/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=DEEPEST --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/Problem17_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:47:40,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:47:40,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:47:40,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:47:40,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:47:40,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:47:40,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:47:40,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:47:40,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:47:40,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:47:40,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:47:40,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:47:40,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:47:40,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:47:40,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:47:40,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:47:40,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:47:40,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:47:40,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:47:40,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:47:40,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:47:40,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:47:40,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:47:40,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:47:40,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:47:40,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:47:40,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:47:40,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:47:40,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:47:40,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:47:40,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:47:40,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:47:40,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:47:40,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:47:40,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:47:40,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:47:40,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:47:40,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:47:40,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:47:40,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:47:40,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:47:40,454 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 [2020-10-27 18:47:40,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:47:40,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:47:40,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:47:40,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:47:40,484 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:47:40,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:47:40,484 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:47:40,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:47:40,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:47:40,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:47:40,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:47:40,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:47:40,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:47:40,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:47:40,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:47:40,486 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:47:40,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:47:40,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:47:40,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:47:40,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:47:40,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:47:40,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:47:40,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:47:40,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:47:40,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:47:40,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:47:40,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:47:40,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:47:40,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:47:40,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:47:40,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:47:40,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:47:40,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:47:40,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:47:40,934 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:47:40,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-27 18:47:41,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f176f4afe/6db1db57a3b14155a009df8b6a88f3df/FLAG60e751253 [2020-10-27 18:47:42,074 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:47:42,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label02.c [2020-10-27 18:47:42,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f176f4afe/6db1db57a3b14155a009df8b6a88f3df/FLAG60e751253 [2020-10-27 18:47:42,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f176f4afe/6db1db57a3b14155a009df8b6a88f3df [2020-10-27 18:47:42,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:47:42,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:47:42,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:42,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:47:42,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:47:42,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:42" (1/1) ... [2020-10-27 18:47:42,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e281a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:42, skipping insertion in model container [2020-10-27 18:47:42,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:42" (1/1) ... [2020-10-27 18:47:42,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:47:42,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:47:43,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:43,769 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:47:44,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:44,174 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:47:44,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44 WrapperNode [2020-10-27 18:47:44,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:44,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:47:44,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:47:44,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:47:44,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (1/1) ... [2020-10-27 18:47:44,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:47:44,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:47:44,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:47:44,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:47:44,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (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 [2020-10-27 18:47:44,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:47:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:47:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:47:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:47:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:47:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:47:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:47:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:47:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:47:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:47:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:47:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:47:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:47:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:47:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:47:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:47:54,840 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:47:54,840 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:47:54,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:47:54 BoogieIcfgContainer [2020-10-27 18:47:54,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:47:54,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:47:54,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:47:54,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:47:54,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:47:42" (1/3) ... [2020-10-27 18:47:54,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6766c050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:47:54, skipping insertion in model container [2020-10-27 18:47:54,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:44" (2/3) ... [2020-10-27 18:47:54,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6766c050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:47:54, skipping insertion in model container [2020-10-27 18:47:54,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:47:54" (3/3) ... [2020-10-27 18:47:54,857 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label02.c [2020-10-27 18:47:54,871 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:47:54,877 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:47:54,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:47:54,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:47:54,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:47:54,944 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:47:54,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:47:54,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:47:54,945 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:47:54,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:47:54,945 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:47:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:47:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 18:47:55,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:47:55,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:47:55,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:47:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:47:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash 301619986, now seen corresponding path program 1 times [2020-10-27 18:47:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:47:55,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376692554] [2020-10-27 18:47:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:47:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:55,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:47:55,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 18:47:55,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:47:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:47:55,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:47:55,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:47:56,237 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:47:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:47:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:56,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:56,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:47:56,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:56,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 18:47:56,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:47:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:47:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:47:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:47:56,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376692554] [2020-10-27 18:47:56,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:47:56,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:47:56,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887990545] [2020-10-27 18:47:56,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:47:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:47:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:47:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:47:56,428 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:48:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:14,978 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:48:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:14,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 18:48:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:15,019 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:48:15,019 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:48:15,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:48:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:48:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:48:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:48:15,200 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 60 [2020-10-27 18:48:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:15,201 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:48:15,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:48:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:48:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 18:48:15,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:15,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:15,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:48:15,223 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1413360078, now seen corresponding path program 1 times [2020-10-27 18:48:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:15,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113531456] [2020-10-27 18:48:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:15,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:15,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:17,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:17,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 18:48:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:48:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2325 [2020-10-27 18:48:17,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:48:17,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:48:17,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:17,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:17,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:17,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:17,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:17,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:48:17,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:17,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:17,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:48:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:18,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:18,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:48:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:18,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113531456] [2020-10-27 18:48:18,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:18,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:18,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235614895] [2020-10-27 18:48:18,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:18,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:18,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:18,175 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:48:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:34,476 INFO L93 Difference]: Finished difference Result 2901 states and 4503 transitions. [2020-10-27 18:48:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:34,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-10-27 18:48:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:34,491 INFO L225 Difference]: With dead ends: 2901 [2020-10-27 18:48:34,491 INFO L226 Difference]: Without dead ends: 1915 [2020-10-27 18:48:34,495 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 [2020-10-27 18:48:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-10-27 18:48:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1890. [2020-10-27 18:48:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-10-27 18:48:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2684 transitions. [2020-10-27 18:48:34,564 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2684 transitions. Word has length 131 [2020-10-27 18:48:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:34,565 INFO L481 AbstractCegarLoop]: Abstraction has 1890 states and 2684 transitions. [2020-10-27 18:48:34,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:48:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2684 transitions. [2020-10-27 18:48:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 18:48:34,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:34,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:34,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:48:34,568 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -712958465, now seen corresponding path program 1 times [2020-10-27 18:48:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:34,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067476244] [2020-10-27 18:48:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:36,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:48:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:48:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-27 18:48:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:36,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:36,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:36,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:36,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:36,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:48:36,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:36,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:36,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:36,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:48:36,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:36,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:36,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:36,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:36,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:48:36,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:48:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:37,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067476244] [2020-10-27 18:48:37,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:37,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:48:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207457222] [2020-10-27 18:48:37,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:48:37,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:48:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:48:37,113 INFO L87 Difference]: Start difference. First operand 1890 states and 2684 transitions. Second operand 8 states. [2020-10-27 18:48:37,815 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-27 18:48:38,743 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 18:48:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:57,237 INFO L93 Difference]: Finished difference Result 5218 states and 7528 transitions. [2020-10-27 18:48:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 18:48:57,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2020-10-27 18:48:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:57,262 INFO L225 Difference]: With dead ends: 5218 [2020-10-27 18:48:57,263 INFO L226 Difference]: Without dead ends: 3334 [2020-10-27 18:48:57,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-27 18:48:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2020-10-27 18:48:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3274. [2020-10-27 18:48:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3274 states. [2020-10-27 18:48:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 4404 transitions. [2020-10-27 18:48:57,447 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 4404 transitions. Word has length 134 [2020-10-27 18:48:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:57,450 INFO L481 AbstractCegarLoop]: Abstraction has 3274 states and 4404 transitions. [2020-10-27 18:48:57,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:48:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 4404 transitions. [2020-10-27 18:48:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 18:48:57,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:57,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:57,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:48:57,455 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:57,459 INFO L82 PathProgramCache]: Analyzing trace with hash 169888536, now seen corresponding path program 1 times [2020-10-27 18:48:57,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:57,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803655033] [2020-10-27 18:48:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:59,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:59,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 18:48:59,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:48:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-27 18:48:59,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-27 18:48:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:48:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:59,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:59,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:59,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:59,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:48:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:59,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:59,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:59,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:59,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:48:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 18:48:59,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 18:48:59,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:59,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803655033] [2020-10-27 18:48:59,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:59,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062161813] [2020-10-27 18:48:59,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:59,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:59,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:59,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:59,468 INFO L87 Difference]: Start difference. First operand 3274 states and 4404 transitions. Second operand 5 states. [2020-10-27 18:49:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:13,515 INFO L93 Difference]: Finished difference Result 7478 states and 10613 transitions. [2020-10-27 18:49:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:13,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-27 18:49:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:13,555 INFO L225 Difference]: With dead ends: 7478 [2020-10-27 18:49:13,555 INFO L226 Difference]: Without dead ends: 5081 [2020-10-27 18:49:13,563 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 [2020-10-27 18:49:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2020-10-27 18:49:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 5069. [2020-10-27 18:49:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5069 states. [2020-10-27 18:49:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 6664 transitions. [2020-10-27 18:49:13,738 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 6664 transitions. Word has length 150 [2020-10-27 18:49:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:13,739 INFO L481 AbstractCegarLoop]: Abstraction has 5069 states and 6664 transitions. [2020-10-27 18:49:13,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 6664 transitions. [2020-10-27 18:49:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 18:49:13,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:13,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:13,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:49:13,743 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash -124845442, now seen corresponding path program 1 times [2020-10-27 18:49:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936743680] [2020-10-27 18:49:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:13,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:14,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:14,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 18:49:14,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:14,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-27 18:49:14,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:49:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:49:14,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:15,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:15,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:15,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:15,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:15,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:15,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:49:15,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936743680] [2020-10-27 18:49:15,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:15,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057118800] [2020-10-27 18:49:15,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:15,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:15,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:15,353 INFO L87 Difference]: Start difference. First operand 5069 states and 6664 transitions. Second operand 5 states. [2020-10-27 18:49:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:30,929 INFO L93 Difference]: Finished difference Result 10597 states and 14634 transitions. [2020-10-27 18:49:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:30,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 18:49:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:30,977 INFO L225 Difference]: With dead ends: 10597 [2020-10-27 18:49:30,977 INFO L226 Difference]: Without dead ends: 7745 [2020-10-27 18:49:30,987 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 [2020-10-27 18:49:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7745 states. [2020-10-27 18:49:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7745 to 7729. [2020-10-27 18:49:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7729 states. [2020-10-27 18:49:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 9656 transitions. [2020-10-27 18:49:31,279 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 9656 transitions. Word has length 157 [2020-10-27 18:49:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:31,279 INFO L481 AbstractCegarLoop]: Abstraction has 7729 states and 9656 transitions. [2020-10-27 18:49:31,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 9656 transitions. [2020-10-27 18:49:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 18:49:31,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:31,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:31,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:49:31,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1904184557, now seen corresponding path program 1 times [2020-10-27 18:49:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:31,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917899304] [2020-10-27 18:49:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:31,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:31,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:32,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:32,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 18:49:32,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:49:32,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:32,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:32,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:32,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:49:32,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:32,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:32,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:33,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:33,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 18:49:33,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 18:49:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:33,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917899304] [2020-10-27 18:49:33,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:33,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126963274] [2020-10-27 18:49:33,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:33,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:33,247 INFO L87 Difference]: Start difference. First operand 7729 states and 9656 transitions. Second operand 5 states. [2020-10-27 18:49:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:50,042 INFO L93 Difference]: Finished difference Result 18549 states and 23809 transitions. [2020-10-27 18:49:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:50,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-10-27 18:49:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:50,099 INFO L225 Difference]: With dead ends: 18549 [2020-10-27 18:49:50,099 INFO L226 Difference]: Without dead ends: 11259 [2020-10-27 18:49:50,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11259 states. [2020-10-27 18:49:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11259 to 11257. [2020-10-27 18:49:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11257 states. [2020-10-27 18:49:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11257 states to 11257 states and 14069 transitions. [2020-10-27 18:49:50,480 INFO L78 Accepts]: Start accepts. Automaton has 11257 states and 14069 transitions. Word has length 175 [2020-10-27 18:49:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:50,480 INFO L481 AbstractCegarLoop]: Abstraction has 11257 states and 14069 transitions. [2020-10-27 18:49:50,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 11257 states and 14069 transitions. [2020-10-27 18:49:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 18:49:50,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:50,486 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, 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] [2020-10-27 18:49:50,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:49:50,487 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:50,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1980494429, now seen corresponding path program 1 times [2020-10-27 18:49:50,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:50,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425276497] [2020-10-27 18:49:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:50,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:50,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:51,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:55,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:55,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 18:49:55,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:49:55,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 18:49:55,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 18:49:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:49:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:55,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:55,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:55,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:55,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:55,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:55,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:56,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:56,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:56,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:49:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:56,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:56,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:49:56,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:56,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-27 18:49:56,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:56,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:49:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:49:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 18:49:56,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425276497] [2020-10-27 18:49:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516009310] [2020-10-27 18:49:56,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:56,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:56,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:56,394 INFO L87 Difference]: Start difference. First operand 11257 states and 14069 transitions. Second operand 5 states. [2020-10-27 18:49:57,963 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 18:50:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:09,014 INFO L93 Difference]: Finished difference Result 19453 states and 24533 transitions. [2020-10-27 18:50:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:09,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2020-10-27 18:50:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:09,059 INFO L225 Difference]: With dead ends: 19453 [2020-10-27 18:50:09,059 INFO L226 Difference]: Without dead ends: 11259 [2020-10-27 18:50:09,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11259 states. [2020-10-27 18:50:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11259 to 11257. [2020-10-27 18:50:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11257 states. [2020-10-27 18:50:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11257 states to 11257 states and 14057 transitions. [2020-10-27 18:50:09,429 INFO L78 Accepts]: Start accepts. Automaton has 11257 states and 14057 transitions. Word has length 209 [2020-10-27 18:50:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:09,430 INFO L481 AbstractCegarLoop]: Abstraction has 11257 states and 14057 transitions. [2020-10-27 18:50:09,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11257 states and 14057 transitions. [2020-10-27 18:50:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 18:50:09,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:09,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:09,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:50:09,439 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1509905696, now seen corresponding path program 1 times [2020-10-27 18:50:09,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:09,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301852050] [2020-10-27 18:50:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:09,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:09,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:11,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:11,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2010 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:50:11,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:11,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:11,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:11,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:50:11,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:11,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:12,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:12,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 18:50:12,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 18:50:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:50:12,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301852050] [2020-10-27 18:50:12,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:12,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437124650] [2020-10-27 18:50:12,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:12,209 INFO L87 Difference]: Start difference. First operand 11257 states and 14057 transitions. Second operand 5 states. [2020-10-27 18:50:12,370 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:50:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:29,618 INFO L93 Difference]: Finished difference Result 26489 states and 34440 transitions. [2020-10-27 18:50:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:29,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2020-10-27 18:50:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:29,708 INFO L225 Difference]: With dead ends: 26489 [2020-10-27 18:50:29,708 INFO L226 Difference]: Without dead ends: 16108 [2020-10-27 18:50:29,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16108 states. [2020-10-27 18:50:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16108 to 16098. [2020-10-27 18:50:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16098 states. [2020-10-27 18:50:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16098 states to 16098 states and 20726 transitions. [2020-10-27 18:50:30,310 INFO L78 Accepts]: Start accepts. Automaton has 16098 states and 20726 transitions. Word has length 215 [2020-10-27 18:50:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:30,311 INFO L481 AbstractCegarLoop]: Abstraction has 16098 states and 20726 transitions. [2020-10-27 18:50:30,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 16098 states and 20726 transitions. [2020-10-27 18:50:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 18:50:30,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:30,318 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, 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] [2020-10-27 18:50:30,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:50:30,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 169603277, now seen corresponding path program 1 times [2020-10-27 18:50:30,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:30,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35872167] [2020-10-27 18:50:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:30,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:30,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:33,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:35,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:35,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 18:50:35,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 18:50:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:35,573 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:50:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:35,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:35,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:35,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:35,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:35,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:50:35,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:35,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:50:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:35,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:35,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:35,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:50:35,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 18:50:35,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:50:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 18:50:35,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:50:36,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35872167] [2020-10-27 18:50:36,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:36,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:50:36,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91668445] [2020-10-27 18:50:36,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:50:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:50:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:50:36,100 INFO L87 Difference]: Start difference. First operand 16098 states and 20726 transitions. Second operand 7 states. [2020-10-27 18:50:36,270 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:50:41,079 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:50:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:56,940 INFO L93 Difference]: Finished difference Result 27856 states and 36958 transitions. [2020-10-27 18:50:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:50:56,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-10-27 18:50:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:56,976 INFO L225 Difference]: With dead ends: 27856 [2020-10-27 18:50:56,976 INFO L226 Difference]: Without dead ends: 9537 [2020-10-27 18:50:57,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:50:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2020-10-27 18:50:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 9073. [2020-10-27 18:50:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9073 states. [2020-10-27 18:50:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9073 states to 9073 states and 11276 transitions. [2020-10-27 18:50:57,250 INFO L78 Accepts]: Start accepts. Automaton has 9073 states and 11276 transitions. Word has length 220 [2020-10-27 18:50:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:57,251 INFO L481 AbstractCegarLoop]: Abstraction has 9073 states and 11276 transitions. [2020-10-27 18:50:57,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:50:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9073 states and 11276 transitions. [2020-10-27 18:50:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 18:50:57,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:57,256 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:50:57,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:50:57,257 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -650886624, now seen corresponding path program 1 times [2020-10-27 18:50:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:57,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026006096] [2020-10-27 18:50:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:57,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:02,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:02,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 18:51:02,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 18:51:02,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:02,579 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:02,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:02,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:02,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:02,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:02,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:02,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:02,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:02,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:51:02,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:02,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 18:51:02,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:02,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:02,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:02,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:02,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:02,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:51:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:02,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:02,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:51:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:51:02,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026006096] [2020-10-27 18:51:02,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:02,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:02,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375695048] [2020-10-27 18:51:02,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:51:02,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:51:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:51:02,883 INFO L87 Difference]: Start difference. First operand 9073 states and 11276 transitions. Second operand 5 states. [2020-10-27 18:51:03,773 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:51:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:20,481 INFO L93 Difference]: Finished difference Result 17711 states and 22116 transitions. [2020-10-27 18:51:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:51:20,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2020-10-27 18:51:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:20,513 INFO L225 Difference]: With dead ends: 17711 [2020-10-27 18:51:20,513 INFO L226 Difference]: Without dead ends: 9079 [2020-10-27 18:51:20,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9079 states. [2020-10-27 18:51:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9079 to 9073. [2020-10-27 18:51:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9073 states. [2020-10-27 18:51:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9073 states to 9073 states and 11265 transitions. [2020-10-27 18:51:20,741 INFO L78 Accepts]: Start accepts. Automaton has 9073 states and 11265 transitions. Word has length 233 [2020-10-27 18:51:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:20,742 INFO L481 AbstractCegarLoop]: Abstraction has 9073 states and 11265 transitions. [2020-10-27 18:51:20,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:51:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9073 states and 11265 transitions. [2020-10-27 18:51:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 18:51:20,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:20,751 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:51:20,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:51:20,751 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:20,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1212345070, now seen corresponding path program 1 times [2020-10-27 18:51:20,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:20,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463263645] [2020-10-27 18:51:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:20,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:21,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:23,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:23,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 18:51:23,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:51:23,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2972 [2020-10-27 18:51:23,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-27 18:51:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 18:51:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 18:51:24,115 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:24,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:24,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:51:24,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:24,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:24,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:24,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:24,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:51:24,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 18:51:24,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:51:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 18:51:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 18:51:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 18:51:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:51:24,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463263645] [2020-10-27 18:51:24,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:24,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745516185] [2020-10-27 18:51:24,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:51:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:51:24,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:51:24,580 INFO L87 Difference]: Start difference. First operand 9073 states and 11265 transitions. Second operand 5 states. [2020-10-27 18:51:28,914 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 82