/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:32:28,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:32:28,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:32:28,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:32:28,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:32:28,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:32:28,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:32:28,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:32:28,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:32:28,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:32:28,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:32:28,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:32:28,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:32:28,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:32:28,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:32:28,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:32:28,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:32:28,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:32:28,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:32:28,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:32:28,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:32:28,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:32:28,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:32:28,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:32:28,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:32:28,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:32:28,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:32:28,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:32:28,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:32:28,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:32:28,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:32:28,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:32:28,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:32:28,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:32:28,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:32:28,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:32:28,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:32:28,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:32:28,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:32:28,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:32:28,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:32:28,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:32:28,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:32:28,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:32:28,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:32:28,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:32:28,454 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:32:28,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:32:28,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:32:28,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:32:28,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:32:28,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:32:28,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:32:28,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:32:28,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:32:28,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:32:28,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:32:28,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:32:28,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:32:28,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:32:28,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:32:28,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:32:28,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:32:28,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:32:28,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:32:28,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:32:28,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:32:28,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:32:28,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:32:28,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:32:28,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:32:28,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:32:28,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:32:28,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:32:28,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:32:28,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:32:28,970 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:32:28,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label50.c [2020-10-27 18:32:29,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be68cc0a3/f66205b435794849a0dde4bf3f46042f/FLAGf9a142600 [2020-10-27 18:32:30,124 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:32:30,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label50.c [2020-10-27 18:32:30,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be68cc0a3/f66205b435794849a0dde4bf3f46042f/FLAGf9a142600 [2020-10-27 18:32:30,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be68cc0a3/f66205b435794849a0dde4bf3f46042f [2020-10-27 18:32:30,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:32:30,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:32:30,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:32:30,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:32:30,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:32:30,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:32:30" (1/1) ... [2020-10-27 18:32:30,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5540fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:30, skipping insertion in model container [2020-10-27 18:32:30,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:32:30" (1/1) ... [2020-10-27 18:32:30,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:32:30,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:32:31,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:32:31,700 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:32:32,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:32:32,064 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:32:32,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32 WrapperNode [2020-10-27 18:32:32,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:32:32,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:32:32,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:32:32,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:32:32,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... [2020-10-27 18:32:32,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:32:32,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:32:32,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:32:32,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:32:32,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:32:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:32:32,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:32:32,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:32:32,476 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:32:32,476 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:32:32,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:32:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:32:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:32:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:32:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:32:32,479 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:32:32,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:32:32,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:32:32,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:32:32,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:32:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:32:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:32:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:32:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:32:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:32:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:32:38,917 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:32:38,918 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:32:38,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:32:38 BoogieIcfgContainer [2020-10-27 18:32:38,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:32:38,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:32:38,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:32:38,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:32:38,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:32:30" (1/3) ... [2020-10-27 18:32:38,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd1cfb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:32:38, skipping insertion in model container [2020-10-27 18:32:38,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:32:32" (2/3) ... [2020-10-27 18:32:38,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd1cfb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:32:38, skipping insertion in model container [2020-10-27 18:32:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:32:38" (3/3) ... [2020-10-27 18:32:38,937 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label50.c [2020-10-27 18:32:38,953 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:32:38,961 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:32:38,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:32:39,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:32:39,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:32:39,032 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:32:39,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:32:39,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:32:39,032 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:32:39,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:32:39,032 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:32:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-27 18:32:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 18:32:39,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:32:39,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:32:39,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:32:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:32:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -738747081, now seen corresponding path program 1 times [2020-10-27 18:32:39,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:32:39,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023919634] [2020-10-27 18:32:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:32:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:39,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:39,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 18:32:39,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-27 18:32:39,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:32:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:32:39,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:32:39,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:32:40,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:32:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:40,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:40,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:32:40,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:40,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 18:32:40,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:32:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:40,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:32:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:32:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023919634] [2020-10-27 18:32:40,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:32:40,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:32:40,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415887059] [2020-10-27 18:32:40,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:32:40,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:32:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:32:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:32:40,149 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-27 18:32:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:32:50,114 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-27 18:32:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:32:50,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 18:32:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:32:50,158 INFO L225 Difference]: With dead ends: 1208 [2020-10-27 18:32:50,159 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 18:32:50,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:32:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 18:32:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-27 18:32:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 18:32:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-27 18:32:50,354 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 19 [2020-10-27 18:32:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:32:50,355 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-27 18:32:50,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:32:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-27 18:32:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 18:32:50,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:32:50,365 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:32:50,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:32:50,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:32:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:32:50,368 INFO L82 PathProgramCache]: Analyzing trace with hash -980502564, now seen corresponding path program 1 times [2020-10-27 18:32:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:32:50,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224052749] [2020-10-27 18:32:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:32:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:50,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:50,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:51,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:51,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:32:51,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:32:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-27 18:32:51,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:32:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 18:32:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:32:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:32:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:32:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:51,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:51,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:32:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:51,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:32:51,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:51,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:32:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:32:51,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:32:51,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:32:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:32:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:32:52,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:32:52,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:32:52,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:32:52,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 18:32:52,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:32:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:32:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:32:52,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:32:52,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:32:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:32:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224052749] [2020-10-27 18:32:52,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:32:52,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:32:52,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526886833] [2020-10-27 18:32:52,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:32:52,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:32:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:32:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:32:52,119 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 5 states. [2020-10-27 18:33:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:02,161 INFO L93 Difference]: Finished difference Result 2020 states and 2974 transitions. [2020-10-27 18:33:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:02,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-27 18:33:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:02,171 INFO L225 Difference]: With dead ends: 2020 [2020-10-27 18:33:02,171 INFO L226 Difference]: Without dead ends: 1329 [2020-10-27 18:33:02,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2020-10-27 18:33:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1325. [2020-10-27 18:33:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-10-27 18:33:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1880 transitions. [2020-10-27 18:33:02,227 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1880 transitions. Word has length 98 [2020-10-27 18:33:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:02,228 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 1880 transitions. [2020-10-27 18:33:02,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1880 transitions. [2020-10-27 18:33:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 18:33:02,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:02,231 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:33:02,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:33:02,231 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1016892836, now seen corresponding path program 1 times [2020-10-27 18:33:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:02,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750958976] [2020-10-27 18:33:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:02,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:03,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 18:33:03,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 18:33:03,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 18:33:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:33:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:03,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:03,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:03,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:03,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:03,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:03,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:03,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:03,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:03,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 18:33:03,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:03,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 18:33:03,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:03,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:03,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:03,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 18:33:03,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:03,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750958976] [2020-10-27 18:33:03,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:03,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:03,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457408358] [2020-10-27 18:33:03,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:03,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:03,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:03,956 INFO L87 Difference]: Start difference. First operand 1325 states and 1880 transitions. Second operand 5 states. [2020-10-27 18:33:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:12,408 INFO L93 Difference]: Finished difference Result 3276 states and 4851 transitions. [2020-10-27 18:33:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:12,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-27 18:33:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:12,423 INFO L225 Difference]: With dead ends: 3276 [2020-10-27 18:33:12,423 INFO L226 Difference]: Without dead ends: 1957 [2020-10-27 18:33:12,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-10-27 18:33:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1953. [2020-10-27 18:33:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-10-27 18:33:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2620 transitions. [2020-10-27 18:33:12,508 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2620 transitions. Word has length 102 [2020-10-27 18:33:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:12,509 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2620 transitions. [2020-10-27 18:33:12,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2620 transitions. [2020-10-27 18:33:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 18:33:12,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:12,514 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:33:12,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:33:12,515 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1280115362, now seen corresponding path program 1 times [2020-10-27 18:33:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:12,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783693136] [2020-10-27 18:33:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:13,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:13,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:33:13,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:13,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-27 18:33:13,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 18:33:13,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:33:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:14,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:14,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:14,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:14,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:14,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:33:14,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:14,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:14,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:14,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:33:14,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 18:33:14,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 18:33:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:14,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783693136] [2020-10-27 18:33:14,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:14,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:14,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069333511] [2020-10-27 18:33:14,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:14,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:14,396 INFO L87 Difference]: Start difference. First operand 1953 states and 2620 transitions. Second operand 5 states. [2020-10-27 18:33:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:24,752 INFO L93 Difference]: Finished difference Result 4524 states and 6336 transitions. [2020-10-27 18:33:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:24,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-27 18:33:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:24,779 INFO L225 Difference]: With dead ends: 4524 [2020-10-27 18:33:24,784 INFO L226 Difference]: Without dead ends: 2577 [2020-10-27 18:33:24,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2020-10-27 18:33:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2573. [2020-10-27 18:33:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2573 states. [2020-10-27 18:33:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3358 transitions. [2020-10-27 18:33:24,893 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3358 transitions. Word has length 135 [2020-10-27 18:33:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:24,895 INFO L481 AbstractCegarLoop]: Abstraction has 2573 states and 3358 transitions. [2020-10-27 18:33:24,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3358 transitions. [2020-10-27 18:33:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 18:33:24,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:24,903 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:33:24,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:33:24,903 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1306503708, now seen corresponding path program 1 times [2020-10-27 18:33:24,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:24,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673016122] [2020-10-27 18:33:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:26,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:26,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 18:33:26,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 18:33:26,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:33:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:33:26,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:26,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:26,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:26,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:26,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:26,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:33:26,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:26,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:26,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:26,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:26,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:26,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:26,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:33:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 18:33:26,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:33:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:26,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673016122] [2020-10-27 18:33:26,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:26,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:26,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841451485] [2020-10-27 18:33:26,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:26,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:26,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:26,625 INFO L87 Difference]: Start difference. First operand 2573 states and 3358 transitions. Second operand 5 states. [2020-10-27 18:33:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:34,008 INFO L93 Difference]: Finished difference Result 5772 states and 7845 transitions. [2020-10-27 18:33:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:34,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-27 18:33:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:34,036 INFO L225 Difference]: With dead ends: 5772 [2020-10-27 18:33:34,040 INFO L226 Difference]: Without dead ends: 3205 [2020-10-27 18:33:34,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2020-10-27 18:33:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3199. [2020-10-27 18:33:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-27 18:33:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4214 transitions. [2020-10-27 18:33:34,152 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4214 transitions. Word has length 148 [2020-10-27 18:33:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:34,153 INFO L481 AbstractCegarLoop]: Abstraction has 3199 states and 4214 transitions. [2020-10-27 18:33:34,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4214 transitions. [2020-10-27 18:33:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 18:33:34,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:34,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:33:34,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:33:34,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -721191048, now seen corresponding path program 1 times [2020-10-27 18:33:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:34,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022163922] [2020-10-27 18:33:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:35,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:35,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 18:33:35,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:33:35,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-27 18:33:35,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 18:33:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:33:35,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:35,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:35,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:35,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:35,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:35,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:33:35,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:35,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:35,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:33:35,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 18:33:35,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:35,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 18:33:35,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022163922] [2020-10-27 18:33:35,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838595129] [2020-10-27 18:33:35,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:35,923 INFO L87 Difference]: Start difference. First operand 3199 states and 4214 transitions. Second operand 5 states. [2020-10-27 18:33:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:33:48,229 INFO L93 Difference]: Finished difference Result 9512 states and 12808 transitions. [2020-10-27 18:33:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:33:48,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-27 18:33:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:33:48,272 INFO L225 Difference]: With dead ends: 9512 [2020-10-27 18:33:48,273 INFO L226 Difference]: Without dead ends: 6319 [2020-10-27 18:33:48,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:33:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2020-10-27 18:33:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 6302. [2020-10-27 18:33:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6302 states. [2020-10-27 18:33:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 8389 transitions. [2020-10-27 18:33:48,498 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 8389 transitions. Word has length 162 [2020-10-27 18:33:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:33:48,499 INFO L481 AbstractCegarLoop]: Abstraction has 6302 states and 8389 transitions. [2020-10-27 18:33:48,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:33:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 8389 transitions. [2020-10-27 18:33:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 18:33:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:33:48,505 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 18:33:48,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:33:48,505 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:33:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:33:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2036935014, now seen corresponding path program 1 times [2020-10-27 18:33:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:33:48,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430376253] [2020-10-27 18:33:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:33:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:51,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:51,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-27 18:33:51,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:33:51,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2589 [2020-10-27 18:33:51,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:33:51,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 195 [2020-10-27 18:33:51,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:33:51,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:33:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:51,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:51,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:51,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:33:51,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:33:51,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:33:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:51,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:33:51,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:51,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:33:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:33:51,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:33:51,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:33:51,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 18:33:51,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:33:51,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 18:33:51,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:33:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:33:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:33:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-27 18:33:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:33:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:33:51,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430376253] [2020-10-27 18:33:51,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:33:51,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:33:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027543130] [2020-10-27 18:33:51,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:33:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:33:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:33:51,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:33:51,826 INFO L87 Difference]: Start difference. First operand 6302 states and 8389 transitions. Second operand 5 states. [2020-10-27 18:34:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:03,507 INFO L93 Difference]: Finished difference Result 16953 states and 22730 transitions. [2020-10-27 18:34:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:03,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2020-10-27 18:34:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:03,591 INFO L225 Difference]: With dead ends: 16953 [2020-10-27 18:34:03,591 INFO L226 Difference]: Without dead ends: 10657 [2020-10-27 18:34:03,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10657 states. [2020-10-27 18:34:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10657 to 10638. [2020-10-27 18:34:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10638 states. [2020-10-27 18:34:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 14162 transitions. [2020-10-27 18:34:04,034 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 14162 transitions. Word has length 204 [2020-10-27 18:34:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:04,035 INFO L481 AbstractCegarLoop]: Abstraction has 10638 states and 14162 transitions. [2020-10-27 18:34:04,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 14162 transitions. [2020-10-27 18:34:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 18:34:04,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:04,042 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:04,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:34:04,043 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash -413733450, now seen corresponding path program 1 times [2020-10-27 18:34:04,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:04,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41439800] [2020-10-27 18:34:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 18:34:08,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:08,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4310 [2020-10-27 18:34:08,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 204 [2020-10-27 18:34:08,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:34:08,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:08,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:34:08,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-27 18:34:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:08,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:34:08,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:08,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 18:34:08,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:34:08,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 18:34:08,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41439800] [2020-10-27 18:34:08,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:08,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773744165] [2020-10-27 18:34:08,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:08,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:08,891 INFO L87 Difference]: Start difference. First operand 10638 states and 14162 transitions. Second operand 5 states. [2020-10-27 18:34:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:21,306 INFO L93 Difference]: Finished difference Result 28714 states and 39228 transitions. [2020-10-27 18:34:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:21,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-10-27 18:34:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:21,396 INFO L225 Difference]: With dead ends: 28714 [2020-10-27 18:34:21,397 INFO L226 Difference]: Without dead ends: 18082 [2020-10-27 18:34:21,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2020-10-27 18:34:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 14394. [2020-10-27 18:34:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14394 states. [2020-10-27 18:34:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14394 states to 14394 states and 19100 transitions. [2020-10-27 18:34:21,894 INFO L78 Accepts]: Start accepts. Automaton has 14394 states and 19100 transitions. Word has length 211 [2020-10-27 18:34:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:21,895 INFO L481 AbstractCegarLoop]: Abstraction has 14394 states and 19100 transitions. [2020-10-27 18:34:21,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14394 states and 19100 transitions. [2020-10-27 18:34:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-27 18:34:21,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:21,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:21,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:34:21,904 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1125016070, now seen corresponding path program 1 times [2020-10-27 18:34:21,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:21,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648294393] [2020-10-27 18:34:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:22,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:26,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:26,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-27 18:34:26,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:34:26,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4263 [2020-10-27 18:34:26,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-27 18:34:26,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:34:26,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:26,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:26,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:26,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:26,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:26,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:26,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:34:26,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:26,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:26,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:26,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:26,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 18:34:26,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 18:34:26,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:26,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:26,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 18:34:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:26,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:26,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:26,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:34:26,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:26,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 18:34:26,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 18:34:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 18:34:26,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648294393] [2020-10-27 18:34:26,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:26,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306445367] [2020-10-27 18:34:26,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:26,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:26,989 INFO L87 Difference]: Start difference. First operand 14394 states and 19100 transitions. Second operand 5 states. [2020-10-27 18:34:27,146 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 18:34:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:36,549 INFO L93 Difference]: Finished difference Result 32830 states and 43835 transitions. [2020-10-27 18:34:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:36,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-10-27 18:34:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:36,641 INFO L225 Difference]: With dead ends: 32830 [2020-10-27 18:34:36,641 INFO L226 Difference]: Without dead ends: 18442 [2020-10-27 18:34:36,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18442 states. [2020-10-27 18:34:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18442 to 18113. [2020-10-27 18:34:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18113 states. [2020-10-27 18:34:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18113 states to 18113 states and 24164 transitions. [2020-10-27 18:34:37,210 INFO L78 Accepts]: Start accepts. Automaton has 18113 states and 24164 transitions. Word has length 241 [2020-10-27 18:34:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:37,210 INFO L481 AbstractCegarLoop]: Abstraction has 18113 states and 24164 transitions. [2020-10-27 18:34:37,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18113 states and 24164 transitions. [2020-10-27 18:34:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-27 18:34:37,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:37,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:34:37,223 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2072344090, now seen corresponding path program 1 times [2020-10-27 18:34:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:37,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490127381] [2020-10-27 18:34:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:40,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:40,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 18:34:40,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:34:40,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2707 [2020-10-27 18:34:40,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 261 [2020-10-27 18:34:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 18:34:40,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:40,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:40,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:40,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:40,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:34:40,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:40,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:34:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:40,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:40,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:40,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-27 18:34:40,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 18:34:40,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 246 [2020-10-27 18:34:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:34:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490127381] [2020-10-27 18:34:40,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:34:40,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:34:40,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807442973] [2020-10-27 18:34:40,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:34:40,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:34:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:34:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:34:40,950 INFO L87 Difference]: Start difference. First operand 18113 states and 24164 transitions. Second operand 5 states. [2020-10-27 18:34:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:34:53,033 INFO L93 Difference]: Finished difference Result 40859 states and 55534 transitions. [2020-10-27 18:34:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:34:53,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2020-10-27 18:34:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:34:53,143 INFO L225 Difference]: With dead ends: 40859 [2020-10-27 18:34:53,144 INFO L226 Difference]: Without dead ends: 22752 [2020-10-27 18:34:53,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:34:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22752 states. [2020-10-27 18:34:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22752 to 22748. [2020-10-27 18:34:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22748 states. [2020-10-27 18:34:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22748 states to 22748 states and 29470 transitions. [2020-10-27 18:34:53,752 INFO L78 Accepts]: Start accepts. Automaton has 22748 states and 29470 transitions. Word has length 270 [2020-10-27 18:34:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:34:53,753 INFO L481 AbstractCegarLoop]: Abstraction has 22748 states and 29470 transitions. [2020-10-27 18:34:53,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:34:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 22748 states and 29470 transitions. [2020-10-27 18:34:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-27 18:34:53,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:34:53,769 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:34:53,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:34:53,769 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:34:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:34:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash 966917823, now seen corresponding path program 1 times [2020-10-27 18:34:53,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:34:53,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176352667] [2020-10-27 18:34:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:34:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:54,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:58,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:58,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-27 18:34:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:34:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 18:34:58,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 263 [2020-10-27 18:34:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 18:34:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:59,084 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:34:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:34:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:59,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:34:59,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:59,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:34:59,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:59,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:34:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:59,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:34:59,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:59,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:34:59,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:59,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:34:59,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:34:59,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:34:59,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:34:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 18:34:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:34:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 18:34:59,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:59,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:34:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-27 18:34:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:34:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:34:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-10-27 18:34:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:34:59,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:34:59,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:34:59,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:34:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 18:34:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 18:35:00,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176352667] [2020-10-27 18:35:00,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:00,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 18:35:00,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705019893] [2020-10-27 18:35:00,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:35:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:35:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:35:00,098 INFO L87 Difference]: Start difference. First operand 22748 states and 29470 transitions. Second operand 8 states. [2020-10-27 18:35:00,392 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 18:35:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:13,745 INFO L93 Difference]: Finished difference Result 45998 states and 60797 transitions. [2020-10-27 18:35:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 18:35:13,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 377 [2020-10-27 18:35:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:13,862 INFO L225 Difference]: With dead ends: 45998 [2020-10-27 18:35:13,863 INFO L226 Difference]: Without dead ends: 23256 [2020-10-27 18:35:13,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 18:35:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23256 states. [2020-10-27 18:35:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23256 to 22788. [2020-10-27 18:35:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22788 states. [2020-10-27 18:35:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22788 states to 22788 states and 29597 transitions. [2020-10-27 18:35:14,514 INFO L78 Accepts]: Start accepts. Automaton has 22788 states and 29597 transitions. Word has length 377 [2020-10-27 18:35:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:14,514 INFO L481 AbstractCegarLoop]: Abstraction has 22788 states and 29597 transitions. [2020-10-27 18:35:14,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:35:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 22788 states and 29597 transitions. [2020-10-27 18:35:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-10-27 18:35:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:14,530 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:14,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:35:14,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash 656203070, now seen corresponding path program 1 times [2020-10-27 18:35:14,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:14,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995442324] [2020-10-27 18:35:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:14,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:15,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:19,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:19,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:35:19,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:19,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:19,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:19,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:19,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:19,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:19,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:19,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:19,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:19,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:19,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:35:19,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 18:35:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-27 18:35:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 18:35:20,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:20,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 18:35:20,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 18:35:20,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-10-27 18:35:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:20,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:20,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 18:35:20,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:20,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:35:20,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:20,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-27 18:35:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 129 proven. 120 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-27 18:35:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995442324] [2020-10-27 18:35:20,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:20,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100204575] [2020-10-27 18:35:20,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:20,649 INFO L87 Difference]: Start difference. First operand 22788 states and 29597 transitions. Second operand 7 states. [2020-10-27 18:35:20,823 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:35:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:37,125 INFO L93 Difference]: Finished difference Result 48379 states and 62825 transitions. [2020-10-27 18:35:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:35:37,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 386 [2020-10-27 18:35:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:37,219 INFO L225 Difference]: With dead ends: 48379 [2020-10-27 18:35:37,219 INFO L226 Difference]: Without dead ends: 22166 [2020-10-27 18:35:37,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22166 states. [2020-10-27 18:35:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22166 to 16895. [2020-10-27 18:35:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16895 states. [2020-10-27 18:35:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16895 states to 16895 states and 19779 transitions. [2020-10-27 18:35:37,974 INFO L78 Accepts]: Start accepts. Automaton has 16895 states and 19779 transitions. Word has length 386 [2020-10-27 18:35:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:37,981 INFO L481 AbstractCegarLoop]: Abstraction has 16895 states and 19779 transitions. [2020-10-27 18:35:37,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 16895 states and 19779 transitions. [2020-10-27 18:35:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-27 18:35:37,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:37,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:37,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 18:35:37,998 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1924542005, now seen corresponding path program 1 times [2020-10-27 18:35:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:38,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355276359] [2020-10-27 18:35:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:38,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:43,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 292 [2020-10-27 18:35:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:35:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:43,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:35:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:35:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:35:43,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:43,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:35:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:43,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:35:43,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:35:43,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:35:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:43,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 18:35:43,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:43,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 18:35:43,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:43,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:35:43,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:35:43,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:35:43,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-10-27 18:35:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:43,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 18:35:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:35:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 18:35:44,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355276359] [2020-10-27 18:35:44,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:35:44,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:35:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7724222] [2020-10-27 18:35:44,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:35:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:35:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:35:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:35:44,140 INFO L87 Difference]: Start difference. First operand 16895 states and 19779 transitions. Second operand 7 states. [2020-10-27 18:35:46,067 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:35:47,426 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 18:35:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:35:58,697 INFO L93 Difference]: Finished difference Result 39106 states and 46014 transitions. [2020-10-27 18:35:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:35:58,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 405 [2020-10-27 18:35:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:35:58,789 INFO L225 Difference]: With dead ends: 39106 [2020-10-27 18:35:58,790 INFO L226 Difference]: Without dead ends: 21875 [2020-10-27 18:35:58,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:35:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21875 states. [2020-10-27 18:35:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21875 to 20025. [2020-10-27 18:35:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20025 states. [2020-10-27 18:35:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20025 states to 20025 states and 23073 transitions. [2020-10-27 18:35:59,362 INFO L78 Accepts]: Start accepts. Automaton has 20025 states and 23073 transitions. Word has length 405 [2020-10-27 18:35:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:35:59,363 INFO L481 AbstractCegarLoop]: Abstraction has 20025 states and 23073 transitions. [2020-10-27 18:35:59,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:35:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20025 states and 23073 transitions. [2020-10-27 18:35:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-10-27 18:35:59,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:35:59,375 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:35:59,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 18:35:59,376 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:35:59,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:35:59,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1688772074, now seen corresponding path program 1 times [2020-10-27 18:35:59,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:35:59,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162426503] [2020-10-27 18:35:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:35:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:35:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:59,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:35:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 452 [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:04,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:04,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 323 [2020-10-27 18:36:04,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 18:36:04,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:04,746 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-27 18:36:04,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:36:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:04,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:04,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:36:04,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:04,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:36:04,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:04,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:04,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:36:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:04,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 18:36:04,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:04,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 18:36:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:36:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:36:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:04,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-27 18:36:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:05,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 18:36:05,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2020-10-27 18:36:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:36:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:36:05,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:36:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:36:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 18:36:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:36:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 18:36:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162426503] [2020-10-27 18:36:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:36:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:36:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754900380] [2020-10-27 18:36:05,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:36:05,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:36:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:36:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:36:05,552 INFO L87 Difference]: Start difference. First operand 20025 states and 23073 transitions. Second operand 7 states. [2020-10-27 18:36:05,702 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63