/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:19:35,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:19:35,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:19:35,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:19:35,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:19:35,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:19:35,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:19:35,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:19:35,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:19:35,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:19:35,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:19:35,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:19:35,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:19:35,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:19:35,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:19:35,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:19:35,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:19:35,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:19:35,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:19:35,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:19:35,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:19:35,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:19:35,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:19:35,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:19:35,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:19:35,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:19:35,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:19:35,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:19:35,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:19:35,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:19:35,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:19:35,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:19:35,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:19:35,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:19:35,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:19:35,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:19:35,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:19:35,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:19:35,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:19:35,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:19:35,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:19:35,489 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 [2020-10-29 08:19:35,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:19:35,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:19:35,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:19:35,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:19:35,525 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:19:35,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:19:35,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:19:35,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:19:35,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:19:35,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:19:35,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:19:35,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:19:35,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:19:35,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:19:35,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:19:35,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:19:35,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:19:35,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:19:35,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:19:35,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:19:35,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:19:35,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:19:35,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:19:35,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:19:35,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:19:35,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:19:35,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:19:35,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:19:35,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:19:35,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:19:36,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:19:36,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:19:36,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:19:36,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:19:36,124 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:19:36,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label35.c [2020-10-29 08:19:36,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca257bf8/a3866bb3d05f4853a687990e29b7241d/FLAG2c68deeba [2020-10-29 08:19:37,191 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:19:37,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label35.c [2020-10-29 08:19:37,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca257bf8/a3866bb3d05f4853a687990e29b7241d/FLAG2c68deeba [2020-10-29 08:19:37,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ca257bf8/a3866bb3d05f4853a687990e29b7241d [2020-10-29 08:19:37,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:19:37,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:19:37,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:19:37,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:19:37,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:19:37,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:19:37" (1/1) ... [2020-10-29 08:19:37,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2ecc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:37, skipping insertion in model container [2020-10-29 08:19:37,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:19:37" (1/1) ... [2020-10-29 08:19:37,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:19:37,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:19:38,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:19:38,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:19:39,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:19:39,377 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:19:39,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39 WrapperNode [2020-10-29 08:19:39,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:19:39,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:19:39,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:19:39,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:19:39,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (1/1) ... [2020-10-29 08:19:39,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:19:39,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:19:39,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:19:39,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:19:39,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (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 [2020-10-29 08:19:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:19:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:19:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:19:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:19:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:19:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:19:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:19:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:19:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:19:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:19:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:19:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:19:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:19:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:19:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:19:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:19:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:19:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:19:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:19:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:19:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:19:48,115 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:19:48,116 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:19:48,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:19:48 BoogieIcfgContainer [2020-10-29 08:19:48,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:19:48,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:19:48,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:19:48,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:19:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:19:37" (1/3) ... [2020-10-29 08:19:48,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310d41e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:19:48, skipping insertion in model container [2020-10-29 08:19:48,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:19:39" (2/3) ... [2020-10-29 08:19:48,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310d41e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:19:48, skipping insertion in model container [2020-10-29 08:19:48,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:19:48" (3/3) ... [2020-10-29 08:19:48,140 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label35.c [2020-10-29 08:19:48,158 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:19:48,168 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:19:48,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:19:48,255 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:19:48,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:19:48,255 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:19:48,255 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:19:48,255 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:19:48,256 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:19:48,256 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:19:48,256 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:19:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:19:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 08:19:48,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:19:48,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:19:48,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:19:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:19:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash 872651642, now seen corresponding path program 1 times [2020-10-29 08:19:48,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:19:48,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508920054] [2020-10-29 08:19:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:19:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:48,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:49,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:49,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 08:19:49,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:49,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-29 08:19:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:49,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:19:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:19:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 08:19:49,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 08:19:49,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:19:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:49,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:49,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:19:49,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:49,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-29 08:19:49,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:49,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:49,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:19:49,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:19:49,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:19:49,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:19:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:19:49,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508920054] [2020-10-29 08:19:49,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:19:49,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:19:49,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278066769] [2020-10-29 08:19:49,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:19:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:19:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:19:49,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:19:49,574 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:20:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:20:07,404 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-29 08:20:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:20:07,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-29 08:20:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:20:07,448 INFO L225 Difference]: With dead ends: 1694 [2020-10-29 08:20:07,448 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 08:20:07,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:20:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 08:20:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-29 08:20:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-29 08:20:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-29 08:20:07,618 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 14 [2020-10-29 08:20:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:20:07,619 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-29 08:20:07,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:20:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-29 08:20:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 08:20:07,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:20:07,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:20:07,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:20:07,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:20:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:20:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1323374970, now seen corresponding path program 1 times [2020-10-29 08:20:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:20:07,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795725297] [2020-10-29 08:20:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:20:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:07,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:08,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:09,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:09,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 08:20:09,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:20:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-29 08:20:09,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:09,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:20:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:20:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:20:09,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:20:09,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:20:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:09,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:09,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:20:09,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 08:20:09,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:09,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:20:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:20:09,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 08:20:09,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:20:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:09,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:09,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:20:09,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:09,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 08:20:09,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:09,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:09,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:20:09,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:20:09,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:20:09,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:20:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795725297] [2020-10-29 08:20:10,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:20:10,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:20:10,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976833075] [2020-10-29 08:20:10,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:20:10,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:20:10,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:20:10,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:20:10,009 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-29 08:20:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:20:24,711 INFO L93 Difference]: Finished difference Result 2448 states and 3891 transitions. [2020-10-29 08:20:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:20:24,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-29 08:20:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:20:24,726 INFO L225 Difference]: With dead ends: 2448 [2020-10-29 08:20:24,729 INFO L226 Difference]: Without dead ends: 1462 [2020-10-29 08:20:24,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:20:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-10-29 08:20:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1433. [2020-10-29 08:20:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-29 08:20:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-29 08:20:24,791 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 85 [2020-10-29 08:20:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:20:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-29 08:20:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:20:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-29 08:20:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 08:20:24,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:20:24,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:20:24,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:20:24,796 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:20:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:20:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1890169273, now seen corresponding path program 1 times [2020-10-29 08:20:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:20:24,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168799463] [2020-10-29 08:20:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:20:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:25,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:25,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 08:20:25,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:25,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-29 08:20:25,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:25,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:20:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:20:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 08:20:25,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:25,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:20:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:25,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:25,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:25,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:20:25,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:25,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 08:20:25,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:25,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:25,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:20:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:20:25,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:25,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:20:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:25,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:25,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:20:25,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:25,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-29 08:20:25,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:25,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:20:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:20:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:20:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168799463] [2020-10-29 08:20:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:20:25,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:20:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341443490] [2020-10-29 08:20:25,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:20:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:20:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:20:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:20:25,473 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 5 states. [2020-10-29 08:20:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:20:38,713 INFO L93 Difference]: Finished difference Result 3331 states and 4572 transitions. [2020-10-29 08:20:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:20:38,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-29 08:20:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:20:38,726 INFO L225 Difference]: With dead ends: 3331 [2020-10-29 08:20:38,726 INFO L226 Difference]: Without dead ends: 1891 [2020-10-29 08:20:38,730 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 [2020-10-29 08:20:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-10-29 08:20:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1882. [2020-10-29 08:20:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-10-29 08:20:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2300 transitions. [2020-10-29 08:20:38,790 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2300 transitions. Word has length 88 [2020-10-29 08:20:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:20:38,790 INFO L481 AbstractCegarLoop]: Abstraction has 1882 states and 2300 transitions. [2020-10-29 08:20:38,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:20:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2300 transitions. [2020-10-29 08:20:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-29 08:20:38,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:20:38,795 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:20:38,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:20:38,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:20:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:20:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1418878538, now seen corresponding path program 1 times [2020-10-29 08:20:38,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:20:38,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011283117] [2020-10-29 08:20:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:20:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:40,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:40,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-29 08:20:40,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:20:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:20:40,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:20:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:40,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:40,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:20:40,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:40,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:20:40,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:40,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:20:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:20:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:40,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:20:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:40,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:40,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:20:40,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:40,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 08:20:40,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:40,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:20:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:20:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:20:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:20:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:40,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:40,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:20:40,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:40,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-29 08:20:40,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:40,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:20:40,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:20:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:20:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:20:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:20:41,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011283117] [2020-10-29 08:20:41,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:20:41,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:20:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281099275] [2020-10-29 08:20:41,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:20:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:20:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:20:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:20:41,066 INFO L87 Difference]: Start difference. First operand 1882 states and 2300 transitions. Second operand 8 states. [2020-10-29 08:20:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:20:54,153 INFO L93 Difference]: Finished difference Result 4249 states and 5492 transitions. [2020-10-29 08:20:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:20:54,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 174 [2020-10-29 08:20:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:20:54,177 INFO L225 Difference]: With dead ends: 4249 [2020-10-29 08:20:54,177 INFO L226 Difference]: Without dead ends: 2806 [2020-10-29 08:20:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:20:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-10-29 08:20:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2790. [2020-10-29 08:20:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2020-10-29 08:20:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3417 transitions. [2020-10-29 08:20:54,295 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3417 transitions. Word has length 174 [2020-10-29 08:20:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:20:54,297 INFO L481 AbstractCegarLoop]: Abstraction has 2790 states and 3417 transitions. [2020-10-29 08:20:54,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:20:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3417 transitions. [2020-10-29 08:20:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-29 08:20:54,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:20:54,306 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:20:54,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:20:54,306 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:20:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:20:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1996862802, now seen corresponding path program 1 times [2020-10-29 08:20:54,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:20:54,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677959661] [2020-10-29 08:20:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:20:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:54,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:55,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:58,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:58,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-29 08:20:58,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:20:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4431 [2020-10-29 08:20:58,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:58,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:20:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:20:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:20:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:20:59,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:20:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:59,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:59,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:59,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:20:59,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 08:20:59,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:59,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:20:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:20:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:20:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:59,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:20:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:59,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:59,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:20:59,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:59,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 08:20:59,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:59,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:20:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:20:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:20:59,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:20:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:20:59,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:20:59,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:20:59,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:20:59,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:20:59,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-29 08:20:59,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:20:59,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:20:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:20:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:20:59,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677959661] [2020-10-29 08:20:59,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:20:59,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:20:59,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497638328] [2020-10-29 08:20:59,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:20:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:20:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:20:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:20:59,951 INFO L87 Difference]: Start difference. First operand 2790 states and 3417 transitions. Second operand 10 states. [2020-10-29 08:21:00,158 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-29 08:21:00,919 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-29 08:21:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:21:27,920 INFO L93 Difference]: Finished difference Result 5722 states and 7121 transitions. [2020-10-29 08:21:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 08:21:27,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2020-10-29 08:21:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:21:27,944 INFO L225 Difference]: With dead ends: 5722 [2020-10-29 08:21:27,944 INFO L226 Difference]: Without dead ends: 3371 [2020-10-29 08:21:27,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-29 08:21:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2020-10-29 08:21:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3287. [2020-10-29 08:21:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3287 states. [2020-10-29 08:21:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 3974 transitions. [2020-10-29 08:21:28,086 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 3974 transitions. Word has length 176 [2020-10-29 08:21:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:21:28,088 INFO L481 AbstractCegarLoop]: Abstraction has 3287 states and 3974 transitions. [2020-10-29 08:21:28,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:21:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 3974 transitions. [2020-10-29 08:21:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-29 08:21:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:21:28,091 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:21:28,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:21:28,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:21:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:21:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 540886792, now seen corresponding path program 1 times [2020-10-29 08:21:28,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:21:28,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069404465] [2020-10-29 08:21:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:21:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:28,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:33,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:33,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-29 08:21:33,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:21:33,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4935 [2020-10-29 08:21:33,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:33,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:33,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:21:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:21:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 08:21:33,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:33,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:21:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:33,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:33,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:33,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:21:33,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:33,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:21:33,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:33,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:21:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:21:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:21:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:33,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:21:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:33,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:33,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:21:33,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:33,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 08:21:33,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:33,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:33,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:21:33,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:21:33,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:21:33,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:21:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:33,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:21:33,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:21:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-29 08:21:33,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:33,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:21:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:21:33,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:21:33,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:21:33,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069404465] [2020-10-29 08:21:33,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:21:33,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:21:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275094755] [2020-10-29 08:21:33,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:21:33,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:21:33,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:21:33,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:21:33,826 INFO L87 Difference]: Start difference. First operand 3287 states and 3974 transitions. Second operand 5 states. [2020-10-29 08:21:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:21:49,912 INFO L93 Difference]: Finished difference Result 6138 states and 7802 transitions. [2020-10-29 08:21:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:21:49,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-29 08:21:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:21:49,931 INFO L225 Difference]: With dead ends: 6138 [2020-10-29 08:21:49,932 INFO L226 Difference]: Without dead ends: 3727 [2020-10-29 08:21:49,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:21:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2020-10-29 08:21:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3720. [2020-10-29 08:21:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-10-29 08:21:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 4552 transitions. [2020-10-29 08:21:50,037 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 4552 transitions. Word has length 187 [2020-10-29 08:21:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:21:50,037 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 4552 transitions. [2020-10-29 08:21:50,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:21:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 4552 transitions. [2020-10-29 08:21:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-29 08:21:50,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:21:50,042 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:21:50,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:21:50,043 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:21:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:21:50,044 INFO L82 PathProgramCache]: Analyzing trace with hash -477093971, now seen corresponding path program 1 times [2020-10-29 08:21:50,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:21:50,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006289978] [2020-10-29 08:21:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:21:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:50,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:50,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:51,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:55,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:55,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-29 08:21:55,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:21:55,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 08:21:55,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:55,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:55,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:21:55,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:21:55,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-29 08:21:55,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:21:55,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:21:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:55,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:55,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:55,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:21:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:21:55,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:21:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:21:55,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:21:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:55,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:55,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:21:55,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:55,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-29 08:21:55,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:55,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:55,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:21:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:21:55,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:21:55,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:55,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:21:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:55,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:55,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:21:55,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:55,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-29 08:21:55,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:55,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:55,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:21:55,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:21:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:21:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:21:56,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-29 08:21:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:21:56,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:21:56,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:21:56,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:21:56,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:21:56,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 08:21:56,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:21:56,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:21:56,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:21:56,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:21:56,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:21:56,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:21:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 94 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:21:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006289978] [2020-10-29 08:21:56,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:21:56,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:21:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515177024] [2020-10-29 08:21:56,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:21:56,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:21:56,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:21:56,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:21:56,232 INFO L87 Difference]: Start difference. First operand 3720 states and 4552 transitions. Second operand 10 states. [2020-10-29 08:21:56,464 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-29 08:22:01,716 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-29 08:22:04,026 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:22:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:22:15,777 INFO L93 Difference]: Finished difference Result 9448 states and 11996 transitions. [2020-10-29 08:22:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 08:22:15,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 254 [2020-10-29 08:22:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:22:15,815 INFO L225 Difference]: With dead ends: 9448 [2020-10-29 08:22:15,816 INFO L226 Difference]: Without dead ends: 5721 [2020-10-29 08:22:15,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-29 08:22:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2020-10-29 08:22:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 5570. [2020-10-29 08:22:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5570 states. [2020-10-29 08:22:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 6604 transitions. [2020-10-29 08:22:16,008 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 6604 transitions. Word has length 254 [2020-10-29 08:22:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:22:16,008 INFO L481 AbstractCegarLoop]: Abstraction has 5570 states and 6604 transitions. [2020-10-29 08:22:16,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:22:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 6604 transitions. [2020-10-29 08:22:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-29 08:22:16,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:22:16,014 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-29 08:22:16,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:22:16,014 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:22:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:22:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1422484012, now seen corresponding path program 1 times [2020-10-29 08:22:16,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:22:16,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96194814] [2020-10-29 08:22:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:22:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:16,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:17,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:19,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:20,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:20,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-29 08:22:20,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:22:20,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3942 [2020-10-29 08:22:20,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:20,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:22:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:22:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 265 [2020-10-29 08:22:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:22:20,283 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:22:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:22:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:20,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:20,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:22:20,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:20,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:22:20,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:20,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:22:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:22:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:22:20,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:20,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:22:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:20,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:20,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:22:20,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-29 08:22:20,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:20,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:22:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:22:20,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:22:20,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:20,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:22:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:22:20,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 08:22:21,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:21,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:21,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:22:21,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:22:21,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:22:21,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:22:21,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:22:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:21,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:21,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:22:21,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:21,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-29 08:22:21,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:21,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:22:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:22:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:22:21,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:22:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 143 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 08:22:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96194814] [2020-10-29 08:22:21,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:22:21,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:22:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855893924] [2020-10-29 08:22:21,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:22:21,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:22:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:22:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:22:21,517 INFO L87 Difference]: Start difference. First operand 5570 states and 6604 transitions. Second operand 9 states. [2020-10-29 08:22:21,704 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:22:22,600 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:22:27,785 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:22:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:22:41,795 INFO L93 Difference]: Finished difference Result 13027 states and 16065 transitions. [2020-10-29 08:22:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 08:22:41,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 258 [2020-10-29 08:22:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:22:41,848 INFO L225 Difference]: With dead ends: 13027 [2020-10-29 08:22:41,849 INFO L226 Difference]: Without dead ends: 7893 [2020-10-29 08:22:41,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 08:22:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2020-10-29 08:22:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 7782. [2020-10-29 08:22:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7782 states. [2020-10-29 08:22:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7782 states to 7782 states and 9060 transitions. [2020-10-29 08:22:42,097 INFO L78 Accepts]: Start accepts. Automaton has 7782 states and 9060 transitions. Word has length 258 [2020-10-29 08:22:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:22:42,098 INFO L481 AbstractCegarLoop]: Abstraction has 7782 states and 9060 transitions. [2020-10-29 08:22:42,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 08:22:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7782 states and 9060 transitions. [2020-10-29 08:22:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-29 08:22:42,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:22:42,104 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-29 08:22:42,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:22:42,104 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:22:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:22:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash 815701965, now seen corresponding path program 1 times [2020-10-29 08:22:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:22:42,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925463426] [2020-10-29 08:22:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:22:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:42,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:42,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:42,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:47,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:47,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-29 08:22:47,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:22:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4838 [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:22:47,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:47,243 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:22:47,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:22:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:47,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:47,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:22:47,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:47,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:22:47,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:47,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:22:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:22:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:22:47,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:47,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:22:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:47,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:47,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:47,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:22:47,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-29 08:22:47,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:47,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:22:47,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:22:47,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:22:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:22:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:22:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:47,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:47,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:22:47,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:47,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-29 08:22:47,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:47,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:22:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:22:47,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:22:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:48,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:22:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:22:48,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:22:48,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:22:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:22:48,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:22:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:22:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:22:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925463426] [2020-10-29 08:22:48,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:22:48,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:22:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468659314] [2020-10-29 08:22:48,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:22:48,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:22:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:22:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:22:48,235 INFO L87 Difference]: Start difference. First operand 7782 states and 9060 transitions. Second operand 7 states. [2020-10-29 08:22:55,393 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 08:23:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:23:08,402 INFO L93 Difference]: Finished difference Result 16164 states and 18935 transitions. [2020-10-29 08:23:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:23:08,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 281 [2020-10-29 08:23:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:23:08,435 INFO L225 Difference]: With dead ends: 16164 [2020-10-29 08:23:08,436 INFO L226 Difference]: Without dead ends: 9258 [2020-10-29 08:23:08,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:23:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9258 states. [2020-10-29 08:23:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9258 to 9143. [2020-10-29 08:23:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9143 states. [2020-10-29 08:23:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9143 states to 9143 states and 10552 transitions. [2020-10-29 08:23:08,658 INFO L78 Accepts]: Start accepts. Automaton has 9143 states and 10552 transitions. Word has length 281 [2020-10-29 08:23:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:23:08,659 INFO L481 AbstractCegarLoop]: Abstraction has 9143 states and 10552 transitions. [2020-10-29 08:23:08,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:23:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 9143 states and 10552 transitions. [2020-10-29 08:23:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-29 08:23:08,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:23:08,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:23:08,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:23:08,669 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:23:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:23:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash 801706341, now seen corresponding path program 1 times [2020-10-29 08:23:08,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:23:08,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953687884] [2020-10-29 08:23:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:23:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:09,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:13,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:13,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-29 08:23:13,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 08:23:13,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:13,964 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:23:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:23:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:13,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:23:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:13,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:23:13,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:14,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:23:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:14,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:14,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:23:14,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:23:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:14,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:23:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:14,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:14,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:23:14,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 08:23:14,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:14,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:23:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:23:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:23:14,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:23:14,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:23:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:14,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 08:23:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:14,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2020-10-29 08:23:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:23:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:23:14,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:23:14,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:23:14,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:23:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:23:14,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:23:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 204 proven. 70 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-29 08:23:14,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953687884] [2020-10-29 08:23:14,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:23:14,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:23:14,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438273830] [2020-10-29 08:23:14,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:23:14,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:23:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:23:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:23:14,694 INFO L87 Difference]: Start difference. First operand 9143 states and 10552 transitions. Second operand 7 states. [2020-10-29 08:23:15,603 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68