/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_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:20:14,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:20:14,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:20:14,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:20:14,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:20:14,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:20:14,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:20:14,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:20:14,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:20:14,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:20:14,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:20:14,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:20:14,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:20:14,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:20:14,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:20:14,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:20:14,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:20:14,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:20:14,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:20:14,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:20:14,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:20:14,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:20:14,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:20:14,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:20:14,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:20:14,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:20:14,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:20:14,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:20:14,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:20:14,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:20:14,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:20:14,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:20:14,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:20:14,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:20:14,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:20:14,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:20:14,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:20:14,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:20:14,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:20:14,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:20:14,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:20:14,457 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 10:20:14,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:20:14,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:20:14,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:20:14,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:20:14,519 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:20:14,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:20:14,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:20:14,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:20:14,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:20:14,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:20:14,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:20:14,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:20:14,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:20:14,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:20:14,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:20:14,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:20:14,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:20:14,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:20:14,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:20:14,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:20:14,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:20:14,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:20:14,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:20:14,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:20:14,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:20:14,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:20:14,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:20:14,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:20:14,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:20:14,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:20:14,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:20:15,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:20:15,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:20:15,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:20:15,039 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:20:15,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label47.c [2020-10-28 10:20:15,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03a7478fa/c4af8cd430c643f1a19c003dc8fd30bf/FLAGda3e7bbfa [2020-10-28 10:20:15,964 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:20:15,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label47.c [2020-10-28 10:20:15,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03a7478fa/c4af8cd430c643f1a19c003dc8fd30bf/FLAGda3e7bbfa [2020-10-28 10:20:16,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03a7478fa/c4af8cd430c643f1a19c003dc8fd30bf [2020-10-28 10:20:16,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:20:16,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:20:16,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:20:16,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:20:16,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:20:16,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:20:16" (1/1) ... [2020-10-28 10:20:16,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d506c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:16, skipping insertion in model container [2020-10-28 10:20:16,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:20:16" (1/1) ... [2020-10-28 10:20:16,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:20:16,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:20:16,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:20:16,938 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:20:17,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:20:17,256 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:20:17,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17 WrapperNode [2020-10-28 10:20:17,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:20:17,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:20:17,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:20:17,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:20:17,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (1/1) ... [2020-10-28 10:20:17,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:20:17,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:20:17,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:20:17,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:20:17,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (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 10:20:17,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:20:17,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:20:17,523 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:20:17,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:20:17,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:20:17,523 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:20:17,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:20:17,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:20:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:20:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:20:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:20:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:20:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:20:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:20:19,486 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:20:19,486 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:20:19,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:20:19 BoogieIcfgContainer [2020-10-28 10:20:19,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:20:19,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:20:19,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:20:19,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:20:19,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:20:16" (1/3) ... [2020-10-28 10:20:19,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15abbff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:20:19, skipping insertion in model container [2020-10-28 10:20:19,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:20:17" (2/3) ... [2020-10-28 10:20:19,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15abbff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:20:19, skipping insertion in model container [2020-10-28 10:20:19,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:20:19" (3/3) ... [2020-10-28 10:20:19,498 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label47.c [2020-10-28 10:20:19,510 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:20:19,516 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:20:19,529 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:20:19,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:20:19,559 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:20:19,559 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:20:19,559 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:20:19,559 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:20:19,560 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:20:19,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:20:19,560 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:20:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:20:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-28 10:20:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:19,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:19,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1348345984, now seen corresponding path program 1 times [2020-10-28 10:20:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:19,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121976642] [2020-10-28 10:20:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:20,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:24,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:24,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-28 10:20:24,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:20:24,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4349 [2020-10-28 10:20:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:24,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:20:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:20:24,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-28 10:20:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 10:20:24,949 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:24,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:24,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:25,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:25,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:25,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:25,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:20:25,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:25,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:25,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:25,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:25,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:20:25,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:25,152 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 10:20:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121976642] [2020-10-28 10:20:25,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:20:25,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:20:25,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700961332] [2020-10-28 10:20:25,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:20:25,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:20:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:20:25,180 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:20:25,485 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:29,292 INFO L93 Difference]: Finished difference Result 894 states and 1553 transitions. [2020-10-28 10:20:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:20:29,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2020-10-28 10:20:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:29,325 INFO L225 Difference]: With dead ends: 894 [2020-10-28 10:20:29,326 INFO L226 Difference]: Without dead ends: 486 [2020-10-28 10:20:29,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:20:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-28 10:20:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 476. [2020-10-28 10:20:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 10:20:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 732 transitions. [2020-10-28 10:20:29,449 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 732 transitions. Word has length 204 [2020-10-28 10:20:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:29,451 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 732 transitions. [2020-10-28 10:20:29,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:20:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 732 transitions. [2020-10-28 10:20:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 10:20:29,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:29,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:29,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:20:29,468 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1507239073, now seen corresponding path program 1 times [2020-10-28 10:20:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:29,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668177257] [2020-10-28 10:20:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:29,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:33,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:33,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4166 [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:20:33,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 10:20:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:34,224 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:34,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:34,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:34,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:34,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:34,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:20:34,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:34,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:34,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:34,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:34,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:20:34,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:20:34,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:34,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:20:34,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:34,540 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 10:20:34,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668177257] [2020-10-28 10:20:34,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:34,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:20:34,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640015658] [2020-10-28 10:20:34,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:20:34,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:20:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:20:34,545 INFO L87 Difference]: Start difference. First operand 476 states and 732 transitions. Second operand 5 states. [2020-10-28 10:20:35,010 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:38,068 INFO L93 Difference]: Finished difference Result 1374 states and 2140 transitions. [2020-10-28 10:20:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:20:38,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 216 [2020-10-28 10:20:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:38,076 INFO L225 Difference]: With dead ends: 1374 [2020-10-28 10:20:38,076 INFO L226 Difference]: Without dead ends: 904 [2020-10-28 10:20:38,079 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 10:20:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-28 10:20:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 898. [2020-10-28 10:20:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-28 10:20:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1234 transitions. [2020-10-28 10:20:38,143 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1234 transitions. Word has length 216 [2020-10-28 10:20:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:38,144 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1234 transitions. [2020-10-28 10:20:38,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:20:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1234 transitions. [2020-10-28 10:20:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-28 10:20:38,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:38,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:38,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:20:38,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash 741005015, now seen corresponding path program 1 times [2020-10-28 10:20:38,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:38,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694888258] [2020-10-28 10:20:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:40,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 10:20:40,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:20:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2319 [2020-10-28 10:20:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:40,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 10:20:40,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 10:20:40,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:20:40,943 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:40,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:40,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:40,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:40,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:40,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:20:40,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:40,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:40,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:41,116 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:20:41,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:41,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:41,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:20:41,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:41,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 10:20:41,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:41,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:20:41,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:20:41,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694888258] [2020-10-28 10:20:41,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:41,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:20:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948227588] [2020-10-28 10:20:41,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:20:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:20:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:20:41,314 INFO L87 Difference]: Start difference. First operand 898 states and 1234 transitions. Second operand 5 states. [2020-10-28 10:20:41,568 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:44,750 INFO L93 Difference]: Finished difference Result 2650 states and 3706 transitions. [2020-10-28 10:20:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:20:44,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-28 10:20:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:44,768 INFO L225 Difference]: With dead ends: 2650 [2020-10-28 10:20:44,768 INFO L226 Difference]: Without dead ends: 1758 [2020-10-28 10:20:44,771 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 10:20:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2020-10-28 10:20:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1752. [2020-10-28 10:20:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1752 states. [2020-10-28 10:20:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2336 transitions. [2020-10-28 10:20:44,891 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2336 transitions. Word has length 220 [2020-10-28 10:20:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:44,892 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 2336 transitions. [2020-10-28 10:20:44,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:20:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2336 transitions. [2020-10-28 10:20:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 10:20:44,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:44,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:44,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:20:44,903 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2081458306, now seen corresponding path program 1 times [2020-10-28 10:20:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846538328] [2020-10-28 10:20:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:46,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:47,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:47,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2861 [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 10:20:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 10:20:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:48,195 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:48,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:48,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:48,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:48,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:48,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:48,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:20:48,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:48,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:48,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:48,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:48,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:48,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:48,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:20:48,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:48,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 10:20:48,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:48,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:48,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 10:20:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:20:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846538328] [2020-10-28 10:20:48,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:48,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:20:48,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962919902] [2020-10-28 10:20:48,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:20:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:20:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:20:48,585 INFO L87 Difference]: Start difference. First operand 1752 states and 2336 transitions. Second operand 6 states. [2020-10-28 10:20:49,007 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:20:51,091 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:20:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:20:53,669 INFO L93 Difference]: Finished difference Result 6268 states and 8627 transitions. [2020-10-28 10:20:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:20:53,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 249 [2020-10-28 10:20:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:20:53,708 INFO L225 Difference]: With dead ends: 6268 [2020-10-28 10:20:53,708 INFO L226 Difference]: Without dead ends: 4522 [2020-10-28 10:20:53,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:20:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2020-10-28 10:20:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 4478. [2020-10-28 10:20:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4478 states. [2020-10-28 10:20:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 6028 transitions. [2020-10-28 10:20:53,909 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 6028 transitions. Word has length 249 [2020-10-28 10:20:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:20:53,910 INFO L481 AbstractCegarLoop]: Abstraction has 4478 states and 6028 transitions. [2020-10-28 10:20:53,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:20:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 6028 transitions. [2020-10-28 10:20:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 10:20:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:20:53,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:20:53,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:20:53,929 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:20:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:20:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1069571109, now seen corresponding path program 1 times [2020-10-28 10:20:53,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:20:53,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049320614] [2020-10-28 10:20:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:20:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:54,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:56,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:59,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:59,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-28 10:20:59,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:20:59,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 10:20:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:20:59,464 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:20:59,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:20:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:59,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:59,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:59,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:20:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:59,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:59,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:20:59,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:59,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 10:20:59,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:59,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:20:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:20:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:20:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:20:59,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:20:59,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:20:59,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:20:59,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:20:59,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 10:20:59,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:20:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 10:20:59,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049320614] [2020-10-28 10:20:59,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:20:59,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:20:59,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409628780] [2020-10-28 10:20:59,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:20:59,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:20:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:20:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:20:59,806 INFO L87 Difference]: Start difference. First operand 4478 states and 6028 transitions. Second operand 5 states. [2020-10-28 10:21:00,386 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:03,878 INFO L93 Difference]: Finished difference Result 10837 states and 15120 transitions. [2020-10-28 10:21:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:21:03,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2020-10-28 10:21:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:03,920 INFO L225 Difference]: With dead ends: 10837 [2020-10-28 10:21:03,920 INFO L226 Difference]: Without dead ends: 6365 [2020-10-28 10:21:03,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 10:21:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2020-10-28 10:21:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6359. [2020-10-28 10:21:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6359 states. [2020-10-28 10:21:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6359 states to 6359 states and 8752 transitions. [2020-10-28 10:21:04,162 INFO L78 Accepts]: Start accepts. Automaton has 6359 states and 8752 transitions. Word has length 259 [2020-10-28 10:21:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:04,163 INFO L481 AbstractCegarLoop]: Abstraction has 6359 states and 8752 transitions. [2020-10-28 10:21:04,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:21:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6359 states and 8752 transitions. [2020-10-28 10:21:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 10:21:04,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:04,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:21:04,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:21:04,187 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1790807215, now seen corresponding path program 1 times [2020-10-28 10:21:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921441553] [2020-10-28 10:21:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:04,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:05,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:05,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-28 10:21:05,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:21:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 10:21:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:05,588 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:05,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:05,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:05,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:05,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:21:05,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:05,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:21:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:05,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:05,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:05,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:05,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:21:05,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:05,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 10:21:05,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:05,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:21:05,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:21:06,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921441553] [2020-10-28 10:21:06,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:21:06,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:21:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129063938] [2020-10-28 10:21:06,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:06,262 INFO L87 Difference]: Start difference. First operand 6359 states and 8752 transitions. Second operand 7 states. [2020-10-28 10:21:06,554 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:07,535 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:21:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:10,694 INFO L93 Difference]: Finished difference Result 17880 states and 25392 transitions. [2020-10-28 10:21:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:21:10,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-10-28 10:21:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:10,762 INFO L225 Difference]: With dead ends: 17880 [2020-10-28 10:21:10,762 INFO L226 Difference]: Without dead ends: 11527 [2020-10-28 10:21:10,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:21:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11527 states. [2020-10-28 10:21:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11527 to 11509. [2020-10-28 10:21:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11509 states. [2020-10-28 10:21:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11509 states to 11509 states and 15927 transitions. [2020-10-28 10:21:11,220 INFO L78 Accepts]: Start accepts. Automaton has 11509 states and 15927 transitions. Word has length 271 [2020-10-28 10:21:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:11,220 INFO L481 AbstractCegarLoop]: Abstraction has 11509 states and 15927 transitions. [2020-10-28 10:21:11,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:21:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11509 states and 15927 transitions. [2020-10-28 10:21:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-28 10:21:11,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:11,259 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:21:11,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:21:11,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 945071663, now seen corresponding path program 1 times [2020-10-28 10:21:11,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:11,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011587961] [2020-10-28 10:21:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:11,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:11,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:14,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:16,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:16,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-28 10:21:16,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:21:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 10:21:16,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:16,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:21:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:21:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 10:21:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:16,615 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:16,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:16,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:16,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:16,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:21:16,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:16,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:16,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:21:16,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 10:21:16,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:16,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:21:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 10:21:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:16,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:16,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:21:16,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 10:21:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:16,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 10:21:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:16,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:17,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:17,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:21:17,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 10:21:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011587961] [2020-10-28 10:21:17,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:17,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:21:17,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848353225] [2020-10-28 10:21:17,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:17,141 INFO L87 Difference]: Start difference. First operand 11509 states and 15927 transitions. Second operand 7 states. [2020-10-28 10:21:17,463 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:18,066 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:21:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:21,488 INFO L93 Difference]: Finished difference Result 28590 states and 41879 transitions. [2020-10-28 10:21:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:21:21,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-28 10:21:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:21,588 INFO L225 Difference]: With dead ends: 28590 [2020-10-28 10:21:21,588 INFO L226 Difference]: Without dead ends: 17087 [2020-10-28 10:21:21,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:21:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17087 states. [2020-10-28 10:21:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17087 to 16313. [2020-10-28 10:21:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16313 states. [2020-10-28 10:21:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16313 states to 16313 states and 22688 transitions. [2020-10-28 10:21:22,338 INFO L78 Accepts]: Start accepts. Automaton has 16313 states and 22688 transitions. Word has length 288 [2020-10-28 10:21:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:22,339 INFO L481 AbstractCegarLoop]: Abstraction has 16313 states and 22688 transitions. [2020-10-28 10:21:22,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:21:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 16313 states and 22688 transitions. [2020-10-28 10:21:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-28 10:21:22,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:22,396 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:22,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:21:22,396 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1898171802, now seen corresponding path program 1 times [2020-10-28 10:21:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:22,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908225826] [2020-10-28 10:21:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:27,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:27,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-28 10:21:27,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:21:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 10:21:27,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:27,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 10:21:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:21:27,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:27,824 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:27,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:27,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:27,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:27,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:21:27,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:28,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 10:21:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:28,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:28,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:21:28,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:28,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-28 10:21:28,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:28,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:28,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:21:28,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:21:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908225826] [2020-10-28 10:21:29,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:29,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:21:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389072707] [2020-10-28 10:21:29,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:29,089 INFO L87 Difference]: Start difference. First operand 16313 states and 22688 transitions. Second operand 7 states. [2020-10-28 10:21:29,624 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:21:29,970 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:21:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:35,212 INFO L93 Difference]: Finished difference Result 37164 states and 55910 transitions. [2020-10-28 10:21:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:21:35,213 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 294 [2020-10-28 10:21:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:35,346 INFO L225 Difference]: With dead ends: 37164 [2020-10-28 10:21:35,347 INFO L226 Difference]: Without dead ends: 20857 [2020-10-28 10:21:35,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:21:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2020-10-28 10:21:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 20330. [2020-10-28 10:21:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20330 states. [2020-10-28 10:21:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20330 states to 20330 states and 28563 transitions. [2020-10-28 10:21:36,240 INFO L78 Accepts]: Start accepts. Automaton has 20330 states and 28563 transitions. Word has length 294 [2020-10-28 10:21:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:36,241 INFO L481 AbstractCegarLoop]: Abstraction has 20330 states and 28563 transitions. [2020-10-28 10:21:36,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:21:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 20330 states and 28563 transitions. [2020-10-28 10:21:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-28 10:21:36,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:36,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:21:36,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:21:36,314 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash 430943766, now seen corresponding path program 1 times [2020-10-28 10:21:36,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:36,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084432631] [2020-10-28 10:21:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:38,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:41,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:41,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-28 10:21:41,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:21:41,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-28 10:21:41,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:41,862 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:41,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:41,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:41,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:41,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:21:41,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:41,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:41,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:41,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:41,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:41,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:41,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:42,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:42,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:21:42,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:42,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:42,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:21:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:42,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:42,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 10:21:42,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:42,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 10:21:42,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:42,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:42,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:42,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:42,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 10:21:42,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 10:21:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084432631] [2020-10-28 10:21:42,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:42,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:21:42,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846671331] [2020-10-28 10:21:42,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:21:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:21:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:21:42,307 INFO L87 Difference]: Start difference. First operand 20330 states and 28563 transitions. Second operand 5 states. [2020-10-28 10:21:42,563 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:21:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:45,904 INFO L93 Difference]: Finished difference Result 46381 states and 65907 transitions. [2020-10-28 10:21:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:21:45,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 295 [2020-10-28 10:21:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:46,017 INFO L225 Difference]: With dead ends: 46381 [2020-10-28 10:21:46,018 INFO L226 Difference]: Without dead ends: 26057 [2020-10-28 10:21:46,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 10:21:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2020-10-28 10:21:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25781. [2020-10-28 10:21:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25781 states. [2020-10-28 10:21:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25781 states to 25781 states and 35759 transitions. [2020-10-28 10:21:46,933 INFO L78 Accepts]: Start accepts. Automaton has 25781 states and 35759 transitions. Word has length 295 [2020-10-28 10:21:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:21:46,934 INFO L481 AbstractCegarLoop]: Abstraction has 25781 states and 35759 transitions. [2020-10-28 10:21:46,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:21:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 25781 states and 35759 transitions. [2020-10-28 10:21:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-10-28 10:21:46,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:21:46,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2020-10-28 10:21:46,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:21:46,986 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:21:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:21:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1678130285, now seen corresponding path program 1 times [2020-10-28 10:21:46,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:21:46,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389218751] [2020-10-28 10:21:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:21:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:50,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:51,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:51,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-28 10:21:51,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:21:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4361 [2020-10-28 10:21:51,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:51,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 10:21:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:21:51,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:51,734 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:21:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:21:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:51,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:51,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:51,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:21:51,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:51,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:21:51,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:51,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:21:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:51,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:21:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:51,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:21:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:51,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:51,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:21:51,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 10:21:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:51,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:21:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:21:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:21:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:21:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:21:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:21:52,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:21:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:21:52,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389218751] [2020-10-28 10:21:52,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:21:52,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:21:52,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712169241] [2020-10-28 10:21:52,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:21:52,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:21:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:21:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:21:52,325 INFO L87 Difference]: Start difference. First operand 25781 states and 35759 transitions. Second operand 7 states. [2020-10-28 10:21:52,959 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:21:53,582 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:21:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:21:58,989 INFO L93 Difference]: Finished difference Result 58038 states and 86786 transitions. [2020-10-28 10:21:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:21:58,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 316 [2020-10-28 10:21:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:21:59,159 INFO L225 Difference]: With dead ends: 58038 [2020-10-28 10:21:59,159 INFO L226 Difference]: Without dead ends: 32263 [2020-10-28 10:21:59,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:21:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32263 states. [2020-10-28 10:22:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32263 to 30591. [2020-10-28 10:22:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30591 states. [2020-10-28 10:22:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30591 states to 30591 states and 41843 transitions. [2020-10-28 10:22:00,682 INFO L78 Accepts]: Start accepts. Automaton has 30591 states and 41843 transitions. Word has length 316 [2020-10-28 10:22:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:00,682 INFO L481 AbstractCegarLoop]: Abstraction has 30591 states and 41843 transitions. [2020-10-28 10:22:00,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:22:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 30591 states and 41843 transitions. [2020-10-28 10:22:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 10:22:00,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:00,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-10-28 10:22:00,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:22:00,747 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash 8711094, now seen corresponding path program 1 times [2020-10-28 10:22:00,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:00,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695379478] [2020-10-28 10:22:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:05,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:22:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 10:22:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 10:22:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:06,115 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:22:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:22:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:06,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:06,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:06,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:22:06,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:22:06,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:06,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:06,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:06,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:06,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:22:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:06,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:06,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 10:22:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:22:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:06,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:06,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:22:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 10:22:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:06,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:06,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:22:06,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:06,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 10:22:06,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:06,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:06,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:22:06,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 170 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 10:22:06,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695379478] [2020-10-28 10:22:06,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:22:06,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:22:06,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321490133] [2020-10-28 10:22:06,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:22:06,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:22:06,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:22:06,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:22:06,901 INFO L87 Difference]: Start difference. First operand 30591 states and 41843 transitions. Second operand 7 states. [2020-10-28 10:22:07,578 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:22:08,436 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:22:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:22:13,043 INFO L93 Difference]: Finished difference Result 71047 states and 109778 transitions. [2020-10-28 10:22:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:22:13,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 319 [2020-10-28 10:22:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:22:13,345 INFO L225 Difference]: With dead ends: 71047 [2020-10-28 10:22:13,345 INFO L226 Difference]: Without dead ends: 41788 [2020-10-28 10:22:13,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:22:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41788 states. [2020-10-28 10:22:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41788 to 39316. [2020-10-28 10:22:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39316 states. [2020-10-28 10:22:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39316 states to 39316 states and 53285 transitions. [2020-10-28 10:22:15,227 INFO L78 Accepts]: Start accepts. Automaton has 39316 states and 53285 transitions. Word has length 319 [2020-10-28 10:22:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:15,228 INFO L481 AbstractCegarLoop]: Abstraction has 39316 states and 53285 transitions. [2020-10-28 10:22:15,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:22:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39316 states and 53285 transitions. [2020-10-28 10:22:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 10:22:15,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:15,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2020-10-28 10:22:15,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:22:15,311 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2046982550, now seen corresponding path program 1 times [2020-10-28 10:22:15,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:15,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043678347] [2020-10-28 10:22:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:15,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:15,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:16,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:20,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 348 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 10:22:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:20,742 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:22:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:22:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:20,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:20,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:20,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:20,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:20,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:20,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:20,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:22:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:20,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:20,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:20,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:22:20,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:20,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:22:20,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:20,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:22:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:22:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:20,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 10:22:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:20,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:21,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:21,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:22:21,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 10:22:21,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:21,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 10:22:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:21,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:21,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:21,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:22:21,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:21,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:22:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 10:22:21,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043678347] [2020-10-28 10:22:21,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:22:21,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:22:21,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574213449] [2020-10-28 10:22:21,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:22:21,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:22:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:22:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:22:21,456 INFO L87 Difference]: Start difference. First operand 39316 states and 53285 transitions. Second operand 7 states. [2020-10-28 10:22:21,745 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:22:22,324 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:22:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:22:25,712 INFO L93 Difference]: Finished difference Result 81887 states and 111526 transitions. [2020-10-28 10:22:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:22:25,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 332 [2020-10-28 10:22:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:22:25,998 INFO L225 Difference]: With dead ends: 81887 [2020-10-28 10:22:25,999 INFO L226 Difference]: Without dead ends: 43915 [2020-10-28 10:22:26,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:22:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43915 states. [2020-10-28 10:22:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43915 to 42320. [2020-10-28 10:22:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42320 states. [2020-10-28 10:22:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42320 states to 42320 states and 57108 transitions. [2020-10-28 10:22:27,210 INFO L78 Accepts]: Start accepts. Automaton has 42320 states and 57108 transitions. Word has length 332 [2020-10-28 10:22:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:27,210 INFO L481 AbstractCegarLoop]: Abstraction has 42320 states and 57108 transitions. [2020-10-28 10:22:27,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:22:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 42320 states and 57108 transitions. [2020-10-28 10:22:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 10:22:27,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:27,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:22:27,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:22:27,296 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 791899574, now seen corresponding path program 1 times [2020-10-28 10:22:27,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:27,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488363983] [2020-10-28 10:22:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:27,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:32,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 348 [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:32,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 10:22:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:22:32,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:32,717 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:22:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:22:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:32,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:32,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:22:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:32,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:32,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:22:32,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:22:32,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:32,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:32,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:22:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:32,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:32,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:32,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:22:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 10:22:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:33,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:33,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:22:33,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 10:22:33,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488363983] [2020-10-28 10:22:33,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:22:33,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:22:33,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680917558] [2020-10-28 10:22:33,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:22:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:22:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:22:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:22:33,481 INFO L87 Difference]: Start difference. First operand 42320 states and 57108 transitions. Second operand 8 states. [2020-10-28 10:22:34,020 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:22:34,531 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:22:35,778 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:22:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:22:41,086 INFO L93 Difference]: Finished difference Result 92408 states and 133093 transitions. [2020-10-28 10:22:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 10:22:41,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-10-28 10:22:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:22:41,277 INFO L225 Difference]: With dead ends: 92408 [2020-10-28 10:22:41,278 INFO L226 Difference]: Without dead ends: 51434 [2020-10-28 10:22:41,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 10:22:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51434 states. [2020-10-28 10:22:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51434 to 48841. [2020-10-28 10:22:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48841 states. [2020-10-28 10:22:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48841 states to 48841 states and 63745 transitions. [2020-10-28 10:22:42,995 INFO L78 Accepts]: Start accepts. Automaton has 48841 states and 63745 transitions. Word has length 332 [2020-10-28 10:22:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:42,995 INFO L481 AbstractCegarLoop]: Abstraction has 48841 states and 63745 transitions. [2020-10-28 10:22:42,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:22:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48841 states and 63745 transitions. [2020-10-28 10:22:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 10:22:43,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:43,080 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:22:43,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:22:43,081 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash -602588792, now seen corresponding path program 1 times [2020-10-28 10:22:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:43,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204552428] [2020-10-28 10:22:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:43,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:43,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:44,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 10:22:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:22:48,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:48,491 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:22:48,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:22:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:22:48,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:48,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:22:48,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:48,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:48,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:48,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:22:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:22:48,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:22:48,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:48,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:48,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:48,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:22:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:22:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:22:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:22:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 10:22:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 10:22:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 10:22:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:48,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:22:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:22:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:22:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:22:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:22:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 10:22:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204552428] [2020-10-28 10:22:49,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:22:49,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:22:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498687348] [2020-10-28 10:22:49,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:22:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:22:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:22:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:22:49,057 INFO L87 Difference]: Start difference. First operand 48841 states and 63745 transitions. Second operand 7 states. [2020-10-28 10:22:49,488 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:22:50,530 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:22:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:22:56,082 INFO L93 Difference]: Finished difference Result 105462 states and 148035 transitions. [2020-10-28 10:22:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:22:56,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 334 [2020-10-28 10:22:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:22:56,376 INFO L225 Difference]: With dead ends: 105462 [2020-10-28 10:22:56,377 INFO L226 Difference]: Without dead ends: 57953 [2020-10-28 10:22:56,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:22:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57953 states. [2020-10-28 10:22:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57953 to 54948. [2020-10-28 10:22:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54948 states. [2020-10-28 10:22:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 71404 transitions. [2020-10-28 10:22:58,192 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 71404 transitions. Word has length 334 [2020-10-28 10:22:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:22:58,192 INFO L481 AbstractCegarLoop]: Abstraction has 54948 states and 71404 transitions. [2020-10-28 10:22:58,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:22:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 71404 transitions. [2020-10-28 10:22:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-28 10:22:58,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:22:58,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-28 10:22:58,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:22:58,278 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:22:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:22:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1509963366, now seen corresponding path program 1 times [2020-10-28 10:22:58,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:22:58,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702441652] [2020-10-28 10:22:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:22:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:22:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:22:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:01,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 364 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:23:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 10:23:03,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:03,766 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:23:03,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:23:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:03,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:23:03,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:03,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:23:03,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:03,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:03,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:23:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:23:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:03,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:03,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:23:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:03,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:23:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:04,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:23:04,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:04,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-28 10:23:04,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:04,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:23:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:23:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:23:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:04,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 10:23:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:04,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:23:04,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:23:04,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-28 10:23:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:04,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:04,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:04,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 10:23:04,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:04,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 198 proven. 93 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 10:23:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702441652] [2020-10-28 10:23:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:23:04,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:23:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217239129] [2020-10-28 10:23:04,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:23:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:23:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:23:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:23:04,462 INFO L87 Difference]: Start difference. First operand 54948 states and 71404 transitions. Second operand 8 states. [2020-10-28 10:23:04,978 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:23:05,916 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:23:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:23:12,556 INFO L93 Difference]: Finished difference Result 114484 states and 161499 transitions. [2020-10-28 10:23:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 10:23:12,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 344 [2020-10-28 10:23:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:23:12,802 INFO L225 Difference]: With dead ends: 114484 [2020-10-28 10:23:12,802 INFO L226 Difference]: Without dead ends: 61537 [2020-10-28 10:23:12,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:23:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61537 states. [2020-10-28 10:23:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61537 to 59899. [2020-10-28 10:23:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59899 states. [2020-10-28 10:23:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59899 states to 59899 states and 77444 transitions. [2020-10-28 10:23:14,554 INFO L78 Accepts]: Start accepts. Automaton has 59899 states and 77444 transitions. Word has length 344 [2020-10-28 10:23:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:23:14,555 INFO L481 AbstractCegarLoop]: Abstraction has 59899 states and 77444 transitions. [2020-10-28 10:23:14,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:23:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 59899 states and 77444 transitions. [2020-10-28 10:23:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-28 10:23:14,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:23:14,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 10:23:14,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:23:14,642 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:23:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:23:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1879196750, now seen corresponding path program 1 times [2020-10-28 10:23:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:23:14,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280659206] [2020-10-28 10:23:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:23:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:14,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 376 [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:19,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:23:19,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-28 10:23:19,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-28 10:23:19,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:20,156 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:23:20,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:23:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:20,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:20,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:23:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:20,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:20,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:20,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 10:23:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:20,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:20,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:23:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 10:23:20,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 10:23:20,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280659206] [2020-10-28 10:23:20,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:23:20,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:23:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593047362] [2020-10-28 10:23:20,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:23:20,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:23:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:23:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:23:20,933 INFO L87 Difference]: Start difference. First operand 59899 states and 77444 transitions. Second operand 5 states. [2020-10-28 10:23:23,348 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 10:23:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:23:24,883 INFO L93 Difference]: Finished difference Result 117298 states and 151522 transitions. [2020-10-28 10:23:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:23:24,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 362 [2020-10-28 10:23:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:23:25,014 INFO L225 Difference]: With dead ends: 117298 [2020-10-28 10:23:25,014 INFO L226 Difference]: Without dead ends: 59823 [2020-10-28 10:23:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 10:23:25,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59823 states. [2020-10-28 10:23:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59823 to 59741. [2020-10-28 10:23:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59741 states. [2020-10-28 10:23:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59741 states to 59741 states and 77173 transitions. [2020-10-28 10:23:26,581 INFO L78 Accepts]: Start accepts. Automaton has 59741 states and 77173 transitions. Word has length 362 [2020-10-28 10:23:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:23:26,581 INFO L481 AbstractCegarLoop]: Abstraction has 59741 states and 77173 transitions. [2020-10-28 10:23:26,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:23:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 59741 states and 77173 transitions. [2020-10-28 10:23:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-28 10:23:26,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:23:26,867 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 10:23:26,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 10:23:26,868 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:23:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:23:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -426737904, now seen corresponding path program 1 times [2020-10-28 10:23:26,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:23:26,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912336477] [2020-10-28 10:23:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:23:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:26,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:31,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:23:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 10:23:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 10:23:31,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,282 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:23:32,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:23:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:32,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:23:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:32,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:23:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:23:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:32,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:23:32,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:23:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:23:32,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 10:23:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 10:23:32,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 10:23:32,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 10:23:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:23:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:23:32,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:23:32,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:23:32,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:23:32,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:23:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:23:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 247 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 10:23:32,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912336477] [2020-10-28 10:23:32,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:23:32,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:23:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917648872] [2020-10-28 10:23:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:23:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:23:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:23:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:23:32,921 INFO L87 Difference]: Start difference. First operand 59741 states and 77173 transitions. Second operand 7 states. [2020-10-28 10:23:33,330 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:23:34,394 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159