/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:13:39,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:13:39,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:13:39,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:13:39,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:13:39,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:13:39,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:13:39,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:13:39,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:13:39,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:13:39,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:13:39,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:13:39,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:13:39,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:13:39,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:13:39,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:13:39,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:13:39,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:13:39,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:13:39,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:13:39,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:13:39,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:13:39,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:13:39,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:13:39,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:13:39,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:13:39,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:13:39,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:13:39,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:13:39,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:13:39,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:13:39,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:13:39,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:13:39,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:13:39,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:13:39,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:13:39,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:13:39,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:13:39,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:13:39,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:13:39,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:13:39,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:13:39,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:13:39,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:13:39,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:13:39,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:13:39,365 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:13:39,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:13:39,365 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:13:39,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:13:39,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:13:39,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:13:39,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:13:39,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:13:39,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:13:39,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:13:39,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:13:39,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:13:39,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:13:39,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:13:39,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:13:39,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:13:39,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:13:39,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:13:39,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:13:39,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:13:39,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:13:39,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:13:39,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:13:39,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:13:39,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:13:39,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:13:39,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:13:39,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:13:39,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:13:39,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:13:39,860 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:13:39,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label15.c [2020-10-28 10:13:39,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a76d9802/8b03f246a71b49e9a2ff0c9733747abf/FLAGc4dcf2173 [2020-10-28 10:13:40,896 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:13:40,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label15.c [2020-10-28 10:13:40,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a76d9802/8b03f246a71b49e9a2ff0c9733747abf/FLAGc4dcf2173 [2020-10-28 10:13:41,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a76d9802/8b03f246a71b49e9a2ff0c9733747abf [2020-10-28 10:13:41,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:13:41,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:13:41,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:13:41,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:13:41,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:13:41,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:13:41" (1/1) ... [2020-10-28 10:13:41,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43102782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:41, skipping insertion in model container [2020-10-28 10:13:41,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:13:41" (1/1) ... [2020-10-28 10:13:41,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:13:41,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:13:41,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:13:41,997 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:13:42,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:13:42,261 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:13:42,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42 WrapperNode [2020-10-28 10:13:42,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:13:42,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:13:42,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:13:42,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:13:42,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... [2020-10-28 10:13:42,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:13:42,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:13:42,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:13:42,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:13:42,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:13:42,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:13:42,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:13:42,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:13:42,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:13:42,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:13:42,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:13:42,533 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:13:42,533 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:13:42,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:13:42,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:13:42,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:13:42,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:13:42,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:13:42,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:13:44,524 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:13:44,525 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:13:44,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:13:44 BoogieIcfgContainer [2020-10-28 10:13:44,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:13:44,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:13:44,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:13:44,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:13:44,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:13:41" (1/3) ... [2020-10-28 10:13:44,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6772761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:13:44, skipping insertion in model container [2020-10-28 10:13:44,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:13:42" (2/3) ... [2020-10-28 10:13:44,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6772761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:13:44, skipping insertion in model container [2020-10-28 10:13:44,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:13:44" (3/3) ... [2020-10-28 10:13:44,536 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2020-10-28 10:13:44,548 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:13:44,553 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:13:44,566 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:13:44,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:13:44,595 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:13:44,595 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:13:44,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:13:44,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:13:44,596 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:13:44,596 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:13:44,596 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:13:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:13:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-28 10:13:44,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:44,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:44,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1945129884, now seen corresponding path program 1 times [2020-10-28 10:13:44,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:44,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038754181] [2020-10-28 10:13:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:45,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:50,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:50,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-28 10:13:50,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:50,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 10:13:50,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:50,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 208 [2020-10-28 10:13:50,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:13:50,649 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:50,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:50,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:50,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:50,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:50,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 10:13:50,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:50,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:50,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:13:50,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038754181] [2020-10-28 10:13:50,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:13:50,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:13:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33897006] [2020-10-28 10:13:50,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:13:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:13:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:13:50,975 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:13:51,249 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 10:13:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:54,753 INFO L93 Difference]: Finished difference Result 877 states and 1539 transitions. [2020-10-28 10:13:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:54,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 207 [2020-10-28 10:13:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:54,788 INFO L225 Difference]: With dead ends: 877 [2020-10-28 10:13:54,788 INFO L226 Difference]: Without dead ends: 484 [2020-10-28 10:13:54,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-28 10:13:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 466. [2020-10-28 10:13:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 10:13:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 751 transitions. [2020-10-28 10:13:54,960 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 751 transitions. Word has length 207 [2020-10-28 10:13:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:54,966 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 751 transitions. [2020-10-28 10:13:54,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:13:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 751 transitions. [2020-10-28 10:13:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 10:13:54,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:54,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:54,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:13:54,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1404249953, now seen corresponding path program 1 times [2020-10-28 10:13:54,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:54,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212285673] [2020-10-28 10:13:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:57,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:57,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-28 10:13:57,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:13:57,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2598 [2020-10-28 10:13:57,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:57,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:57,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 10:13:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-28 10:13:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:58,185 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:58,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:58,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:58,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:58,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:58,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:58,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:13:58,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:58,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-28 10:13:58,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:58,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:58,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:58,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:13:58,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:58,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:13:58,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:58,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:58,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 10:13:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:13:58,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212285673] [2020-10-28 10:13:58,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:58,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670144601] [2020-10-28 10:13:58,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:58,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:58,494 INFO L87 Difference]: Start difference. First operand 466 states and 751 transitions. Second operand 5 states. [2020-10-28 10:13:58,749 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:02,329 INFO L93 Difference]: Finished difference Result 1354 states and 2212 transitions. [2020-10-28 10:14:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:02,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-10-28 10:14:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:02,340 INFO L225 Difference]: With dead ends: 1354 [2020-10-28 10:14:02,340 INFO L226 Difference]: Without dead ends: 894 [2020-10-28 10:14:02,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-28 10:14:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2020-10-28 10:14:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-10-28 10:14:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1391 transitions. [2020-10-28 10:14:02,392 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1391 transitions. Word has length 217 [2020-10-28 10:14:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:02,393 INFO L481 AbstractCegarLoop]: Abstraction has 888 states and 1391 transitions. [2020-10-28 10:14:02,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1391 transitions. [2020-10-28 10:14:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 10:14:02,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:02,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:02,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:14:02,399 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1951688471, now seen corresponding path program 1 times [2020-10-28 10:14:02,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:02,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296827069] [2020-10-28 10:14:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:04,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:05,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:05,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 10:14:05,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:05,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3222 [2020-10-28 10:14:05,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:05,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 10:14:05,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-28 10:14:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,110 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:06,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 10:14:06,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:06,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:06,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:06,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:06,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 10:14:06,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:14:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296827069] [2020-10-28 10:14:06,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:06,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003738786] [2020-10-28 10:14:06,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:14:06,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:06,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:14:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:14:06,450 INFO L87 Difference]: Start difference. First operand 888 states and 1391 transitions. Second operand 5 states. [2020-10-28 10:14:06,700 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:09,616 INFO L93 Difference]: Finished difference Result 2626 states and 4187 transitions. [2020-10-28 10:14:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:09,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-10-28 10:14:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:09,628 INFO L225 Difference]: With dead ends: 2626 [2020-10-28 10:14:09,628 INFO L226 Difference]: Without dead ends: 1744 [2020-10-28 10:14:09,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2020-10-28 10:14:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1738. [2020-10-28 10:14:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-28 10:14:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2590 transitions. [2020-10-28 10:14:09,700 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2590 transitions. Word has length 221 [2020-10-28 10:14:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:09,701 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2590 transitions. [2020-10-28 10:14:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:14:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2590 transitions. [2020-10-28 10:14:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 10:14:09,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:09,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:09,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:14:09,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1338968844, now seen corresponding path program 1 times [2020-10-28 10:14:09,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:09,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140942668] [2020-10-28 10:14:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:09,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:11,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:11,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2012 [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:14:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:14:11,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-28 10:14:11,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,121 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:12,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:14:12,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:12,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:14:12,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 10:14:12,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140942668] [2020-10-28 10:14:12,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:12,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:14:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714701742] [2020-10-28 10:14:12,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:14:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:14:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:12,580 INFO L87 Difference]: Start difference. First operand 1738 states and 2590 transitions. Second operand 6 states. [2020-10-28 10:14:12,814 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:16,126 INFO L93 Difference]: Finished difference Result 5248 states and 8224 transitions. [2020-10-28 10:14:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:14:16,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2020-10-28 10:14:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:16,154 INFO L225 Difference]: With dead ends: 5248 [2020-10-28 10:14:16,154 INFO L226 Difference]: Without dead ends: 3516 [2020-10-28 10:14:16,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2020-10-28 10:14:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3479. [2020-10-28 10:14:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-10-28 10:14:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5092 transitions. [2020-10-28 10:14:16,319 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5092 transitions. Word has length 239 [2020-10-28 10:14:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:16,320 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 5092 transitions. [2020-10-28 10:14:16,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:14:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5092 transitions. [2020-10-28 10:14:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-28 10:14:16,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:16,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:16,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:14:16,335 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1864609133, now seen corresponding path program 1 times [2020-10-28 10:14:16,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:16,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264640522] [2020-10-28 10:14:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:19,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:21,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 10:14:21,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:21,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-28 10:14:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:21,747 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:21,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:21,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:21,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:14:21,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:21,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:21,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:21,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:21,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:21,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:14:21,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:14:22,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264640522] [2020-10-28 10:14:22,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:22,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:14:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620283555] [2020-10-28 10:14:22,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:14:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:14:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:22,160 INFO L87 Difference]: Start difference. First operand 3479 states and 5092 transitions. Second operand 6 states. [2020-10-28 10:14:22,606 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:26,147 INFO L93 Difference]: Finished difference Result 9988 states and 15267 transitions. [2020-10-28 10:14:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:14:26,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 247 [2020-10-28 10:14:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:26,194 INFO L225 Difference]: With dead ends: 9988 [2020-10-28 10:14:26,194 INFO L226 Difference]: Without dead ends: 6515 [2020-10-28 10:14:26,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2020-10-28 10:14:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6465. [2020-10-28 10:14:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6465 states. [2020-10-28 10:14:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6465 states to 6465 states and 9059 transitions. [2020-10-28 10:14:26,445 INFO L78 Accepts]: Start accepts. Automaton has 6465 states and 9059 transitions. Word has length 247 [2020-10-28 10:14:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:26,446 INFO L481 AbstractCegarLoop]: Abstraction has 6465 states and 9059 transitions. [2020-10-28 10:14:26,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:14:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6465 states and 9059 transitions. [2020-10-28 10:14:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 10:14:26,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:26,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:26,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:14:26,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2001237081, now seen corresponding path program 1 times [2020-10-28 10:14:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:26,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26626862] [2020-10-28 10:14:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4080 [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:14:30,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,877 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:30,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:30,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:30,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:31,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:31,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:31,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:31,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:31,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:14:31,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:14:31,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:14:31,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26626862] [2020-10-28 10:14:31,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:31,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:31,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544819836] [2020-10-28 10:14:31,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:31,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:31,345 INFO L87 Difference]: Start difference. First operand 6465 states and 9059 transitions. Second operand 7 states. [2020-10-28 10:14:31,775 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:32,029 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:37,364 INFO L93 Difference]: Finished difference Result 19062 states and 29047 transitions. [2020-10-28 10:14:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:37,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-28 10:14:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:37,469 INFO L225 Difference]: With dead ends: 19062 [2020-10-28 10:14:37,470 INFO L226 Difference]: Without dead ends: 12811 [2020-10-28 10:14:37,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12811 states. [2020-10-28 10:14:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12811 to 11356. [2020-10-28 10:14:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11356 states. [2020-10-28 10:14:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11356 states to 11356 states and 16158 transitions. [2020-10-28 10:14:38,178 INFO L78 Accepts]: Start accepts. Automaton has 11356 states and 16158 transitions. Word has length 253 [2020-10-28 10:14:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:38,179 INFO L481 AbstractCegarLoop]: Abstraction has 11356 states and 16158 transitions. [2020-10-28 10:14:38,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11356 states and 16158 transitions. [2020-10-28 10:14:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 10:14:38,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:38,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:38,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:14:38,229 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash -969831047, now seen corresponding path program 1 times [2020-10-28 10:14:38,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:38,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118629997] [2020-10-28 10:14:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:40,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:40,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2641 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:40,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:14:40,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 10:14:40,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:41,199 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:41,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:41,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:41,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:14:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:41,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:41,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:14:41,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 10:14:41,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:41,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:14:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:41,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 10:14:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:41,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:41,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:41,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:41,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:14:41,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118629997] [2020-10-28 10:14:41,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:41,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099510466] [2020-10-28 10:14:41,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:41,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:41,639 INFO L87 Difference]: Start difference. First operand 11356 states and 16158 transitions. Second operand 7 states. [2020-10-28 10:14:41,895 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:42,595 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:14:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:46,220 INFO L93 Difference]: Finished difference Result 31566 states and 45996 transitions. [2020-10-28 10:14:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:46,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-28 10:14:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:46,308 INFO L225 Difference]: With dead ends: 31566 [2020-10-28 10:14:46,308 INFO L226 Difference]: Without dead ends: 20636 [2020-10-28 10:14:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20636 states. [2020-10-28 10:14:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20636 to 20581. [2020-10-28 10:14:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20581 states. [2020-10-28 10:14:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20581 states to 20581 states and 28986 transitions. [2020-10-28 10:14:47,164 INFO L78 Accepts]: Start accepts. Automaton has 20581 states and 28986 transitions. Word has length 253 [2020-10-28 10:14:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:47,165 INFO L481 AbstractCegarLoop]: Abstraction has 20581 states and 28986 transitions. [2020-10-28 10:14:47,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20581 states and 28986 transitions. [2020-10-28 10:14:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 10:14:47,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:47,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:47,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:14:47,241 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash 129494444, now seen corresponding path program 1 times [2020-10-28 10:14:47,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:47,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953651838] [2020-10-28 10:14:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:49,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 10:14:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 10:14:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:52,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 10:14:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:14:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:14:52,630 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:52,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:52,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:52,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:52,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 10:14:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:52,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:14:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:52,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:14:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:52,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 10:14:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:52,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:52,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:14:52,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:52,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:14:53,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953651838] [2020-10-28 10:14:53,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:53,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054913855] [2020-10-28 10:14:53,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:53,051 INFO L87 Difference]: Start difference. First operand 20581 states and 28986 transitions. Second operand 7 states. [2020-10-28 10:14:53,340 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:14:53,729 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:57,051 INFO L93 Difference]: Finished difference Result 44640 states and 69649 transitions. [2020-10-28 10:14:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:57,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-28 10:14:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:57,191 INFO L225 Difference]: With dead ends: 44640 [2020-10-28 10:14:57,191 INFO L226 Difference]: Without dead ends: 24691 [2020-10-28 10:14:57,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24691 states. [2020-10-28 10:14:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24691 to 23328. [2020-10-28 10:14:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23328 states. [2020-10-28 10:14:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23328 states to 23328 states and 31667 transitions. [2020-10-28 10:14:58,382 INFO L78 Accepts]: Start accepts. Automaton has 23328 states and 31667 transitions. Word has length 264 [2020-10-28 10:14:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:58,382 INFO L481 AbstractCegarLoop]: Abstraction has 23328 states and 31667 transitions. [2020-10-28 10:14:58,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23328 states and 31667 transitions. [2020-10-28 10:14:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-28 10:14:58,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:58,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:58,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:14:58,441 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash 560316548, now seen corresponding path program 1 times [2020-10-28 10:14:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:58,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541341759] [2020-10-28 10:14:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:00,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:01,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:02,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:02,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-28 10:15:02,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:15:02,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4470 [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 10:15:02,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:03,245 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:03,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:03,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:03,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:03,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:03,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:03,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:03,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:03,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:15:03,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:03,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:15:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:03,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:03,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:15:03,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:03,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:03,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 10:15:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:03,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:03,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:03,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:03,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 10:15:03,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:03,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:15:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 77 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:15:03,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541341759] [2020-10-28 10:15:03,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:03,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:03,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620580738] [2020-10-28 10:15:03,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:03,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:03,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:03,676 INFO L87 Difference]: Start difference. First operand 23328 states and 31667 transitions. Second operand 7 states. [2020-10-28 10:15:04,137 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:04,560 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:09,867 INFO L93 Difference]: Finished difference Result 54831 states and 80402 transitions. [2020-10-28 10:15:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:09,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 276 [2020-10-28 10:15:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:10,030 INFO L225 Difference]: With dead ends: 54831 [2020-10-28 10:15:10,030 INFO L226 Difference]: Without dead ends: 32137 [2020-10-28 10:15:10,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2020-10-28 10:15:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 29886. [2020-10-28 10:15:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29886 states. [2020-10-28 10:15:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29886 states to 29886 states and 40450 transitions. [2020-10-28 10:15:11,132 INFO L78 Accepts]: Start accepts. Automaton has 29886 states and 40450 transitions. Word has length 276 [2020-10-28 10:15:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:11,133 INFO L481 AbstractCegarLoop]: Abstraction has 29886 states and 40450 transitions. [2020-10-28 10:15:11,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29886 states and 40450 transitions. [2020-10-28 10:15:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-28 10:15:11,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:11,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:11,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:15:11,244 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2050081579, now seen corresponding path program 1 times [2020-10-28 10:15:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:11,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833769686] [2020-10-28 10:15:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:11,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:12,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:15:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:15:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-28 10:15:13,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,792 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:13,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:13,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:15:13,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:13,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:13,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:14,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:14,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:14,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:15:14,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 10:15:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833769686] [2020-10-28 10:15:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:15:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809170981] [2020-10-28 10:15:14,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:15:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:15:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:15:14,229 INFO L87 Difference]: Start difference. First operand 29886 states and 40450 transitions. Second operand 6 states. [2020-10-28 10:15:14,482 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:17,798 INFO L93 Difference]: Finished difference Result 64089 states and 87239 transitions. [2020-10-28 10:15:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:15:17,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 274 [2020-10-28 10:15:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:17,906 INFO L225 Difference]: With dead ends: 64089 [2020-10-28 10:15:17,906 INFO L226 Difference]: Without dead ends: 34853 [2020-10-28 10:15:17,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34853 states. [2020-10-28 10:15:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34853 to 34301. [2020-10-28 10:15:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34301 states. [2020-10-28 10:15:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34301 states to 34301 states and 44939 transitions. [2020-10-28 10:15:18,922 INFO L78 Accepts]: Start accepts. Automaton has 34301 states and 44939 transitions. Word has length 274 [2020-10-28 10:15:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:18,923 INFO L481 AbstractCegarLoop]: Abstraction has 34301 states and 44939 transitions. [2020-10-28 10:15:18,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:15:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34301 states and 44939 transitions. [2020-10-28 10:15:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-28 10:15:18,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:18,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:18,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:15:18,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash 917097691, now seen corresponding path program 1 times [2020-10-28 10:15:18,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:18,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366572841] [2020-10-28 10:15:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:19,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:20,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-28 10:15:20,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:20,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-28 10:15:20,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:20,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 10:15:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 10:15:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:21,118 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:21,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:21,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:21,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:21,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:21,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:15:21,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:21,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:21,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:21,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:21,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:21,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:15:21,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:15:21,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:21,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:15:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:21,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:15:21,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:15:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366572841] [2020-10-28 10:15:21,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:21,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:21,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843705500] [2020-10-28 10:15:21,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:21,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:21,606 INFO L87 Difference]: Start difference. First operand 34301 states and 44939 transitions. Second operand 7 states. [2020-10-28 10:15:22,097 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:23,512 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:26,014 INFO L93 Difference]: Finished difference Result 59651 states and 81766 transitions. [2020-10-28 10:15:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:15:26,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 276 [2020-10-28 10:15:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:26,148 INFO L225 Difference]: With dead ends: 59651 [2020-10-28 10:15:26,148 INFO L226 Difference]: Without dead ends: 31342 [2020-10-28 10:15:26,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:15:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2020-10-28 10:15:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 29960. [2020-10-28 10:15:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29960 states. [2020-10-28 10:15:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29960 states to 29960 states and 37892 transitions. [2020-10-28 10:15:27,288 INFO L78 Accepts]: Start accepts. Automaton has 29960 states and 37892 transitions. Word has length 276 [2020-10-28 10:15:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:27,288 INFO L481 AbstractCegarLoop]: Abstraction has 29960 states and 37892 transitions. [2020-10-28 10:15:27,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 29960 states and 37892 transitions. [2020-10-28 10:15:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-28 10:15:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:27,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:27,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:15:27,333 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1772048691, now seen corresponding path program 1 times [2020-10-28 10:15:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:27,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189643241] [2020-10-28 10:15:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:27,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:31,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:15:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:15:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 10:15:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:32,677 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:32,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:32,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:15:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:32,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:32,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:32,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:15:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:15:32,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:33,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 10:15:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:33,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:33,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:33,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:33,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:33,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 10:15:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189643241] [2020-10-28 10:15:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:33,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:15:33,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455218268] [2020-10-28 10:15:33,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:15:33,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:33,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:15:33,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:15:33,133 INFO L87 Difference]: Start difference. First operand 29960 states and 37892 transitions. Second operand 8 states. [2020-10-28 10:15:33,446 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:34,720 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:37,292 INFO L93 Difference]: Finished difference Result 58353 states and 75556 transitions. [2020-10-28 10:15:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:15:37,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 287 [2020-10-28 10:15:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:37,373 INFO L225 Difference]: With dead ends: 58353 [2020-10-28 10:15:37,374 INFO L226 Difference]: Without dead ends: 29030 [2020-10-28 10:15:37,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:15:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29030 states. [2020-10-28 10:15:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29030 to 28312. [2020-10-28 10:15:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28312 states. [2020-10-28 10:15:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28312 states to 28312 states and 34443 transitions. [2020-10-28 10:15:38,311 INFO L78 Accepts]: Start accepts. Automaton has 28312 states and 34443 transitions. Word has length 287 [2020-10-28 10:15:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:38,312 INFO L481 AbstractCegarLoop]: Abstraction has 28312 states and 34443 transitions. [2020-10-28 10:15:38,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:15:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28312 states and 34443 transitions. [2020-10-28 10:15:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-28 10:15:38,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:38,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:38,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:15:38,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -368366020, now seen corresponding path program 2 times [2020-10-28 10:15:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:38,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675074278] [2020-10-28 10:15:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:38,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:40,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 10:15:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 10:15:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 10:15:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:43,711 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:43,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:43,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:43,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:43,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:43,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:43,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:15:43,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:15:43,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:43,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 10:15:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:43,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:15:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:44,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:15:44,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:44,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 10:15:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:44,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:44,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:15:44,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:15:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 10:15:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:44,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:44,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:44,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:15:44,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:44,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 10:15:44,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:44,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:44,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:44,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:15:44,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:44,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 112 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 10:15:44,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675074278] [2020-10-28 10:15:44,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:44,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 10:15:44,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553208609] [2020-10-28 10:15:44,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 10:15:44,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:44,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 10:15:44,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 10:15:44,366 INFO L87 Difference]: Start difference. First operand 28312 states and 34443 transitions. Second operand 10 states. [2020-10-28 10:15:44,655 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:45,698 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 164 [2020-10-28 10:15:47,220 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 10:15:48,029 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 162 [2020-10-28 10:15:49,851 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 166 [2020-10-28 10:15:51,965 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 159 [2020-10-28 10:15:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:53,199 INFO L93 Difference]: Finished difference Result 55326 states and 72722 transitions. [2020-10-28 10:15:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 10:15:53,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 296 [2020-10-28 10:15:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:53,315 INFO L225 Difference]: With dead ends: 55326 [2020-10-28 10:15:53,315 INFO L226 Difference]: Without dead ends: 31545 [2020-10-28 10:15:53,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-10-28 10:15:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31545 states. [2020-10-28 10:15:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31545 to 30185. [2020-10-28 10:15:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30185 states. [2020-10-28 10:15:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30185 states to 30185 states and 36884 transitions. [2020-10-28 10:15:54,653 INFO L78 Accepts]: Start accepts. Automaton has 30185 states and 36884 transitions. Word has length 296 [2020-10-28 10:15:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:54,654 INFO L481 AbstractCegarLoop]: Abstraction has 30185 states and 36884 transitions. [2020-10-28 10:15:54,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 10:15:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 30185 states and 36884 transitions. [2020-10-28 10:15:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-28 10:15:54,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:54,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:54,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:15:54,700 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1873639214, now seen corresponding path program 1 times [2020-10-28 10:15:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:54,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250614293] [2020-10-28 10:15:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:54,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:56,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:56,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2113 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 10:15:56,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,161 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:57,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:57,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:15:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:15:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:57,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:57,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:15:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:15:57,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250614293] [2020-10-28 10:15:57,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:57,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:57,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712692373] [2020-10-28 10:15:57,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:57,725 INFO L87 Difference]: Start difference. First operand 30185 states and 36884 transitions. Second operand 7 states. [2020-10-28 10:15:58,152 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:59,181 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:16:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:02,101 INFO L93 Difference]: Finished difference Result 61958 states and 81338 transitions. [2020-10-28 10:16:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:16:02,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-28 10:16:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:02,201 INFO L225 Difference]: With dead ends: 61958 [2020-10-28 10:16:02,201 INFO L226 Difference]: Without dead ends: 35438 [2020-10-28 10:16:02,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:16:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35438 states. [2020-10-28 10:16:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35438 to 34189. [2020-10-28 10:16:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34189 states. [2020-10-28 10:16:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34189 states to 34189 states and 41431 transitions. [2020-10-28 10:16:03,186 INFO L78 Accepts]: Start accepts. Automaton has 34189 states and 41431 transitions. Word has length 295 [2020-10-28 10:16:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:03,186 INFO L481 AbstractCegarLoop]: Abstraction has 34189 states and 41431 transitions. [2020-10-28 10:16:03,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34189 states and 41431 transitions. [2020-10-28 10:16:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 10:16:03,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:03,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:03,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:16:03,235 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 900471312, now seen corresponding path program 1 times [2020-10-28 10:16:03,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:03,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157275140] [2020-10-28 10:16:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 10:16:08,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:16:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:08,613 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:08,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:08,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:08,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:08,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:08,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:16:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:08,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:08,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:08,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:08,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:08,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 10:16:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:08,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:16:08,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:08,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:16:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:08,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 10:16:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:08,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:08,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:08,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:08,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:16:08,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 10:16:09,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157275140] [2020-10-28 10:16:09,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:09,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:09,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484803261] [2020-10-28 10:16:09,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:09,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:09,032 INFO L87 Difference]: Start difference. First operand 34189 states and 41431 transitions. Second operand 7 states. [2020-10-28 10:16:09,459 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:10,161 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:16,151 INFO L93 Difference]: Finished difference Result 120538 states and 156388 transitions. [2020-10-28 10:16:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:16:16,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 299 [2020-10-28 10:16:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:16,391 INFO L225 Difference]: With dead ends: 120538 [2020-10-28 10:16:16,391 INFO L226 Difference]: Without dead ends: 90882 [2020-10-28 10:16:16,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:16:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90882 states. [2020-10-28 10:16:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90882 to 90818. [2020-10-28 10:16:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90818 states. [2020-10-28 10:16:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90818 states to 90818 states and 118225 transitions. [2020-10-28 10:16:19,380 INFO L78 Accepts]: Start accepts. Automaton has 90818 states and 118225 transitions. Word has length 299 [2020-10-28 10:16:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:19,380 INFO L481 AbstractCegarLoop]: Abstraction has 90818 states and 118225 transitions. [2020-10-28 10:16:19,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 90818 states and 118225 transitions. [2020-10-28 10:16:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 10:16:19,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:19,743 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:19,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:16:19,744 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1925208087, now seen corresponding path program 1 times [2020-10-28 10:16:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:19,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706586172] [2020-10-28 10:16:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:19,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:24,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 10:16:24,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:16:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,097 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:25,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:25,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:16:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:16:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 10:16:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:16:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 10:16:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:25,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:25,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:16:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 112 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 10:16:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706586172] [2020-10-28 10:16:25,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:25,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:25,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079175607] [2020-10-28 10:16:25,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:16:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:16:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:16:25,492 INFO L87 Difference]: Start difference. First operand 90818 states and 118225 transitions. Second operand 7 states. [2020-10-28 10:16:25,947 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:16:26,444 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:16:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:35,706 INFO L93 Difference]: Finished difference Result 235990 states and 333243 transitions. [2020-10-28 10:16:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:16:35,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 299 [2020-10-28 10:16:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:36,604 INFO L225 Difference]: With dead ends: 235990 [2020-10-28 10:16:36,604 INFO L226 Difference]: Without dead ends: 146229 [2020-10-28 10:16:36,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:16:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146229 states. [2020-10-28 10:16:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146229 to 140457. [2020-10-28 10:16:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140457 states. [2020-10-28 10:16:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140457 states to 140457 states and 180788 transitions. [2020-10-28 10:16:41,665 INFO L78 Accepts]: Start accepts. Automaton has 140457 states and 180788 transitions. Word has length 299 [2020-10-28 10:16:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:41,666 INFO L481 AbstractCegarLoop]: Abstraction has 140457 states and 180788 transitions. [2020-10-28 10:16:41,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:16:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 140457 states and 180788 transitions. [2020-10-28 10:16:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-28 10:16:42,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:42,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:42,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 10:16:42,082 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1457908293, now seen corresponding path program 1 times [2020-10-28 10:16:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:42,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309984730] [2020-10-28 10:16:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2490 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 10:16:44,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:44,897 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:16:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:16:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:44,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:45,046 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:16:45,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:16:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:45,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:45,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:45,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:16:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:45,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 10:16:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:16:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:16:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:16:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 10:16:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:16:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 94 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 10:16:45,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309984730] [2020-10-28 10:16:45,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:16:45,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:16:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252332797] [2020-10-28 10:16:45,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:16:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:16:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:16:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:16:45,630 INFO L87 Difference]: Start difference. First operand 140457 states and 180788 transitions. Second operand 8 states. [2020-10-28 10:16:45,897 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:16:47,378 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:16:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:16:52,565 INFO L93 Difference]: Finished difference Result 271845 states and 351072 transitions. [2020-10-28 10:16:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:16:52,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 306 [2020-10-28 10:16:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:16:53,135 INFO L225 Difference]: With dead ends: 271845 [2020-10-28 10:16:53,135 INFO L226 Difference]: Without dead ends: 157865 [2020-10-28 10:16:53,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:16:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157865 states. [2020-10-28 10:16:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157865 to 157734. [2020-10-28 10:16:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157734 states. [2020-10-28 10:16:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157734 states to 157734 states and 202056 transitions. [2020-10-28 10:16:57,892 INFO L78 Accepts]: Start accepts. Automaton has 157734 states and 202056 transitions. Word has length 306 [2020-10-28 10:16:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:16:57,892 INFO L481 AbstractCegarLoop]: Abstraction has 157734 states and 202056 transitions. [2020-10-28 10:16:57,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:16:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 157734 states and 202056 transitions. [2020-10-28 10:16:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 10:16:58,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:16:58,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:16:58,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 10:16:58,427 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:16:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:16:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash 824879779, now seen corresponding path program 1 times [2020-10-28 10:16:58,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:16:58,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754259716] [2020-10-28 10:16:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:16:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:16:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:58,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:58,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:16:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking...