/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:19:09,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:19:09,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:19:09,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:19:09,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:19:09,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:19:09,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:19:09,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:19:09,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:19:09,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:19:09,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:19:09,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:19:09,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:19:09,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:19:09,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:19:09,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:19:09,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:19:09,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:19:09,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:19:09,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:19:09,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:19:09,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:19:09,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:19:09,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:19:09,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:19:09,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:19:09,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:19:09,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:19:09,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:19:09,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:19:09,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:19:09,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:19:09,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:19:09,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:19:09,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:19:09,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:19:09,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:19:09,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:19:09,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:19:09,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:19:09,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:19:09,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:19:09,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:19:09,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:19:09,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:19:09,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:19:09,465 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:19:09,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:19:09,466 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:19:09,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:19:09,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:19:09,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:19:09,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:19:09,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:19:09,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:19:09,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:19:09,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:19:09,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:19:09,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:19:09,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:19:09,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:19:09,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:19:09,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:19:09,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:19:09,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:19:09,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:19:09,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:19:09,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:19:09,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:19:09,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:19:09,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:19:09,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:19:09,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:19:09,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:19:09,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:19:09,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:19:09,975 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:19:09,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44.c [2020-10-28 10:19:10,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615dc98fe/66e1ae69ecac450f9c68c2933de7fdc3/FLAG7ff7c7af3 [2020-10-28 10:19:10,889 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:19:10,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label44.c [2020-10-28 10:19:10,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615dc98fe/66e1ae69ecac450f9c68c2933de7fdc3/FLAG7ff7c7af3 [2020-10-28 10:19:11,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/615dc98fe/66e1ae69ecac450f9c68c2933de7fdc3 [2020-10-28 10:19:11,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:19:11,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:19:11,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:19:11,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:19:11,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:19:11,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:19:11" (1/1) ... [2020-10-28 10:19:11,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15bdcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:11, skipping insertion in model container [2020-10-28 10:19:11,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:19:11" (1/1) ... [2020-10-28 10:19:11,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:19:11,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:19:11,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:19:12,014 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:19:12,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:19:12,346 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:19:12,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12 WrapperNode [2020-10-28 10:19:12,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:19:12,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:19:12,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:19:12,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:19:12,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... [2020-10-28 10:19:12,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:19:12,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:19:12,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:19:12,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:19:12,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:19:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:19:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:19:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:19:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:19:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:19:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:19:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:19:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:19:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:19:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:19:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:19:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:19:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:19:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:19:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:19:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:19:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:19:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:19:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:19:15,044 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:19:15,044 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:19:15,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:19:15 BoogieIcfgContainer [2020-10-28 10:19:15,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:19:15,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:19:15,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:19:15,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:19:15,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:19:11" (1/3) ... [2020-10-28 10:19:15,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b490f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:19:15, skipping insertion in model container [2020-10-28 10:19:15,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:19:12" (2/3) ... [2020-10-28 10:19:15,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b490f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:19:15, skipping insertion in model container [2020-10-28 10:19:15,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:19:15" (3/3) ... [2020-10-28 10:19:15,057 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2020-10-28 10:19:15,071 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:19:15,077 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:19:15,094 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:19:15,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:19:15,125 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:19:15,125 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:19:15,126 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:19:15,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:19:15,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:19:15,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:19:15,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:19:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:19:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-28 10:19:15,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:15,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:15,172 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash -764952528, now seen corresponding path program 1 times [2020-10-28 10:19:15,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:15,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134622326] [2020-10-28 10:19:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:15,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:19,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:19,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-28 10:19:19,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:19:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4069 [2020-10-28 10:19:19,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:19,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:19,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:19:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:19:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-28 10:19:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:19:20,207 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:20,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:20,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:20,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:20,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:19:20,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:20,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:20,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:19:20,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:19:20,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134622326] [2020-10-28 10:19:20,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:19:20,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:19:20,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760904711] [2020-10-28 10:19:20,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:19:20,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:19:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:19:20,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:19:20,420 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:19:20,762 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:19:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:19:24,453 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-28 10:19:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:19:24,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2020-10-28 10:19:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:19:24,475 INFO L225 Difference]: With dead ends: 889 [2020-10-28 10:19:24,476 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 10:19:24,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:19:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 10:19:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-28 10:19:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 10:19:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-28 10:19:24,585 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 184 [2020-10-28 10:19:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:19:24,587 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-28 10:19:24,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:19:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-28 10:19:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 10:19:24,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:24,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:24,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:19:24,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash -77976735, now seen corresponding path program 1 times [2020-10-28 10:19:24,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:24,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451939166] [2020-10-28 10:19:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:27,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:27,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 10:19:27,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2794 [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:19:27,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 10:19:27,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:19:27,937 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:27,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:27,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:27,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:27,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:27,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:27,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:28,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:19:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:28,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:28,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:28,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:19:28,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:19:28,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:28,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:19:28,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:19:28,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451939166] [2020-10-28 10:19:28,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:19:28,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:19:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939166202] [2020-10-28 10:19:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:19:28,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:19:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:19:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:19:28,169 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 5 states. [2020-10-28 10:19:28,519 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:19:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:19:32,179 INFO L93 Difference]: Finished difference Result 1396 states and 2172 transitions. [2020-10-28 10:19:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:19:32,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-28 10:19:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:19:32,190 INFO L225 Difference]: With dead ends: 1396 [2020-10-28 10:19:32,190 INFO L226 Difference]: Without dead ends: 926 [2020-10-28 10:19:32,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:19:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-10-28 10:19:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 904. [2020-10-28 10:19:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-10-28 10:19:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1372 transitions. [2020-10-28 10:19:32,269 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1372 transitions. Word has length 193 [2020-10-28 10:19:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:19:32,271 INFO L481 AbstractCegarLoop]: Abstraction has 904 states and 1372 transitions. [2020-10-28 10:19:32,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:19:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1372 transitions. [2020-10-28 10:19:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 10:19:32,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:32,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:32,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:19:32,283 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 392601999, now seen corresponding path program 1 times [2020-10-28 10:19:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800728002] [2020-10-28 10:19:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:32,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:34,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:34,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-28 10:19:34,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:19:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2617 [2020-10-28 10:19:34,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:34,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:19:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:19:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 10:19:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:19:35,328 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:35,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:35,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:35,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:35,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:35,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:19:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:35,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:35,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:19:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:19:35,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:19:35,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800728002] [2020-10-28 10:19:35,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:19:35,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:19:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360505960] [2020-10-28 10:19:35,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:19:35,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:19:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:19:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:19:35,587 INFO L87 Difference]: Start difference. First operand 904 states and 1372 transitions. Second operand 5 states. [2020-10-28 10:19:36,014 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:19:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:19:39,238 INFO L93 Difference]: Finished difference Result 2645 states and 4087 transitions. [2020-10-28 10:19:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:19:39,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-10-28 10:19:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:19:39,252 INFO L225 Difference]: With dead ends: 2645 [2020-10-28 10:19:39,252 INFO L226 Difference]: Without dead ends: 1747 [2020-10-28 10:19:39,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:19:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2020-10-28 10:19:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1740. [2020-10-28 10:19:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1740 states. [2020-10-28 10:19:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2376 transitions. [2020-10-28 10:19:39,337 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2376 transitions. Word has length 196 [2020-10-28 10:19:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:19:39,338 INFO L481 AbstractCegarLoop]: Abstraction has 1740 states and 2376 transitions. [2020-10-28 10:19:39,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:19:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2376 transitions. [2020-10-28 10:19:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 10:19:39,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:39,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:39,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:19:39,346 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1805555469, now seen corresponding path program 1 times [2020-10-28 10:19:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:39,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809565800] [2020-10-28 10:19:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:41,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:41,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 10:19:41,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:19:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-28 10:19:41,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:41,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:19:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:19:41,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 10:19:41,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:42,024 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:42,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:42,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:42,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:42,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:19:42,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:42,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:42,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:42,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:42,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:19:42,197 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:19:42,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:19:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:42,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:42,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:19:42,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:42,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 10:19:42,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:42,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:19:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:19:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:19:42,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809565800] [2020-10-28 10:19:42,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:19:42,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:19:42,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640638700] [2020-10-28 10:19:42,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:19:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:19:42,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:19:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:19:42,420 INFO L87 Difference]: Start difference. First operand 1740 states and 2376 transitions. Second operand 5 states. [2020-10-28 10:19:42,811 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:19:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:19:46,241 INFO L93 Difference]: Finished difference Result 4751 states and 6663 transitions. [2020-10-28 10:19:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:19:46,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 203 [2020-10-28 10:19:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:19:46,265 INFO L225 Difference]: With dead ends: 4751 [2020-10-28 10:19:46,265 INFO L226 Difference]: Without dead ends: 3017 [2020-10-28 10:19:46,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:19:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-10-28 10:19:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2579. [2020-10-28 10:19:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2579 states. [2020-10-28 10:19:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 3662 transitions. [2020-10-28 10:19:46,382 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 3662 transitions. Word has length 203 [2020-10-28 10:19:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:19:46,383 INFO L481 AbstractCegarLoop]: Abstraction has 2579 states and 3662 transitions. [2020-10-28 10:19:46,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:19:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 3662 transitions. [2020-10-28 10:19:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-28 10:19:46,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:46,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:46,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:19:46,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash 933002735, now seen corresponding path program 1 times [2020-10-28 10:19:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:46,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22377863] [2020-10-28 10:19:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:46,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:46,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:46,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:47,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:51,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:51,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 10:19:51,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:19:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-28 10:19:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:19:51,861 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:51,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:51,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:51,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:19:51,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:51,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:51,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:19:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:52,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:52,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 10:19:52,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:52,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:19:52,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:52,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:52,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:19:52,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 10:19:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:52,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:52,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:19:52,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:19:52,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:19:52,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:52,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:19:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:19:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22377863] [2020-10-28 10:19:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:19:52,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:19:52,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998899002] [2020-10-28 10:19:52,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:19:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:19:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:19:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:19:52,162 INFO L87 Difference]: Start difference. First operand 2579 states and 3662 transitions. Second operand 5 states. [2020-10-28 10:19:52,752 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:19:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:19:55,758 INFO L93 Difference]: Finished difference Result 7672 states and 10984 transitions. [2020-10-28 10:19:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:19:55,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2020-10-28 10:19:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:19:55,776 INFO L225 Difference]: With dead ends: 7672 [2020-10-28 10:19:55,776 INFO L226 Difference]: Without dead ends: 2582 [2020-10-28 10:19:55,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:19:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2020-10-28 10:19:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2578. [2020-10-28 10:19:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2020-10-28 10:19:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3660 transitions. [2020-10-28 10:19:55,896 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3660 transitions. Word has length 212 [2020-10-28 10:19:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:19:55,896 INFO L481 AbstractCegarLoop]: Abstraction has 2578 states and 3660 transitions. [2020-10-28 10:19:55,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:19:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3660 transitions. [2020-10-28 10:19:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 10:19:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:19:55,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:19:55,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:19:55,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:19:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:19:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2080803544, now seen corresponding path program 1 times [2020-10-28 10:19:55,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:19:55,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930296474] [2020-10-28 10:19:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:19:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:56,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3304 [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:19:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 10:19:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 10:19:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:59,715 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:19:59,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:19:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:59,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:59,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:59,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:19:59,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:59,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:19:59,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:59,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:59,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:19:59,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:59,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:19:59,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:19:59,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:19:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:19:59,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:19:59,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:19:59,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:19:59,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 10:19:59,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:20:00,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930296474] [2020-10-28 10:20:00,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:00,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:20:00,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242842098] [2020-10-28 10:20:00,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:20:00,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:20:00,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:20:00,093 INFO L87 Difference]: Start difference. First operand 2578 states and 3660 transitions. Second operand 5 states. [2020-10-28 10:20:00,467 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:20:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:04,069 INFO L93 Difference]: Finished difference Result 7684 states and 11185 transitions. [2020-10-28 10:20:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:20:04,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-28 10:20:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:04,111 INFO L225 Difference]: With dead ends: 7684 [2020-10-28 10:20:04,112 INFO L226 Difference]: Without dead ends: 5112 [2020-10-28 10:20:04,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:20:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2020-10-28 10:20:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 4676. [2020-10-28 10:20:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4676 states. [2020-10-28 10:20:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 6745 transitions. [2020-10-28 10:20:04,319 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 6745 transitions. Word has length 220 [2020-10-28 10:20:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:04,320 INFO L481 AbstractCegarLoop]: Abstraction has 4676 states and 6745 transitions. [2020-10-28 10:20:04,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:20:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 6745 transitions. [2020-10-28 10:20:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 10:20:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:04,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:20:04,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 757458375, now seen corresponding path program 1 times [2020-10-28 10:20:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537180930] [2020-10-28 10:20:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:04,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:04,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:09,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:09,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 10:20:09,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:20:09,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-28 10:20:09,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:09,740 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:09,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:09,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:09,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:09,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:09,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:09,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:09,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:09,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:20:09,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:09,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 10:20:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:09,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:10,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:20:10,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 59 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:20:10,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537180930] [2020-10-28 10:20:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:10,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:20:10,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832969181] [2020-10-28 10:20:10,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:20:10,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:20:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:20:10,368 INFO L87 Difference]: Start difference. First operand 4676 states and 6745 transitions. Second operand 6 states. [2020-10-28 10:20:10,766 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:14,355 INFO L93 Difference]: Finished difference Result 13451 states and 20849 transitions. [2020-10-28 10:20:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:20:14,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 240 [2020-10-28 10:20:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:14,418 INFO L225 Difference]: With dead ends: 13451 [2020-10-28 10:20:14,418 INFO L226 Difference]: Without dead ends: 8781 [2020-10-28 10:20:14,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:20:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8781 states. [2020-10-28 10:20:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8781 to 8485. [2020-10-28 10:20:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8485 states. [2020-10-28 10:20:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8485 states to 8485 states and 12438 transitions. [2020-10-28 10:20:14,918 INFO L78 Accepts]: Start accepts. Automaton has 8485 states and 12438 transitions. Word has length 240 [2020-10-28 10:20:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:14,918 INFO L481 AbstractCegarLoop]: Abstraction has 8485 states and 12438 transitions. [2020-10-28 10:20:14,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:20:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8485 states and 12438 transitions. [2020-10-28 10:20:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 10:20:14,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:14,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:14,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:20:14,948 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1570965649, now seen corresponding path program 1 times [2020-10-28 10:20:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:14,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380897819] [2020-10-28 10:20:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:15,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4760 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:20:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:20:19,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-28 10:20:19,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:20,090 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:20,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:20,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:20,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:20,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:20,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:20,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:20:20,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:20:20,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:20:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:20,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:20,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:20:20,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:20,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 10:20:20,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:20,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:20:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:20:20,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380897819] [2020-10-28 10:20:20,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:20,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:20:20,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136860047] [2020-10-28 10:20:20,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:20:20,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:20:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:20:20,582 INFO L87 Difference]: Start difference. First operand 8485 states and 12438 transitions. Second operand 7 states. [2020-10-28 10:20:21,085 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:20:21,383 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:27,007 INFO L93 Difference]: Finished difference Result 21216 states and 34389 transitions. [2020-10-28 10:20:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:20:27,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-28 10:20:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:27,109 INFO L225 Difference]: With dead ends: 21216 [2020-10-28 10:20:27,109 INFO L226 Difference]: Without dead ends: 12737 [2020-10-28 10:20:27,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:20:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2020-10-28 10:20:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 12325. [2020-10-28 10:20:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12325 states. [2020-10-28 10:20:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 18461 transitions. [2020-10-28 10:20:27,764 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 18461 transitions. Word has length 241 [2020-10-28 10:20:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:27,765 INFO L481 AbstractCegarLoop]: Abstraction has 12325 states and 18461 transitions. [2020-10-28 10:20:27,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:20:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 18461 transitions. [2020-10-28 10:20:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 10:20:27,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:27,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:27,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:20:27,814 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash -469778570, now seen corresponding path program 1 times [2020-10-28 10:20:27,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:27,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884747217] [2020-10-28 10:20:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:32,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:32,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 10:20:32,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:20:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:20:32,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:33,203 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:33,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:33,392 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:20:33,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:33,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:33,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 10:20:33,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:33,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:20:33,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:33,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:33,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:20:33,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:33,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 10:20:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:33,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:33,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:20:33,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 10:20:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:33,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 10:20:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:33,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:20:33,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:33,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 10:20:33,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:33,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:33,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:20:33,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:20:33,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884747217] [2020-10-28 10:20:33,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:33,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:20:33,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216357320] [2020-10-28 10:20:33,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:20:33,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:20:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:20:33,916 INFO L87 Difference]: Start difference. First operand 12325 states and 18461 transitions. Second operand 8 states. [2020-10-28 10:20:34,324 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:34,921 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:20:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:41,365 INFO L93 Difference]: Finished difference Result 48681 states and 84024 transitions. [2020-10-28 10:20:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:20:41,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-10-28 10:20:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:41,648 INFO L225 Difference]: With dead ends: 48681 [2020-10-28 10:20:41,648 INFO L226 Difference]: Without dead ends: 36362 [2020-10-28 10:20:41,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:20:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36362 states. [2020-10-28 10:20:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36362 to 35256. [2020-10-28 10:20:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35256 states. [2020-10-28 10:20:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35256 states to 35256 states and 54735 transitions. [2020-10-28 10:20:43,663 INFO L78 Accepts]: Start accepts. Automaton has 35256 states and 54735 transitions. Word has length 263 [2020-10-28 10:20:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:43,664 INFO L481 AbstractCegarLoop]: Abstraction has 35256 states and 54735 transitions. [2020-10-28 10:20:43,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:20:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 35256 states and 54735 transitions. [2020-10-28 10:20:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 10:20:43,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:43,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:43,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:20:43,843 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2062083732, now seen corresponding path program 1 times [2020-10-28 10:20:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:43,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598011072] [2020-10-28 10:20:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:48,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 10:20:48,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:49,192 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:49,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:49,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:49,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:49,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:49,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:49,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:20:49,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:20:49,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:49,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:20:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 10:20:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:49,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 10:20:49,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 10:20:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:49,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:49,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:20:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:20:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 10:20:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598011072] [2020-10-28 10:20:49,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:49,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:20:49,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826625637] [2020-10-28 10:20:49,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:20:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:20:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:20:49,663 INFO L87 Difference]: Start difference. First operand 35256 states and 54735 transitions. Second operand 8 states. [2020-10-28 10:20:49,944 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:20:50,777 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:20:51,788 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:20:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:55,902 INFO L93 Difference]: Finished difference Result 108525 states and 173802 transitions. [2020-10-28 10:20:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:20:55,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 264 [2020-10-28 10:20:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:56,292 INFO L225 Difference]: With dead ends: 108525 [2020-10-28 10:20:56,292 INFO L226 Difference]: Without dead ends: 73275 [2020-10-28 10:20:56,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-28 10:20:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73275 states. [2020-10-28 10:20:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73275 to 71304. [2020-10-28 10:20:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71304 states. [2020-10-28 10:20:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71304 states to 71304 states and 104084 transitions. [2020-10-28 10:20:59,339 INFO L78 Accepts]: Start accepts. Automaton has 71304 states and 104084 transitions. Word has length 264 [2020-10-28 10:20:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:59,339 INFO L481 AbstractCegarLoop]: Abstraction has 71304 states and 104084 transitions. [2020-10-28 10:20:59,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:20:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 71304 states and 104084 transitions. [2020-10-28 10:20:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-28 10:20:59,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:59,518 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:59,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:20:59,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:59,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2027112063, now seen corresponding path program 1 times [2020-10-28 10:20:59,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:59,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151262867] [2020-10-28 10:20:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:59,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:59,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:01,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:02,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 10:21:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 10:21:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:04,847 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:04,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:04,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:04,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:04,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:04,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:04,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:04,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:21:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:04,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:04,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:04,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:05,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:21:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:05,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:21:05,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 10:21:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:05,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:05,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:05,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:21:05,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 10:21:05,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151262867] [2020-10-28 10:21:05,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:05,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:21:05,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582669789] [2020-10-28 10:21:05,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:05,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:05,302 INFO L87 Difference]: Start difference. First operand 71304 states and 104084 transitions. Second operand 7 states. [2020-10-28 10:21:05,837 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:06,150 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:16,125 INFO L93 Difference]: Finished difference Result 264809 states and 433990 transitions. [2020-10-28 10:21:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:21:16,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 281 [2020-10-28 10:21:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:18,100 INFO L225 Difference]: With dead ends: 264809 [2020-10-28 10:21:18,100 INFO L226 Difference]: Without dead ends: 194145 [2020-10-28 10:21:18,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:21:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194145 states. [2020-10-28 10:21:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194145 to 193687. [2020-10-28 10:21:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193687 states. [2020-10-28 10:21:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193687 states to 193687 states and 315450 transitions. [2020-10-28 10:21:29,463 INFO L78 Accepts]: Start accepts. Automaton has 193687 states and 315450 transitions. Word has length 281 [2020-10-28 10:21:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:29,464 INFO L481 AbstractCegarLoop]: Abstraction has 193687 states and 315450 transitions. [2020-10-28 10:21:29,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:21:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 193687 states and 315450 transitions. [2020-10-28 10:21:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-28 10:21:30,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:30,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:21:30,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:21:30,661 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash 539169782, now seen corresponding path program 1 times [2020-10-28 10:21:30,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:30,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062000298] [2020-10-28 10:21:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:30,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:30,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:30,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:31,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:31,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:35,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:35,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 10:21:35,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 10:21:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 10:21:35,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:35,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:21:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:21:35,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:21:35,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,038 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,169 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:21:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:21:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:21:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:21:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:21:36,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:21:36,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:21:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:21:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 10:21:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 10:21:36,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:36,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 10:21:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:36,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-28 10:21:36,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062000298] [2020-10-28 10:21:36,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:36,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:21:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853114891] [2020-10-28 10:21:36,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:36,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:36,533 INFO L87 Difference]: Start difference. First operand 193687 states and 315450 transitions. Second operand 7 states. [2020-10-28 10:21:36,997 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:39,240 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:21:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:52,419 INFO L93 Difference]: Finished difference Result 378679 states and 720443 transitions. [2020-10-28 10:21:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:21:52,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-28 10:21:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:54,849 INFO L225 Difference]: With dead ends: 378679 [2020-10-28 10:21:54,850 INFO L226 Difference]: Without dead ends: 186508 [2020-10-28 10:21:55,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:21:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186508 states. [2020-10-28 10:22:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186508 to 175346. [2020-10-28 10:22:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175346 states. [2020-10-28 10:22:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175346 states to 175346 states and 265241 transitions. [2020-10-28 10:22:07,547 INFO L78 Accepts]: Start accepts. Automaton has 175346 states and 265241 transitions. Word has length 295 [2020-10-28 10:22:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:07,548 INFO L481 AbstractCegarLoop]: Abstraction has 175346 states and 265241 transitions. [2020-10-28 10:22:07,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:22:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 175346 states and 265241 transitions. [2020-10-28 10:22:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 10:22:08,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:08,608 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:22:08,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:22:08,609 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 996189635, now seen corresponding path program 1 times [2020-10-28 10:22:08,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:08,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263919491] [2020-10-28 10:22:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:08,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:08,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:10,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:13,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:22:13,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 10:22:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:13,999 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:22:14,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:22:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:14,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:22:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:14,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:14,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:22:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:14,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:22:14,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:14,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:22:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:14,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 10:22:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:14,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:22:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:14,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 10:22:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:14,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 10:22:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:14,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:22:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:14,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 164 proven. 58 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 10:22:14,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263919491] [2020-10-28 10:22:14,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:22:14,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:22:14,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183955794] [2020-10-28 10:22:14,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:22:14,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:22:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:22:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:22:14,805 INFO L87 Difference]: Start difference. First operand 175346 states and 265241 transitions. Second operand 8 states. [2020-10-28 10:22:15,269 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:22:15,530 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160