/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=SHALLOWEST --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/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:52:11,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:52:11,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:52:11,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:52:11,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:52:11,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:52:11,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:52:11,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:52:11,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:52:11,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:52:11,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:52:11,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:52:11,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:52:11,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:52:11,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:52:11,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:52:11,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:52:11,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:52:11,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:52:11,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:52:11,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:52:11,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:52:11,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:52:11,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:52:11,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:52:11,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:52:11,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:52:11,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:52:11,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:52:11,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:52:11,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:52:11,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:52:11,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:52:11,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:52:11,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:52:11,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:52:11,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:52:11,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:52:11,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:52:11,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:52:11,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:52:11,351 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 04:52:11,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:52:11,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:52:11,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:52:11,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:52:11,412 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:52:11,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:52:11,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:52:11,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:52:11,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:52:11,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:52:11,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:52:11,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:52:11,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:52:11,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:52:11,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:52:11,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:52:11,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:52:11,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:52:11,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:52:11,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:52:11,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:52:11,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:52:11,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:52:11,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:52:11,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:52:11,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:52:11,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:52:11,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:52:11,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:52:11,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:52:11,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:52:11,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:52:11,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:52:11,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:52:11,894 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:52:11,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:52:11,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0f1a797/9c2ce21df54e46b8a7428bb2752ff759/FLAGd46fd368a [2020-10-27 04:52:12,590 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:52:12,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:52:12,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0f1a797/9c2ce21df54e46b8a7428bb2752ff759/FLAGd46fd368a [2020-10-27 04:52:12,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0f1a797/9c2ce21df54e46b8a7428bb2752ff759 [2020-10-27 04:52:12,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:52:12,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:52:12,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:52:12,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:52:12,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:52:12,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:52:12" (1/1) ... [2020-10-27 04:52:12,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284a59d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:12, skipping insertion in model container [2020-10-27 04:52:12,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:52:12" (1/1) ... [2020-10-27 04:52:12,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:52:12,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:52:13,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:52:13,272 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:52:13,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:52:13,387 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:52:13,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13 WrapperNode [2020-10-27 04:52:13,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:52:13,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:52:13,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:52:13,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:52:13,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (1/1) ... [2020-10-27 04:52:13,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:52:13,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:52:13,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:52:13,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:52:13,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (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 04:52:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:52:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:52:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:52:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 04:52:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:52:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:52:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:52:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:52:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 04:52:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 04:52:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:52:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:52:14,473 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:52:14,474 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:52:14,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:52:14 BoogieIcfgContainer [2020-10-27 04:52:14,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:52:14,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:52:14,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:52:14,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:52:14,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:52:12" (1/3) ... [2020-10-27 04:52:14,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae3437b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:52:14, skipping insertion in model container [2020-10-27 04:52:14,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:52:13" (2/3) ... [2020-10-27 04:52:14,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae3437b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:52:14, skipping insertion in model container [2020-10-27 04:52:14,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:52:14" (3/3) ... [2020-10-27 04:52:14,486 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 04:52:14,498 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:52:14,504 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:52:14,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:52:14,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:52:14,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:52:14,546 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:52:14,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:52:14,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:52:14,547 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:52:14,547 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:52:14,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:52:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-10-27 04:52:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 04:52:14,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:14,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:14,579 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1717592954, now seen corresponding path program 1 times [2020-10-27 04:52:14,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:14,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462266334] [2020-10-27 04:52:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:15,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:17,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:17,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 04:52:17,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:17,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2900 [2020-10-27 04:52:17,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:52:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 04:52:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 04:52:17,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:52:18,315 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:18,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:18,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:18,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:18,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:18,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 04:52:18,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:18,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:18,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:52:18,400 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 04:52:18,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462266334] [2020-10-27 04:52:18,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:18,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:52:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373354807] [2020-10-27 04:52:18,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:52:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:18,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:52:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:52:18,439 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 4 states. [2020-10-27 04:52:18,854 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:52:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:19,950 INFO L93 Difference]: Finished difference Result 301 states and 506 transitions. [2020-10-27 04:52:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:52:19,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-27 04:52:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:19,965 INFO L225 Difference]: With dead ends: 301 [2020-10-27 04:52:19,966 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 04:52:19,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 04:52:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2020-10-27 04:52:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 04:52:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 318 transitions. [2020-10-27 04:52:20,037 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 318 transitions. Word has length 62 [2020-10-27 04:52:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:20,038 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 318 transitions. [2020-10-27 04:52:20,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:52:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 318 transitions. [2020-10-27 04:52:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 04:52:20,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:20,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:20,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:52:20,042 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1229530538, now seen corresponding path program 1 times [2020-10-27 04:52:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:20,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597801937] [2020-10-27 04:52:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:20,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:25,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:25,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 04:52:25,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 04:52:25,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 04:52:25,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:25,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 04:52:25,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:52:25,561 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:25,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:25,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:25,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:25,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 04:52:25,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:25,620 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 04:52:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597801937] [2020-10-27 04:52:25,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:25,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36222673] [2020-10-27 04:52:25,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:25,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:25,627 INFO L87 Difference]: Start difference. First operand 204 states and 318 transitions. Second operand 5 states. [2020-10-27 04:52:26,748 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:26,850 INFO L93 Difference]: Finished difference Result 560 states and 872 transitions. [2020-10-27 04:52:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:26,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 04:52:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:26,856 INFO L225 Difference]: With dead ends: 560 [2020-10-27 04:52:26,856 INFO L226 Difference]: Without dead ends: 379 [2020-10-27 04:52:26,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-27 04:52:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 376. [2020-10-27 04:52:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-27 04:52:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 583 transitions. [2020-10-27 04:52:26,929 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 583 transitions. Word has length 64 [2020-10-27 04:52:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:26,929 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 583 transitions. [2020-10-27 04:52:26,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 583 transitions. [2020-10-27 04:52:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 04:52:26,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:26,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:26,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:52:26,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 815670445, now seen corresponding path program 1 times [2020-10-27 04:52:26,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:26,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066133279] [2020-10-27 04:52:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:27,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:30,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:30,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 04:52:30,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:52:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4000 [2020-10-27 04:52:30,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:30,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:30,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 04:52:30,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:31,323 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:31,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:31,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:31,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:31,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 04:52:31,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:31,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:52:31,410 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 04:52:31,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066133279] [2020-10-27 04:52:31,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:31,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:31,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708940184] [2020-10-27 04:52:31,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:31,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:31,413 INFO L87 Difference]: Start difference. First operand 376 states and 583 transitions. Second operand 5 states. [2020-10-27 04:52:32,484 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:32,588 INFO L93 Difference]: Finished difference Result 1086 states and 1686 transitions. [2020-10-27 04:52:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:32,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 04:52:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:32,593 INFO L225 Difference]: With dead ends: 1086 [2020-10-27 04:52:32,594 INFO L226 Difference]: Without dead ends: 721 [2020-10-27 04:52:32,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-10-27 04:52:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2020-10-27 04:52:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-27 04:52:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1105 transitions. [2020-10-27 04:52:32,652 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1105 transitions. Word has length 64 [2020-10-27 04:52:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:32,656 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1105 transitions. [2020-10-27 04:52:32,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1105 transitions. [2020-10-27 04:52:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 04:52:32,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:32,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:32,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:52:32,664 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -174677902, now seen corresponding path program 1 times [2020-10-27 04:52:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:32,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269882005] [2020-10-27 04:52:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:33,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:37,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:37,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 04:52:37,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:52:37,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 04:52:37,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:52:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:52:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 04:52:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:38,149 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:38,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:38,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:52:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:52:38,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:38,219 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 04:52:38,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269882005] [2020-10-27 04:52:38,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:38,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:52:38,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212985619] [2020-10-27 04:52:38,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:52:38,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:52:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:52:38,222 INFO L87 Difference]: Start difference. First operand 718 states and 1105 transitions. Second operand 8 states. [2020-10-27 04:52:38,615 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:39,798 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 04:52:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:40,111 INFO L93 Difference]: Finished difference Result 1858 states and 2986 transitions. [2020-10-27 04:52:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:52:40,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 04:52:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:40,120 INFO L225 Difference]: With dead ends: 1858 [2020-10-27 04:52:40,121 INFO L226 Difference]: Without dead ends: 1321 [2020-10-27 04:52:40,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:52:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-10-27 04:52:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 740. [2020-10-27 04:52:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-27 04:52:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1129 transitions. [2020-10-27 04:52:40,200 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1129 transitions. Word has length 65 [2020-10-27 04:52:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:40,200 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 1129 transitions. [2020-10-27 04:52:40,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:52:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1129 transitions. [2020-10-27 04:52:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 04:52:40,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:40,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:40,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:52:40,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash 946768502, now seen corresponding path program 1 times [2020-10-27 04:52:40,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:40,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535537610] [2020-10-27 04:52:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:40,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:40,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:41,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:45,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:45,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 04:52:45,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 04:52:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:45,589 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:45,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:52:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:45,633 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 04:52:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535537610] [2020-10-27 04:52:45,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:45,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134445283] [2020-10-27 04:52:45,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:45,636 INFO L87 Difference]: Start difference. First operand 740 states and 1129 transitions. Second operand 5 states. [2020-10-27 04:52:46,688 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:46,845 INFO L93 Difference]: Finished difference Result 2104 states and 3207 transitions. [2020-10-27 04:52:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:46,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 04:52:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:46,855 INFO L225 Difference]: With dead ends: 2104 [2020-10-27 04:52:46,856 INFO L226 Difference]: Without dead ends: 1407 [2020-10-27 04:52:46,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-10-27 04:52:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1404. [2020-10-27 04:52:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-27 04:52:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2121 transitions. [2020-10-27 04:52:47,009 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2121 transitions. Word has length 65 [2020-10-27 04:52:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:47,010 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 2121 transitions. [2020-10-27 04:52:47,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2121 transitions. [2020-10-27 04:52:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 04:52:47,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:47,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:47,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:52:47,015 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 973000797, now seen corresponding path program 1 times [2020-10-27 04:52:47,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:47,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635205080] [2020-10-27 04:52:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:47,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:49,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:49,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 04:52:49,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:52:49,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-27 04:52:49,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:49,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:49,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:49,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 04:52:49,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:50,296 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:50,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:50,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:50,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 04:52:50,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:52:50,354 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 04:52:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635205080] [2020-10-27 04:52:50,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:50,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:50,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997682435] [2020-10-27 04:52:50,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:50,359 INFO L87 Difference]: Start difference. First operand 1404 states and 2121 transitions. Second operand 5 states. [2020-10-27 04:52:51,661 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:52:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:51,812 INFO L93 Difference]: Finished difference Result 4044 states and 6135 transitions. [2020-10-27 04:52:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:51,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 04:52:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:51,827 INFO L225 Difference]: With dead ends: 4044 [2020-10-27 04:52:51,827 INFO L226 Difference]: Without dead ends: 2716 [2020-10-27 04:52:51,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2020-10-27 04:52:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2713. [2020-10-27 04:52:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2713 states. [2020-10-27 04:52:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 4075 transitions. [2020-10-27 04:52:52,104 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 4075 transitions. Word has length 65 [2020-10-27 04:52:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:52,105 INFO L481 AbstractCegarLoop]: Abstraction has 2713 states and 4075 transitions. [2020-10-27 04:52:52,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 4075 transitions. [2020-10-27 04:52:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:52:52,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:52,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:52,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:52:52,112 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 123600718, now seen corresponding path program 1 times [2020-10-27 04:52:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710861228] [2020-10-27 04:52:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:52,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:52,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:53,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:55,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:55,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:52:55,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3722 [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:52:55,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:56,223 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:56,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:56,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:56,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:56,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:56,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:56,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 04:52:56,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:56,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:56,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:56,287 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 04:52:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710861228] [2020-10-27 04:52:56,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:56,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33946025] [2020-10-27 04:52:56,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:56,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:56,292 INFO L87 Difference]: Start difference. First operand 2713 states and 4075 transitions. Second operand 5 states. [2020-10-27 04:52:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:57,321 INFO L93 Difference]: Finished difference Result 4717 states and 7077 transitions. [2020-10-27 04:52:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:52:57,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 04:52:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:57,333 INFO L225 Difference]: With dead ends: 4717 [2020-10-27 04:52:57,333 INFO L226 Difference]: Without dead ends: 2077 [2020-10-27 04:52:57,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:52:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2020-10-27 04:52:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2077. [2020-10-27 04:52:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-27 04:52:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3094 transitions. [2020-10-27 04:52:57,540 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3094 transitions. Word has length 66 [2020-10-27 04:52:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:57,541 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3094 transitions. [2020-10-27 04:52:57,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3094 transitions. [2020-10-27 04:52:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:52:57,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:57,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:57,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 04:52:57,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:57,547 INFO L82 PathProgramCache]: Analyzing trace with hash 283814885, now seen corresponding path program 1 times [2020-10-27 04:52:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673058997] [2020-10-27 04:52:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:02,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:02,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:53:02,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 04:53:02,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 04:53:02,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:53:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 04:53:02,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 04:53:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:02,903 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:02,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:02,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:02,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:02,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:02,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:53:02,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:02,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:02,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:02,939 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 04:53:02,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673058997] [2020-10-27 04:53:02,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:02,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:53:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962621542] [2020-10-27 04:53:02,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:53:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:53:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:53:02,948 INFO L87 Difference]: Start difference. First operand 2077 states and 3094 transitions. Second operand 4 states. [2020-10-27 04:53:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:04,379 INFO L93 Difference]: Finished difference Result 6076 states and 9064 transitions. [2020-10-27 04:53:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 04:53:04,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 04:53:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:04,402 INFO L225 Difference]: With dead ends: 6076 [2020-10-27 04:53:04,403 INFO L226 Difference]: Without dead ends: 4092 [2020-10-27 04:53:04,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:53:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2020-10-27 04:53:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2083. [2020-10-27 04:53:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-10-27 04:53:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3100 transitions. [2020-10-27 04:53:04,623 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3100 transitions. Word has length 66 [2020-10-27 04:53:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:04,624 INFO L481 AbstractCegarLoop]: Abstraction has 2083 states and 3100 transitions. [2020-10-27 04:53:04,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:53:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3100 transitions. [2020-10-27 04:53:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:53:04,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:04,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:04,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 04:53:04,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -458007629, now seen corresponding path program 1 times [2020-10-27 04:53:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:04,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784128091] [2020-10-27 04:53:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:04,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:05,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:06,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:06,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:53:06,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:53:06,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-27 04:53:06,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 04:53:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 04:53:06,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:06,996 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:07,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:07,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:07,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:07,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:07,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:53:07,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:07,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:07,038 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 04:53:07,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784128091] [2020-10-27 04:53:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:07,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975610211] [2020-10-27 04:53:07,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:07,040 INFO L87 Difference]: Start difference. First operand 2083 states and 3100 transitions. Second operand 5 states. [2020-10-27 04:53:07,427 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:53:08,651 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:53:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:08,980 INFO L93 Difference]: Finished difference Result 3680 states and 5714 transitions. [2020-10-27 04:53:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 04:53:08,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 04:53:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:09,005 INFO L225 Difference]: With dead ends: 3680 [2020-10-27 04:53:09,005 INFO L226 Difference]: Without dead ends: 2865 [2020-10-27 04:53:09,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:53:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-10-27 04:53:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2859. [2020-10-27 04:53:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2859 states. [2020-10-27 04:53:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 4296 transitions. [2020-10-27 04:53:09,264 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 4296 transitions. Word has length 66 [2020-10-27 04:53:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:09,264 INFO L481 AbstractCegarLoop]: Abstraction has 2859 states and 4296 transitions. [2020-10-27 04:53:09,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 4296 transitions. [2020-10-27 04:53:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:53:09,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:09,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:09,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 04:53:09,270 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1428485038, now seen corresponding path program 1 times [2020-10-27 04:53:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290889183] [2020-10-27 04:53:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:09,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:09,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:09,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:09,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:11,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:11,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1833 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 04:53:11,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:11,472 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:11,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:11,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:11,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:11,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:11,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:11,506 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 04:53:11,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290889183] [2020-10-27 04:53:11,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:11,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:53:11,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125544812] [2020-10-27 04:53:11,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:53:11,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:11,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:53:11,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:53:11,509 INFO L87 Difference]: Start difference. First operand 2859 states and 4296 transitions. Second operand 4 states. [2020-10-27 04:53:11,866 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:53:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:12,827 INFO L93 Difference]: Finished difference Result 7233 states and 11176 transitions. [2020-10-27 04:53:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:53:12,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 04:53:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:12,855 INFO L225 Difference]: With dead ends: 7233 [2020-10-27 04:53:12,855 INFO L226 Difference]: Without dead ends: 4926 [2020-10-27 04:53:12,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2020-10-27 04:53:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4923. [2020-10-27 04:53:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4923 states. [2020-10-27 04:53:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 7488 transitions. [2020-10-27 04:53:13,357 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 7488 transitions. Word has length 67 [2020-10-27 04:53:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:13,357 INFO L481 AbstractCegarLoop]: Abstraction has 4923 states and 7488 transitions. [2020-10-27 04:53:13,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:53:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 7488 transitions. [2020-10-27 04:53:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 04:53:13,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:13,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:13,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 04:53:13,364 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1901379168, now seen corresponding path program 1 times [2020-10-27 04:53:13,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:13,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378172106] [2020-10-27 04:53:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:13,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:13,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:16,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:16,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 04:53:16,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:53:16,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2808 [2020-10-27 04:53:16,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:53:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 04:53:16,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:16,584 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:16,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:16,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:16,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:16,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:16,627 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 04:53:16,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378172106] [2020-10-27 04:53:16,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:16,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:16,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449939226] [2020-10-27 04:53:16,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:16,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:16,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:16,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:16,629 INFO L87 Difference]: Start difference. First operand 4923 states and 7488 transitions. Second operand 5 states. [2020-10-27 04:53:18,015 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:53:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:18,596 INFO L93 Difference]: Finished difference Result 13793 states and 21156 transitions. [2020-10-27 04:53:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:53:18,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 04:53:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:18,639 INFO L225 Difference]: With dead ends: 13793 [2020-10-27 04:53:18,639 INFO L226 Difference]: Without dead ends: 9422 [2020-10-27 04:53:18,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:53:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9422 states. [2020-10-27 04:53:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9422 to 9419. [2020-10-27 04:53:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9419 states. [2020-10-27 04:53:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9419 states to 9419 states and 14168 transitions. [2020-10-27 04:53:19,758 INFO L78 Accepts]: Start accepts. Automaton has 9419 states and 14168 transitions. Word has length 70 [2020-10-27 04:53:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:19,758 INFO L481 AbstractCegarLoop]: Abstraction has 9419 states and 14168 transitions. [2020-10-27 04:53:19,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9419 states and 14168 transitions. [2020-10-27 04:53:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 04:53:19,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:19,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:19,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 04:53:19,770 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:19,771 INFO L82 PathProgramCache]: Analyzing trace with hash 211983741, now seen corresponding path program 1 times [2020-10-27 04:53:19,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713633569] [2020-10-27 04:53:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:19,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:20,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:24,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:24,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 04:53:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:25,159 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:25,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:25,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:25,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:25,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:53:25,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:25,192 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 04:53:25,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713633569] [2020-10-27 04:53:25,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:25,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644212993] [2020-10-27 04:53:25,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:25,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:25,195 INFO L87 Difference]: Start difference. First operand 9419 states and 14168 transitions. Second operand 5 states. [2020-10-27 04:53:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:26,284 INFO L93 Difference]: Finished difference Result 15468 states and 23200 transitions. [2020-10-27 04:53:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:53:26,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 04:53:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:26,299 INFO L225 Difference]: With dead ends: 15468 [2020-10-27 04:53:26,300 INFO L226 Difference]: Without dead ends: 6115 [2020-10-27 04:53:26,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:53:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2020-10-27 04:53:27,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 6114. [2020-10-27 04:53:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6114 states. [2020-10-27 04:53:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9115 transitions. [2020-10-27 04:53:27,248 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9115 transitions. Word has length 70 [2020-10-27 04:53:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:27,248 INFO L481 AbstractCegarLoop]: Abstraction has 6114 states and 9115 transitions. [2020-10-27 04:53:27,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9115 transitions. [2020-10-27 04:53:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 04:53:27,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:27,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:27,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 04:53:27,254 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash 481649286, now seen corresponding path program 1 times [2020-10-27 04:53:27,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:27,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074039783] [2020-10-27 04:53:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:32,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:32,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 04:53:32,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:53:32,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 04:53:32,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:53:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:53:32,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 04:53:32,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:32,714 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:32,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:32,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:32,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:53:32,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:32,771 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 04:53:32,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074039783] [2020-10-27 04:53:32,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:32,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:53:32,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193045015] [2020-10-27 04:53:32,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:53:32,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:53:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:53:32,773 INFO L87 Difference]: Start difference. First operand 6114 states and 9115 transitions. Second operand 8 states. [2020-10-27 04:53:33,180 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:53:34,416 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 04:53:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:35,446 INFO L93 Difference]: Finished difference Result 15687 states and 23767 transitions. [2020-10-27 04:53:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:53:35,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 04:53:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:35,472 INFO L225 Difference]: With dead ends: 15687 [2020-10-27 04:53:35,472 INFO L226 Difference]: Without dead ends: 10236 [2020-10-27 04:53:35,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:53:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10236 states. [2020-10-27 04:53:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10236 to 6379. [2020-10-27 04:53:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6379 states. [2020-10-27 04:53:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6379 states to 6379 states and 9339 transitions. [2020-10-27 04:53:36,260 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 9339 transitions. Word has length 70 [2020-10-27 04:53:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:36,261 INFO L481 AbstractCegarLoop]: Abstraction has 6379 states and 9339 transitions. [2020-10-27 04:53:36,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:53:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 9339 transitions. [2020-10-27 04:53:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 04:53:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:36,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:36,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 04:53:36,266 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2036667839, now seen corresponding path program 1 times [2020-10-27 04:53:36,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:36,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916491179] [2020-10-27 04:53:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:36,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:36,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:40,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4541 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 04:53:40,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:41,194 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:41,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:41,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:41,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:41,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:41,222 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 04:53:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916491179] [2020-10-27 04:53:41,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:41,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:41,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666980108] [2020-10-27 04:53:41,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:41,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:41,224 INFO L87 Difference]: Start difference. First operand 6379 states and 9339 transitions. Second operand 5 states. [2020-10-27 04:53:42,522 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:53:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:43,250 INFO L93 Difference]: Finished difference Result 16519 states and 24165 transitions. [2020-10-27 04:53:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:53:43,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-27 04:53:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:43,278 INFO L225 Difference]: With dead ends: 16519 [2020-10-27 04:53:43,279 INFO L226 Difference]: Without dead ends: 10318 [2020-10-27 04:53:43,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:53:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2020-10-27 04:53:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 10315. [2020-10-27 04:53:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10315 states. [2020-10-27 04:53:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 14908 transitions. [2020-10-27 04:53:44,520 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 14908 transitions. Word has length 70 [2020-10-27 04:53:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:44,520 INFO L481 AbstractCegarLoop]: Abstraction has 10315 states and 14908 transitions. [2020-10-27 04:53:44,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 14908 transitions. [2020-10-27 04:53:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 04:53:44,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:44,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:44,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 04:53:44,593 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2105448007, now seen corresponding path program 1 times [2020-10-27 04:53:44,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:44,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223905280] [2020-10-27 04:53:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:44,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:44,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:45,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 04:53:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:46,781 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:46,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:46,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:53:46,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:46,806 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 04:53:46,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223905280] [2020-10-27 04:53:46,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:46,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:53:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941756157] [2020-10-27 04:53:46,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:53:46,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:53:46,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:53:46,808 INFO L87 Difference]: Start difference. First operand 10315 states and 14908 transitions. Second operand 4 states. [2020-10-27 04:53:47,202 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:53:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:49,306 INFO L93 Difference]: Finished difference Result 27091 states and 39792 transitions. [2020-10-27 04:53:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:53:49,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 04:53:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:49,341 INFO L225 Difference]: With dead ends: 27091 [2020-10-27 04:53:49,341 INFO L226 Difference]: Without dead ends: 18238 [2020-10-27 04:53:49,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18238 states. [2020-10-27 04:53:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18238 to 18235. [2020-10-27 04:53:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18235 states. [2020-10-27 04:53:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18235 states to 18235 states and 26433 transitions. [2020-10-27 04:53:51,343 INFO L78 Accepts]: Start accepts. Automaton has 18235 states and 26433 transitions. Word has length 71 [2020-10-27 04:53:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:51,343 INFO L481 AbstractCegarLoop]: Abstraction has 18235 states and 26433 transitions. [2020-10-27 04:53:51,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:53:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 18235 states and 26433 transitions. [2020-10-27 04:53:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 04:53:51,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:51,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:51,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 04:53:51,351 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1393137143, now seen corresponding path program 1 times [2020-10-27 04:53:51,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:51,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083569299] [2020-10-27 04:53:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:51,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:51,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:51,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:51,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 04:53:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 04:53:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:56,734 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:53:56,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:56,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:56,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:56,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:56,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:53:56,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:56,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:56,761 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 04:53:56,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083569299] [2020-10-27 04:53:56,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:56,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:56,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510648068] [2020-10-27 04:53:56,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:56,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:56,763 INFO L87 Difference]: Start difference. First operand 18235 states and 26433 transitions. Second operand 5 states. [2020-10-27 04:53:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:58,738 INFO L93 Difference]: Finished difference Result 26970 states and 39075 transitions. [2020-10-27 04:53:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:53:58,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 04:53:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:58,767 INFO L225 Difference]: With dead ends: 26970 [2020-10-27 04:53:58,767 INFO L226 Difference]: Without dead ends: 15547 [2020-10-27 04:53:58,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:53:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15547 states. [2020-10-27 04:54:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15547 to 15547. [2020-10-27 04:54:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15547 states. [2020-10-27 04:54:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15547 states to 15547 states and 22485 transitions. [2020-10-27 04:54:00,524 INFO L78 Accepts]: Start accepts. Automaton has 15547 states and 22485 transitions. Word has length 73 [2020-10-27 04:54:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:54:00,524 INFO L481 AbstractCegarLoop]: Abstraction has 15547 states and 22485 transitions. [2020-10-27 04:54:00,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:54:00,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15547 states and 22485 transitions. [2020-10-27 04:54:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:54:00,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:54:00,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:54:00,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 04:54:00,532 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:54:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:54:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -651592742, now seen corresponding path program 1 times [2020-10-27 04:54:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:54:00,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883036478] [2020-10-27 04:54:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:54:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:00,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:00,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:05,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:05,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 04:54:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:05,939 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:54:05,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:54:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:05,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:05,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:54:05,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:54:05,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 04:54:05,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:54:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:54:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:54:05,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:06,019 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 04:54:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883036478] [2020-10-27 04:54:06,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:54:06,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:54:06,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484327430] [2020-10-27 04:54:06,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:54:06,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:54:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:54:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:54:06,034 INFO L87 Difference]: Start difference. First operand 15547 states and 22485 transitions. Second operand 8 states. [2020-10-27 04:54:06,429 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:54:07,772 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 04:54:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:54:10,094 INFO L93 Difference]: Finished difference Result 36499 states and 53100 transitions. [2020-10-27 04:54:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:54:10,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-27 04:54:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:54:10,125 INFO L225 Difference]: With dead ends: 36499 [2020-10-27 04:54:10,125 INFO L226 Difference]: Without dead ends: 22190 [2020-10-27 04:54:10,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:54:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22190 states. [2020-10-27 04:54:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22190 to 16501. [2020-10-27 04:54:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16501 states. [2020-10-27 04:54:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16501 states to 16501 states and 23489 transitions. [2020-10-27 04:54:12,255 INFO L78 Accepts]: Start accepts. Automaton has 16501 states and 23489 transitions. Word has length 75 [2020-10-27 04:54:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:54:12,255 INFO L481 AbstractCegarLoop]: Abstraction has 16501 states and 23489 transitions. [2020-10-27 04:54:12,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:54:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 16501 states and 23489 transitions. [2020-10-27 04:54:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:54:12,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:54:12,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:54:12,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 04:54:12,264 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:54:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:54:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -793795534, now seen corresponding path program 1 times [2020-10-27 04:54:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:54:12,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309122399] [2020-10-27 04:54:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:54:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:14,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:14,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:54:14,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2406 [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 04:54:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:15,035 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:54:15,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:54:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:15,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:54:15,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:54:15,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:54:15,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:15,069 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 04:54:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309122399] [2020-10-27 04:54:15,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:54:15,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:54:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866980192] [2020-10-27 04:54:15,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:54:15,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:54:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:54:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:54:15,072 INFO L87 Difference]: Start difference. First operand 16501 states and 23489 transitions. Second operand 4 states. [2020-10-27 04:54:15,485 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:54:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:54:18,730 INFO L93 Difference]: Finished difference Result 36841 states and 53228 transitions. [2020-10-27 04:54:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:54:18,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-27 04:54:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:54:18,766 INFO L225 Difference]: With dead ends: 36841 [2020-10-27 04:54:18,766 INFO L226 Difference]: Without dead ends: 26730 [2020-10-27 04:54:18,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:54:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26730 states. [2020-10-27 04:54:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26730 to 26727. [2020-10-27 04:54:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26727 states. [2020-10-27 04:54:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26727 states to 26727 states and 38328 transitions. [2020-10-27 04:54:21,911 INFO L78 Accepts]: Start accepts. Automaton has 26727 states and 38328 transitions. Word has length 75 [2020-10-27 04:54:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:54:21,911 INFO L481 AbstractCegarLoop]: Abstraction has 26727 states and 38328 transitions. [2020-10-27 04:54:21,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:54:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26727 states and 38328 transitions. [2020-10-27 04:54:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:54:21,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:54:21,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:54:21,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 04:54:21,919 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:54:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:54:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash -123920501, now seen corresponding path program 1 times [2020-10-27 04:54:21,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:54:21,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24214023] [2020-10-27 04:54:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:54:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:23,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:23,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:54:23,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:54:23,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-27 04:54:23,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:54:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 04:54:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 04:54:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:23,518 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:54:23,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:54:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:23,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:23,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:54:23,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:54:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:54:23,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:54:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:54:23,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:54:23,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:23,547 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 04:54:23,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24214023] [2020-10-27 04:54:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:54:23,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:54:23,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760217426] [2020-10-27 04:54:23,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:54:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:54:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:54:23,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:54:23,550 INFO L87 Difference]: Start difference. First operand 26727 states and 38328 transitions. Second operand 6 states. [2020-10-27 04:54:23,945 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 04:54:25,477 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:54:26,005 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:54:26,498 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 04:54:26,870 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:54:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:54:36,005 INFO L93 Difference]: Finished difference Result 109797 states and 157656 transitions. [2020-10-27 04:54:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 04:54:36,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-27 04:54:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:54:36,229 INFO L225 Difference]: With dead ends: 109797 [2020-10-27 04:54:36,230 INFO L226 Difference]: Without dead ends: 85748 [2020-10-27 04:54:36,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:54:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85748 states. [2020-10-27 04:54:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85748 to 73131. [2020-10-27 04:54:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73131 states. [2020-10-27 04:54:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73131 states to 73131 states and 103764 transitions. [2020-10-27 04:54:45,177 INFO L78 Accepts]: Start accepts. Automaton has 73131 states and 103764 transitions. Word has length 75 [2020-10-27 04:54:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:54:45,177 INFO L481 AbstractCegarLoop]: Abstraction has 73131 states and 103764 transitions. [2020-10-27 04:54:45,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:54:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 73131 states and 103764 transitions. [2020-10-27 04:54:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 04:54:45,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:54:45,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:54:45,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 04:54:45,186 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:54:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:54:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash -610228639, now seen corresponding path program 1 times [2020-10-27 04:54:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:54:45,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681044124] [2020-10-27 04:54:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:54:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:45,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 04:54:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:54:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 04:54:50,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:54:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 04:54:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 04:54:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:50,610 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:54:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:54:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:50,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:50,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 04:54:50,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:50,666 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 04:54:50,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681044124] [2020-10-27 04:54:50,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:54:50,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 04:54:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688508638] [2020-10-27 04:54:50,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:54:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:54:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:54:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:54:50,669 INFO L87 Difference]: Start difference. First operand 73131 states and 103764 transitions. Second operand 8 states. [2020-10-27 04:54:51,078 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:54:52,975 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 04:55:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:55:04,309 INFO L93 Difference]: Finished difference Result 144417 states and 204368 transitions. [2020-10-27 04:55:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:55:04,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-27 04:55:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:55:04,511 INFO L225 Difference]: With dead ends: 144417 [2020-10-27 04:55:04,512 INFO L226 Difference]: Without dead ends: 101952 [2020-10-27 04:55:04,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:55:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101952 states. [2020-10-27 04:55:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101952 to 72563. [2020-10-27 04:55:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72563 states. [2020-10-27 04:55:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72563 states to 72563 states and 102938 transitions. [2020-10-27 04:55:13,858 INFO L78 Accepts]: Start accepts. Automaton has 72563 states and 102938 transitions. Word has length 75 [2020-10-27 04:55:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:55:13,858 INFO L481 AbstractCegarLoop]: Abstraction has 72563 states and 102938 transitions. [2020-10-27 04:55:13,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:55:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 72563 states and 102938 transitions. [2020-10-27 04:55:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 04:55:13,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:55:13,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:55:13,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 04:55:13,866 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:55:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:55:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1069139418, now seen corresponding path program 1 times [2020-10-27 04:55:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:55:13,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302278693] [2020-10-27 04:55:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:55:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:55:13,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:14,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 04:55:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:55:14,783 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:55:14,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:55:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:55:14,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:14,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:55:14,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:55:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:55:14,817 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 04:55:14,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302278693] [2020-10-27 04:55:14,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:55:14,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:55:14,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912074872] [2020-10-27 04:55:14,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:55:14,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:55:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:55:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:55:14,819 INFO L87 Difference]: Start difference. First operand 72563 states and 102938 transitions. Second operand 6 states. [2020-10-27 04:55:15,210 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:55:17,201 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:55:17,544 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 04:55:18,426 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:55:19,098 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:55:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:55:34,777 INFO L93 Difference]: Finished difference Result 209547 states and 300421 transitions. [2020-10-27 04:55:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 04:55:34,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-27 04:55:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:55:35,074 INFO L225 Difference]: With dead ends: 209547 [2020-10-27 04:55:35,075 INFO L226 Difference]: Without dead ends: 139396 [2020-10-27 04:55:35,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:55:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139396 states. [2020-10-27 04:55:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139396 to 96610. [2020-10-27 04:55:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96610 states. [2020-10-27 04:55:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96610 states to 96610 states and 138456 transitions. [2020-10-27 04:55:47,717 INFO L78 Accepts]: Start accepts. Automaton has 96610 states and 138456 transitions. Word has length 76 [2020-10-27 04:55:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:55:47,718 INFO L481 AbstractCegarLoop]: Abstraction has 96610 states and 138456 transitions. [2020-10-27 04:55:47,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:55:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 96610 states and 138456 transitions. [2020-10-27 04:55:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 04:55:47,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:55:47,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:55:47,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 04:55:47,725 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:55:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:55:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash -324125461, now seen corresponding path program 1 times [2020-10-27 04:55:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:55:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033635319] [2020-10-27 04:55:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:55:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:55:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:47,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:55:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking...