference]: Start difference. First operand 3588 states and 4593 transitions. Second operand 8 states. [2020-10-28 13:16:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:16:20,673 INFO L93 Difference]: Finished difference Result 11313 states and 14724 transitions. [2020-10-28 13:16:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 13:16:20,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 298 [2020-10-28 13:16:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:16:20,725 INFO L225 Difference]: With dead ends: 11313 [2020-10-28 13:16:20,725 INFO L226 Difference]: Without dead ends: 7731 [2020-10-28 13:16:20,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:16:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7731 states. [2020-10-28 13:16:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7731 to 7066. [2020-10-28 13:16:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-10-28 13:16:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 9201 transitions. [2020-10-28 13:16:21,004 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 9201 transitions. Word has length 298 [2020-10-28 13:16:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:16:21,006 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 9201 transitions. [2020-10-28 13:16:21,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:16:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 9201 transitions. [2020-10-28 13:16:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-28 13:16:21,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:16:21,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:16:21,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:16:21,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:16:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:16:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash -782344045, now seen corresponding path program 1 times [2020-10-28 13:16:21,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:16:21,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437908433] [2020-10-28 13:16:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:16:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:21,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:21,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:21,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 13:16:21,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:16:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:22,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:22,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:16:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:16:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:22,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:16:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:22,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:22,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:16:22,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-28 13:16:22,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:22,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:16:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:16:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:16:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437908433] [2020-10-28 13:16:22,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:16:22,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:16:22,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873724327] [2020-10-28 13:16:22,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:16:22,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:16:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:16:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:16:22,702 INFO L87 Difference]: Start difference. First operand 7066 states and 9201 transitions. Second operand 5 states. [2020-10-28 13:16:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:16:33,562 INFO L93 Difference]: Finished difference Result 14137 states and 18549 transitions. [2020-10-28 13:16:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:16:33,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-28 13:16:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:16:33,606 INFO L225 Difference]: With dead ends: 14137 [2020-10-28 13:16:33,606 INFO L226 Difference]: Without dead ends: 7384 [2020-10-28 13:16:33,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:16:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2020-10-28 13:16:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 7374. [2020-10-28 13:16:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7374 states. [2020-10-28 13:16:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7374 states to 7374 states and 9320 transitions. [2020-10-28 13:16:33,894 INFO L78 Accepts]: Start accepts. Automaton has 7374 states and 9320 transitions. Word has length 335 [2020-10-28 13:16:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:16:33,895 INFO L481 AbstractCegarLoop]: Abstraction has 7374 states and 9320 transitions. [2020-10-28 13:16:33,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:16:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7374 states and 9320 transitions. [2020-10-28 13:16:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-28 13:16:33,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:16:33,906 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:16:33,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:16:33,906 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:16:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:16:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -482929250, now seen corresponding path program 1 times [2020-10-28 13:16:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:16:33,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593271273] [2020-10-28 13:16:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:16:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:34,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:35,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:39,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:39,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-28 13:16:39,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:16:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 13:16:39,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:39,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:16:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-10-28 13:16:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 13:16:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:39,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:16:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:39,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:39,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:16:39,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:16:39,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:39,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:16:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:39,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:16:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:16:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:16:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:39,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:39,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:39,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:16:39,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 13:16:39,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:39,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:16:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:16:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 13:16:39,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:39,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-10-28 13:16:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:39,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:16:39,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 13:16:39,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:16:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 13:16:39,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:16:39,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:16:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:16:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:16:39,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 13:16:39,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:16:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 13:16:40,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593271273] [2020-10-28 13:16:40,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:16:40,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:16:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787853026] [2020-10-28 13:16:40,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:16:40,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:16:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:16:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:16:40,166 INFO L87 Difference]: Start difference. First operand 7374 states and 9320 transitions. Second operand 7 states. [2020-10-28 13:16:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:16:58,658 INFO L93 Difference]: Finished difference Result 22470 states and 30987 transitions. [2020-10-28 13:16:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:16:58,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-28 13:16:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:16:58,730 INFO L225 Difference]: With dead ends: 22470 [2020-10-28 13:16:58,730 INFO L226 Difference]: Without dead ends: 13466 [2020-10-28 13:16:58,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:16:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13466 states. [2020-10-28 13:16:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13466 to 12996. [2020-10-28 13:16:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12996 states. [2020-10-28 13:16:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 15867 transitions. [2020-10-28 13:16:59,154 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 15867 transitions. Word has length 342 [2020-10-28 13:16:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:16:59,155 INFO L481 AbstractCegarLoop]: Abstraction has 12996 states and 15867 transitions. [2020-10-28 13:16:59,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:16:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 15867 transitions. [2020-10-28 13:16:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 13:16:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:16:59,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:16:59,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:16:59,170 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:16:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:16:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1537929048, now seen corresponding path program 1 times [2020-10-28 13:16:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:16:59,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707897999] [2020-10-28 13:16:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:16:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:16:59,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:16:59,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:02,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:03,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:03,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-28 13:17:03,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:17:03,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4576 [2020-10-28 13:17:03,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:03,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:17:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:17:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 13:17:03,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:04,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:17:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:04,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:04,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:04,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:17:04,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:04,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:17:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:04,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:17:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:04,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:04,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:04,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:17:04,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:17:04,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:04,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-28 13:17:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:04,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:04,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:17:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 13:17:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:17:04,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 106 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 13:17:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707897999] [2020-10-28 13:17:05,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:17:05,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:17:05,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592864945] [2020-10-28 13:17:05,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:17:05,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:17:05,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:17:05,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:17:05,514 INFO L87 Difference]: Start difference. First operand 12996 states and 15867 transitions. Second operand 7 states. [2020-10-28 13:17:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:17:13,680 INFO L93 Difference]: Finished difference Result 25729 states and 31570 transitions. [2020-10-28 13:17:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:17:13,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 352 [2020-10-28 13:17:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:17:13,744 INFO L225 Difference]: With dead ends: 25729 [2020-10-28 13:17:13,744 INFO L226 Difference]: Without dead ends: 13048 [2020-10-28 13:17:13,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:17:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2020-10-28 13:17:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 13020. [2020-10-28 13:17:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13020 states. [2020-10-28 13:17:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13020 states to 13020 states and 15927 transitions. [2020-10-28 13:17:14,120 INFO L78 Accepts]: Start accepts. Automaton has 13020 states and 15927 transitions. Word has length 352 [2020-10-28 13:17:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:17:14,121 INFO L481 AbstractCegarLoop]: Abstraction has 13020 states and 15927 transitions. [2020-10-28 13:17:14,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:17:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 13020 states and 15927 transitions. [2020-10-28 13:17:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-28 13:17:14,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:17:14,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:17:14,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:17:14,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:17:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:17:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1775601170, now seen corresponding path program 1 times [2020-10-28 13:17:14,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:17:14,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120880188] [2020-10-28 13:17:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:17:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:15,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:15,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:19,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:19,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 406 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:17:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 13:17:19,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:17:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:19,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:19,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:17:19,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:19,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:17:19,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:19,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:17:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:19,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:19,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:19,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:17:19,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:19,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 13:17:19,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:19,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:17:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:19,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 13:17:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:19,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:19,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 13:17:19,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:19,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 13:17:19,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-10-28 13:17:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:20,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:20,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:17:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 13:17:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:17:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 255 proven. 90 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 13:17:20,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120880188] [2020-10-28 13:17:20,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:17:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:17:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176795741] [2020-10-28 13:17:20,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:17:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:17:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:17:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:17:20,288 INFO L87 Difference]: Start difference. First operand 13020 states and 15927 transitions. Second operand 7 states. [2020-10-28 13:17:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:17:30,679 INFO L93 Difference]: Finished difference Result 26025 states and 32212 transitions. [2020-10-28 13:17:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:17:30,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 390 [2020-10-28 13:17:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:17:30,720 INFO L225 Difference]: With dead ends: 26025 [2020-10-28 13:17:30,720 INFO L226 Difference]: Without dead ends: 12077 [2020-10-28 13:17:30,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:17:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12077 states. [2020-10-28 13:17:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12077 to 11732. [2020-10-28 13:17:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11732 states. [2020-10-28 13:17:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 13471 transitions. [2020-10-28 13:17:31,044 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 13471 transitions. Word has length 390 [2020-10-28 13:17:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:17:31,044 INFO L481 AbstractCegarLoop]: Abstraction has 11732 states and 13471 transitions. [2020-10-28 13:17:31,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:17:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 13471 transitions. [2020-10-28 13:17:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-28 13:17:31,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:17:31,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:17:31,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:17:31,054 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:17:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:17:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 97339439, now seen corresponding path program 1 times [2020-10-28 13:17:31,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:17:31,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951046057] [2020-10-28 13:17:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:17:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 440 [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2171 [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:17:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 13:17:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:33,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:17:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:33,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:17:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:33,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:17:33,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:33,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:17:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:33,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:33,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:17:33,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:17:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:33,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:17:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:34,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:34,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 13:17:34,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:34,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 13:17:34,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:34,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:34,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:34,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:17:34,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 13:17:34,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:17:34,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951046057] [2020-10-28 13:17:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:17:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:17:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259168903] [2020-10-28 13:17:34,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:17:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:17:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:17:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:17:34,277 INFO L87 Difference]: Start difference. First operand 11732 states and 13471 transitions. Second operand 7 states. [2020-10-28 13:17:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:17:44,216 INFO L93 Difference]: Finished difference Result 28486 states and 33191 transitions. [2020-10-28 13:17:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:17:44,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 426 [2020-10-28 13:17:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:17:44,270 INFO L225 Difference]: With dead ends: 28486 [2020-10-28 13:17:44,271 INFO L226 Difference]: Without dead ends: 17071 [2020-10-28 13:17:44,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:17:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2020-10-28 13:17:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 17019. [2020-10-28 13:17:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17019 states. [2020-10-28 13:17:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17019 states to 17019 states and 19084 transitions. [2020-10-28 13:17:44,738 INFO L78 Accepts]: Start accepts. Automaton has 17019 states and 19084 transitions. Word has length 426 [2020-10-28 13:17:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:17:44,739 INFO L481 AbstractCegarLoop]: Abstraction has 17019 states and 19084 transitions. [2020-10-28 13:17:44,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:17:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 17019 states and 19084 transitions. [2020-10-28 13:17:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-28 13:17:44,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:17:44,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:17:44,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:17:44,752 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:17:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:17:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1057853076, now seen corresponding path program 1 times [2020-10-28 13:17:44,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:17:44,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539244937] [2020-10-28 13:17:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:17:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:45,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2244 [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:47,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:17:47,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-28 13:17:47,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:47,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:17:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:47,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:47,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:47,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:47,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:17:47,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:17:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:47,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:17:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:17:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:17:47,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:17:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:17:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:17:48,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 13:17:48,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:17:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 13:17:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:17:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:17:48,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539244937] [2020-10-28 13:17:48,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:17:48,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:17:48,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724513291] [2020-10-28 13:17:48,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:17:48,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:17:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:17:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:17:48,810 INFO L87 Difference]: Start difference. First operand 17019 states and 19084 transitions. Second operand 7 states. [2020-10-28 13:17:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:17:58,614 INFO L93 Difference]: Finished difference Result 35323 states and 39636 transitions. [2020-10-28 13:17:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:17:58,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 482 [2020-10-28 13:17:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:17:58,675 INFO L225 Difference]: With dead ends: 35323 [2020-10-28 13:17:58,676 INFO L226 Difference]: Without dead ends: 18928 [2020-10-28 13:17:58,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:17:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18928 states. [2020-10-28 13:17:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18928 to 18871. [2020-10-28 13:17:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18871 states. [2020-10-28 13:17:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18871 states to 18871 states and 20977 transitions. [2020-10-28 13:17:59,092 INFO L78 Accepts]: Start accepts. Automaton has 18871 states and 20977 transitions. Word has length 482 [2020-10-28 13:17:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:17:59,094 INFO L481 AbstractCegarLoop]: Abstraction has 18871 states and 20977 transitions. [2020-10-28 13:17:59,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:17:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18871 states and 20977 transitions. [2020-10-28 13:17:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-28 13:17:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:17:59,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:17:59,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:17:59,109 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:17:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:17:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1916900964, now seen corresponding path program 1 times [2020-10-28 13:17:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:17:59,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462913491] [2020-10-28 13:17:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:17:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:17:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:02,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:02,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 508 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:18:02,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 499 [2020-10-28 13:18:02,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:02,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:18:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:02,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:02,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:18:02,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:18:02,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:18:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:18:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:03,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:03,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:18:03,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-28 13:18:03,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:03,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:18:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:18:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-28 13:18:03,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:03,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:18:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:03,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 13:18:03,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 7 proven. 102 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 13:18:03,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462913491] [2020-10-28 13:18:03,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:18:03,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:18:03,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720932256] [2020-10-28 13:18:03,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:18:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:18:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:18:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:18:03,975 INFO L87 Difference]: Start difference. First operand 18871 states and 20977 transitions. Second operand 8 states. [2020-10-28 13:18:04,156 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:18:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:18:20,885 INFO L93 Difference]: Finished difference Result 39833 states and 45670 transitions. [2020-10-28 13:18:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 13:18:20,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 494 [2020-10-28 13:18:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:18:20,957 INFO L225 Difference]: With dead ends: 39833 [2020-10-28 13:18:20,958 INFO L226 Difference]: Without dead ends: 21571 [2020-10-28 13:18:20,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 13:18:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21571 states. [2020-10-28 13:18:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21571 to 20761. [2020-10-28 13:18:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20761 states. [2020-10-28 13:18:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20761 states to 20761 states and 23034 transitions. [2020-10-28 13:18:21,575 INFO L78 Accepts]: Start accepts. Automaton has 20761 states and 23034 transitions. Word has length 494 [2020-10-28 13:18:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:18:21,576 INFO L481 AbstractCegarLoop]: Abstraction has 20761 states and 23034 transitions. [2020-10-28 13:18:21,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:18:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20761 states and 23034 transitions. [2020-10-28 13:18:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-10-28 13:18:21,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:18:21,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:18:21,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 13:18:21,591 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:18:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:18:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash 213716045, now seen corresponding path program 1 times [2020-10-28 13:18:21,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:18:21,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598140482] [2020-10-28 13:18:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:18:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 588 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3089 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-28 13:18:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:18:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:25,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:18:25,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:18:25,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:18:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:18:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:25,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:25,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:18:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:18:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:18:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:25,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:18:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:25,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:25,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:18:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:18:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:18:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:25,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:18:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:18:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:18:25,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:18:25,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 13:18:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:18:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 327 proven. 54 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:18:25,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598140482] [2020-10-28 13:18:25,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:18:25,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:18:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295143161] [2020-10-28 13:18:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:18:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:18:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:18:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:18:25,973 INFO L87 Difference]: Start difference. First operand 20761 states and 23034 transitions. Second operand 6 states.