/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=SHALLOWEST --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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:49:31,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:49:31,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:49:31,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:49:31,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:49:31,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:49:31,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:49:31,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:49:31,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:49:31,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:49:31,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:49:31,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:49:31,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:49:31,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:49:31,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:49:31,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:49:31,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:49:31,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:49:31,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:49:31,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:49:31,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:49:31,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:49:31,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:49:31,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:49:31,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:49:31,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:49:31,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:49:31,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:49:31,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:49:31,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:49:31,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:49:31,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:49:31,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:49:31,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:49:31,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:49:31,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:49:31,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:49:31,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:49:31,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:49:31,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:49:31,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:49:31,376 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 [2020-10-26 20:49:31,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:49:31,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:49:31,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:49:31,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:49:31,406 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:49:31,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:49:31,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:49:31,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:49:31,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:49:31,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:49:31,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:49:31,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:49:31,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:49:31,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:49:31,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:49:31,409 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:49:31,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:49:31,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:49:31,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:49:31,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:49:31,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:49:31,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:49:31,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:49:31,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:49:31,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:49:31,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:49:31,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:49:31,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:49:31,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:49:31,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:49:31,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:49:31,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:49:31,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:49:31,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:49:31,863 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:49:31,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label41.c [2020-10-26 20:49:31,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12d824767/623ce7289c844216bf634c8b116bc5a1/FLAG36065b854 [2020-10-26 20:49:32,753 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:49:32,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label41.c [2020-10-26 20:49:32,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12d824767/623ce7289c844216bf634c8b116bc5a1/FLAG36065b854 [2020-10-26 20:49:32,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12d824767/623ce7289c844216bf634c8b116bc5a1 [2020-10-26 20:49:32,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:49:32,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:49:32,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:49:32,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:49:32,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:49:32,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:49:32" (1/1) ... [2020-10-26 20:49:32,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39de5959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:32, skipping insertion in model container [2020-10-26 20:49:32,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:49:32" (1/1) ... [2020-10-26 20:49:32,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:49:33,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:49:33,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:49:33,955 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:49:34,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:49:34,247 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:49:34,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34 WrapperNode [2020-10-26 20:49:34,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:49:34,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:49:34,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:49:34,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:49:34,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (1/1) ... [2020-10-26 20:49:34,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:49:34,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:49:34,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:49:34,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:49:34,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (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 [2020-10-26 20:49:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:49:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:49:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:49:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:49:34,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:49:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:49:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:49:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:49:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:49:34,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:49:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:49:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:49:34,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:49:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:49:34,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:49:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:49:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:49:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:49:34,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:49:36,978 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:49:36,979 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:49:36,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:49:36 BoogieIcfgContainer [2020-10-26 20:49:36,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:49:36,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:49:36,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:49:36,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:49:36,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:49:32" (1/3) ... [2020-10-26 20:49:36,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ffa0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:49:36, skipping insertion in model container [2020-10-26 20:49:36,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:49:34" (2/3) ... [2020-10-26 20:49:36,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ffa0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:49:36, skipping insertion in model container [2020-10-26 20:49:36,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:49:36" (3/3) ... [2020-10-26 20:49:36,990 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2020-10-26 20:49:37,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:49:37,009 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:49:37,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:49:37,056 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:49:37,056 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:49:37,056 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:49:37,056 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:49:37,057 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:49:37,057 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:49:37,057 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:49:37,057 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:49:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:49:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 20:49:37,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:37,102 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] [2020-10-26 20:49:37,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -683316068, now seen corresponding path program 1 times [2020-10-26 20:49:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779075456] [2020-10-26 20:49:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:38,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:42,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 20:49:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 20:49:42,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 20:49:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:49:43,157 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:43,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:43,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:43,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:43,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:43,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:49:43,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:43,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779075456] [2020-10-26 20:49:43,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:49:43,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:49:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033077494] [2020-10-26 20:49:43,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:49:43,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:43,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:49:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:49:43,389 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 5 states. [2020-10-26 20:49:43,708 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:44,357 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:48,947 INFO L93 Difference]: Finished difference Result 1109 states and 1970 transitions. [2020-10-26 20:49:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:49:48,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2020-10-26 20:49:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:48,978 INFO L225 Difference]: With dead ends: 1109 [2020-10-26 20:49:48,979 INFO L226 Difference]: Without dead ends: 697 [2020-10-26 20:49:48,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-26 20:49:49,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 473. [2020-10-26 20:49:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-26 20:49:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 723 transitions. [2020-10-26 20:49:49,083 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 723 transitions. Word has length 189 [2020-10-26 20:49:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:49,085 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 723 transitions. [2020-10-26 20:49:49,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:49:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 723 transitions. [2020-10-26 20:49:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 20:49:49,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:49,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:49,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:49:49,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:49,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1606113291, now seen corresponding path program 1 times [2020-10-26 20:49:49,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:49,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562325057] [2020-10-26 20:49:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:51,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:51,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-26 20:49:51,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:51,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2710 [2020-10-26 20:49:51,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:51,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:51,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 20:49:51,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,224 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:52,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:52,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:52,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:52,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:49:52,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:52,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:52,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:52,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:52,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:49:52,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:49:52,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:52,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:52,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:49:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:49:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562325057] [2020-10-26 20:49:52,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:52,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043832995] [2020-10-26 20:49:52,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:52,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:52,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:52,568 INFO L87 Difference]: Start difference. First operand 473 states and 723 transitions. Second operand 7 states. [2020-10-26 20:49:52,885 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:56,177 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:57,036 INFO L93 Difference]: Finished difference Result 1421 states and 2205 transitions. [2020-10-26 20:49:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:57,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2020-10-26 20:49:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:57,044 INFO L225 Difference]: With dead ends: 1421 [2020-10-26 20:49:57,044 INFO L226 Difference]: Without dead ends: 954 [2020-10-26 20:49:57,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-10-26 20:49:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 933. [2020-10-26 20:49:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2020-10-26 20:49:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1364 transitions. [2020-10-26 20:49:57,108 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1364 transitions. Word has length 198 [2020-10-26 20:49:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 933 states and 1364 transitions. [2020-10-26 20:49:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1364 transitions. [2020-10-26 20:49:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-26 20:49:57,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:57,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:57,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:49:57,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1786278243, now seen corresponding path program 1 times [2020-10-26 20:49:57,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:57,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528622754] [2020-10-26 20:49:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 20:49:59,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-26 20:49:59,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:49:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,555 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:59,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:49:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,752 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:59,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:59,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:49:59,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:59,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:49:59,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:59,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:49:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:59,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528622754] [2020-10-26 20:49:59,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:49:59,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:49:59,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320335790] [2020-10-26 20:49:59,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:59,948 INFO L87 Difference]: Start difference. First operand 933 states and 1364 transitions. Second operand 7 states. [2020-10-26 20:50:00,309 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:03,360 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:04,292 INFO L93 Difference]: Finished difference Result 2825 states and 4254 transitions. [2020-10-26 20:50:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:04,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-10-26 20:50:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:04,314 INFO L225 Difference]: With dead ends: 2825 [2020-10-26 20:50:04,314 INFO L226 Difference]: Without dead ends: 1898 [2020-10-26 20:50:04,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-10-26 20:50:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1867. [2020-10-26 20:50:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1867 states. [2020-10-26 20:50:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2723 transitions. [2020-10-26 20:50:04,437 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2723 transitions. Word has length 201 [2020-10-26 20:50:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:04,442 INFO L481 AbstractCegarLoop]: Abstraction has 1867 states and 2723 transitions. [2020-10-26 20:50:04,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2723 transitions. [2020-10-26 20:50:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 20:50:04,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:04,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-26 20:50:04,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:50:04,453 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash 484135398, now seen corresponding path program 1 times [2020-10-26 20:50:04,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:04,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680440654] [2020-10-26 20:50:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:04,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:50:09,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,890 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:09,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:09,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:50:09,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:09,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:50:10,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:50:10,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:50:10,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 20:50:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 20:50:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:50:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:10,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680440654] [2020-10-26 20:50:10,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:10,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554621521] [2020-10-26 20:50:10,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:10,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:10,306 INFO L87 Difference]: Start difference. First operand 1867 states and 2723 transitions. Second operand 8 states. [2020-10-26 20:50:10,583 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:14,846 INFO L93 Difference]: Finished difference Result 5681 states and 8469 transitions. [2020-10-26 20:50:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:50:14,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 212 [2020-10-26 20:50:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:14,877 INFO L225 Difference]: With dead ends: 5681 [2020-10-26 20:50:14,877 INFO L226 Difference]: Without dead ends: 3820 [2020-10-26 20:50:14,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2020-10-26 20:50:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 3775. [2020-10-26 20:50:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3775 states. [2020-10-26 20:50:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 5547 transitions. [2020-10-26 20:50:15,029 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 5547 transitions. Word has length 212 [2020-10-26 20:50:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:15,029 INFO L481 AbstractCegarLoop]: Abstraction has 3775 states and 5547 transitions. [2020-10-26 20:50:15,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 5547 transitions. [2020-10-26 20:50:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 20:50:15,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:15,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:50:15,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:50:15,042 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash 370380910, now seen corresponding path program 1 times [2020-10-26 20:50:15,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:15,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479088249] [2020-10-26 20:50:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:17,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-26 20:50:20,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:20,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 20:50:20,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:20,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:20,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 20:50:20,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:50:20,504 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:20,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:20,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:50:20,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:20,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:20,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:50:20,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 20:50:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:50:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:50:20,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479088249] [2020-10-26 20:50:20,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:20,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:50:20,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013628716] [2020-10-26 20:50:20,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:20,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:20,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:20,902 INFO L87 Difference]: Start difference. First operand 3775 states and 5547 transitions. Second operand 7 states. [2020-10-26 20:50:21,199 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:25,249 INFO L93 Difference]: Finished difference Result 11337 states and 16789 transitions. [2020-10-26 20:50:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:50:25,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 221 [2020-10-26 20:50:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:25,305 INFO L225 Difference]: With dead ends: 11337 [2020-10-26 20:50:25,306 INFO L226 Difference]: Without dead ends: 7568 [2020-10-26 20:50:25,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2020-10-26 20:50:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 7541. [2020-10-26 20:50:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7541 states. [2020-10-26 20:50:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 11146 transitions. [2020-10-26 20:50:25,699 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 11146 transitions. Word has length 221 [2020-10-26 20:50:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:25,702 INFO L481 AbstractCegarLoop]: Abstraction has 7541 states and 11146 transitions. [2020-10-26 20:50:25,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 11146 transitions. [2020-10-26 20:50:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-26 20:50:25,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:25,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:25,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:50:25,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1840836152, now seen corresponding path program 1 times [2020-10-26 20:50:25,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:25,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187344919] [2020-10-26 20:50:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:25,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:30,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:30,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:50:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:31,058 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:31,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:31,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:31,201 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:50:31,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:31,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:31,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:50:31,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:31,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 20:50:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:31,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:31,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:31,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:50:31,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187344919] [2020-10-26 20:50:31,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:31,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104741004] [2020-10-26 20:50:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:31,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:31,404 INFO L87 Difference]: Start difference. First operand 7541 states and 11146 transitions. Second operand 7 states. [2020-10-26 20:50:31,662 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:32,159 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:35,293 INFO L93 Difference]: Finished difference Result 22771 states and 35053 transitions. [2020-10-26 20:50:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:35,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 225 [2020-10-26 20:50:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:35,390 INFO L225 Difference]: With dead ends: 22771 [2020-10-26 20:50:35,390 INFO L226 Difference]: Without dead ends: 15236 [2020-10-26 20:50:35,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2020-10-26 20:50:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 15041. [2020-10-26 20:50:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15041 states. [2020-10-26 20:50:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15041 states to 15041 states and 21875 transitions. [2020-10-26 20:50:36,078 INFO L78 Accepts]: Start accepts. Automaton has 15041 states and 21875 transitions. Word has length 225 [2020-10-26 20:50:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:36,078 INFO L481 AbstractCegarLoop]: Abstraction has 15041 states and 21875 transitions. [2020-10-26 20:50:36,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 15041 states and 21875 transitions. [2020-10-26 20:50:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:50:36,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:36,128 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:36,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:50:36,129 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash -214113804, now seen corresponding path program 1 times [2020-10-26 20:50:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:36,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015861916] [2020-10-26 20:50:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:36,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:40,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:40,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 20:50:40,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:40,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4406 [2020-10-26 20:50:40,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:40,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:40,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:50:40,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:40,963 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:40,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:41,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:41,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:41,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:50:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:41,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:50:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:41,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:41,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:50:41,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 20:50:41,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:50:41,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:50:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:41,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015861916] [2020-10-26 20:50:41,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:41,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046613821] [2020-10-26 20:50:41,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:41,494 INFO L87 Difference]: Start difference. First operand 15041 states and 21875 transitions. Second operand 8 states. [2020-10-26 20:50:41,763 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:44,170 INFO L93 Difference]: Finished difference Result 29644 states and 43484 transitions. [2020-10-26 20:50:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:50:44,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 227 [2020-10-26 20:50:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:44,240 INFO L225 Difference]: With dead ends: 29644 [2020-10-26 20:50:44,240 INFO L226 Difference]: Without dead ends: 14609 [2020-10-26 20:50:44,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14609 states. [2020-10-26 20:50:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14609 to 14605. [2020-10-26 20:50:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14605 states. [2020-10-26 20:50:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14605 states to 14605 states and 20915 transitions. [2020-10-26 20:50:44,696 INFO L78 Accepts]: Start accepts. Automaton has 14605 states and 20915 transitions. Word has length 227 [2020-10-26 20:50:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:44,697 INFO L481 AbstractCegarLoop]: Abstraction has 14605 states and 20915 transitions. [2020-10-26 20:50:44,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14605 states and 20915 transitions. [2020-10-26 20:50:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 20:50:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:44,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:44,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:50:44,741 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1498292186, now seen corresponding path program 1 times [2020-10-26 20:50:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858495352] [2020-10-26 20:50:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:44,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:45,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:46,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:50:46,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:50:46,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:47,171 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:47,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:47,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:47,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:47,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:47,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:47,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:47,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:50:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:50:47,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858495352] [2020-10-26 20:50:47,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:50:47,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:50:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626260624] [2020-10-26 20:50:47,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:47,548 INFO L87 Difference]: Start difference. First operand 14605 states and 20915 transitions. Second operand 7 states. [2020-10-26 20:50:47,838 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:48,353 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:51,569 INFO L93 Difference]: Finished difference Result 31908 states and 50367 transitions. [2020-10-26 20:50:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:50:51,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-26 20:50:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:51,669 INFO L225 Difference]: With dead ends: 31908 [2020-10-26 20:50:51,670 INFO L226 Difference]: Without dead ends: 17309 [2020-10-26 20:50:51,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:50:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17309 states. [2020-10-26 20:50:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17309 to 16589. [2020-10-26 20:50:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16589 states. [2020-10-26 20:50:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16589 states to 16589 states and 23317 transitions. [2020-10-26 20:50:52,386 INFO L78 Accepts]: Start accepts. Automaton has 16589 states and 23317 transitions. Word has length 234 [2020-10-26 20:50:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:52,386 INFO L481 AbstractCegarLoop]: Abstraction has 16589 states and 23317 transitions. [2020-10-26 20:50:52,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16589 states and 23317 transitions. [2020-10-26 20:50:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-26 20:50:52,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:52,440 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:52,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:50:52,440 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1268840692, now seen corresponding path program 1 times [2020-10-26 20:50:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:52,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699925656] [2020-10-26 20:50:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:53,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:56,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:56,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-26 20:50:56,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3561 [2020-10-26 20:50:56,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:50:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-26 20:50:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:56,480 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:56,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:56,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:56,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:56,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:56,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:56,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:56,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:56,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:56,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:50:56,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:56,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:56,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:56,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:50:56,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 20:50:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:50:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699925656] [2020-10-26 20:50:57,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:57,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382098240] [2020-10-26 20:50:57,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:50:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:50:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:57,140 INFO L87 Difference]: Start difference. First operand 16589 states and 23317 transitions. Second operand 9 states. [2020-10-26 20:50:57,432 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:50:58,394 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 168 [2020-10-26 20:51:01,677 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 167 [2020-10-26 20:51:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:05,300 INFO L93 Difference]: Finished difference Result 50253 states and 75717 transitions. [2020-10-26 20:51:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:51:05,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2020-10-26 20:51:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:05,435 INFO L225 Difference]: With dead ends: 50253 [2020-10-26 20:51:05,435 INFO L226 Difference]: Without dead ends: 33350 [2020-10-26 20:51:05,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:51:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33350 states. [2020-10-26 20:51:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33350 to 32903. [2020-10-26 20:51:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32903 states. [2020-10-26 20:51:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32903 states to 32903 states and 44547 transitions. [2020-10-26 20:51:06,522 INFO L78 Accepts]: Start accepts. Automaton has 32903 states and 44547 transitions. Word has length 235 [2020-10-26 20:51:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:06,523 INFO L481 AbstractCegarLoop]: Abstraction has 32903 states and 44547 transitions. [2020-10-26 20:51:06,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:51:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 32903 states and 44547 transitions. [2020-10-26 20:51:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 20:51:06,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:06,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:06,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:51:06,568 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash -399246006, now seen corresponding path program 1 times [2020-10-26 20:51:06,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:06,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384397246] [2020-10-26 20:51:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:06,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:07,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:09,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:09,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 20:51:09,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:51:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:09,935 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:09,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:09,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:09,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:09,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:51:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:51:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:51:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:10,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:10,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 71 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:51:10,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384397246] [2020-10-26 20:51:10,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:10,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822108860] [2020-10-26 20:51:10,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:10,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:10,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:10,616 INFO L87 Difference]: Start difference. First operand 32903 states and 44547 transitions. Second operand 7 states. [2020-10-26 20:51:10,874 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:11,900 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:51:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:14,684 INFO L93 Difference]: Finished difference Result 78407 states and 108581 transitions. [2020-10-26 20:51:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:51:14,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 266 [2020-10-26 20:51:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:14,867 INFO L225 Difference]: With dead ends: 78407 [2020-10-26 20:51:14,867 INFO L226 Difference]: Without dead ends: 48902 [2020-10-26 20:51:14,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:51:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48902 states. [2020-10-26 20:51:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48902 to 48263. [2020-10-26 20:51:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48263 states. [2020-10-26 20:51:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48263 states to 48263 states and 65802 transitions. [2020-10-26 20:51:16,735 INFO L78 Accepts]: Start accepts. Automaton has 48263 states and 65802 transitions. Word has length 266 [2020-10-26 20:51:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:16,735 INFO L481 AbstractCegarLoop]: Abstraction has 48263 states and 65802 transitions. [2020-10-26 20:51:16,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 48263 states and 65802 transitions. [2020-10-26 20:51:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 20:51:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:16,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:51:16,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:51:16,774 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -80164873, now seen corresponding path program 1 times [2020-10-26 20:51:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:16,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131952678] [2020-10-26 20:51:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:17,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:21,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:21,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:51:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:22,200 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:22,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:22,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:22,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:22,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:22,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:22,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:51:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:22,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:22,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:51:22,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:22,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:51:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:22,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:22,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:22,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:51:22,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:22,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:22,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:51:22,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131952678] [2020-10-26 20:51:22,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:22,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:22,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095076821] [2020-10-26 20:51:22,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:22,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:22,804 INFO L87 Difference]: Start difference. First operand 48263 states and 65802 transitions. Second operand 7 states. [2020-10-26 20:51:23,081 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:24,641 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:51:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:27,222 INFO L93 Difference]: Finished difference Result 122321 states and 170349 transitions. [2020-10-26 20:51:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:51:27,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 277 [2020-10-26 20:51:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:27,470 INFO L225 Difference]: With dead ends: 122321 [2020-10-26 20:51:27,471 INFO L226 Difference]: Without dead ends: 76604 [2020-10-26 20:51:27,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:51:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76604 states. [2020-10-26 20:51:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76604 to 75941. [2020-10-26 20:51:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75941 states. [2020-10-26 20:51:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75941 states to 75941 states and 102311 transitions. [2020-10-26 20:51:30,502 INFO L78 Accepts]: Start accepts. Automaton has 75941 states and 102311 transitions. Word has length 277 [2020-10-26 20:51:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:30,503 INFO L481 AbstractCegarLoop]: Abstraction has 75941 states and 102311 transitions. [2020-10-26 20:51:30,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75941 states and 102311 transitions. [2020-10-26 20:51:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-26 20:51:30,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:30,560 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:30,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:51:30,561 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -633118925, now seen corresponding path program 1 times [2020-10-26 20:51:30,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:30,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785942844] [2020-10-26 20:51:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:51:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:51:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:35,985 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:35,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:36,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:36,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:51:36,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:36,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 20:51:36,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:51:36,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:51:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:36,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:36,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:36,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:51:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:36,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:36,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:51:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:36,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:51:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:36,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:36,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 114 proven. 66 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 20:51:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785942844] [2020-10-26 20:51:36,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:36,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:36,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786285399] [2020-10-26 20:51:36,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:36,613 INFO L87 Difference]: Start difference. First operand 75941 states and 102311 transitions. Second operand 7 states. [2020-10-26 20:51:36,885 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:38,738 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:51:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:41,381 INFO L93 Difference]: Finished difference Result 178081 states and 243605 transitions. [2020-10-26 20:51:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:51:41,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 315 [2020-10-26 20:51:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:42,233 INFO L225 Difference]: With dead ends: 178081 [2020-10-26 20:51:42,233 INFO L226 Difference]: Without dead ends: 102984 [2020-10-26 20:51:42,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:51:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102984 states. [2020-10-26 20:51:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102984 to 101682. [2020-10-26 20:51:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101682 states. [2020-10-26 20:51:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101682 states to 101682 states and 137553 transitions. [2020-10-26 20:51:45,432 INFO L78 Accepts]: Start accepts. Automaton has 101682 states and 137553 transitions. Word has length 315 [2020-10-26 20:51:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:45,432 INFO L481 AbstractCegarLoop]: Abstraction has 101682 states and 137553 transitions. [2020-10-26 20:51:45,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 101682 states and 137553 transitions. [2020-10-26 20:51:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-26 20:51:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:45,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:51:45,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:51:45,514 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:45,515 INFO L82 PathProgramCache]: Analyzing trace with hash -28454803, now seen corresponding path program 1 times [2020-10-26 20:51:45,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:45,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394707702] [2020-10-26 20:51:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:45,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:46,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:49,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:50,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:50,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-26 20:51:50,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:51:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:51:50,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:51:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:51:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:50,930 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:50,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:50,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:50,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:50,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:50,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:50,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:51:50,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:50,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:50,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:50,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:50,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:51,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:51,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:51,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:51,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:51:51,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:51,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:51:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:51,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:51,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:51,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:51:51,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:51:51,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:51:51,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:51,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 20:51:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:51,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:51,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:51,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 128 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:51:51,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394707702] [2020-10-26 20:51:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:51:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248129177] [2020-10-26 20:51:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:51:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:51:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:51:51,793 INFO L87 Difference]: Start difference. First operand 101682 states and 137553 transitions. Second operand 7 states. [2020-10-26 20:51:52,082 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:51:53,025 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:51:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:57,241 INFO L93 Difference]: Finished difference Result 222704 states and 303049 transitions. [2020-10-26 20:51:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:51:57,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 323 [2020-10-26 20:51:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:57,611 INFO L225 Difference]: With dead ends: 222704 [2020-10-26 20:51:57,611 INFO L226 Difference]: Without dead ends: 123142 [2020-10-26 20:51:57,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:51:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123142 states. [2020-10-26 20:52:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123142 to 121949. [2020-10-26 20:52:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121949 states. [2020-10-26 20:52:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121949 states to 121949 states and 163814 transitions. [2020-10-26 20:52:01,407 INFO L78 Accepts]: Start accepts. Automaton has 121949 states and 163814 transitions. Word has length 323 [2020-10-26 20:52:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:01,408 INFO L481 AbstractCegarLoop]: Abstraction has 121949 states and 163814 transitions. [2020-10-26 20:52:01,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:52:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 121949 states and 163814 transitions. [2020-10-26 20:52:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-26 20:52:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:01,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:52:01,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:52:01,461 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:01,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash -751420219, now seen corresponding path program 1 times [2020-10-26 20:52:01,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:01,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442419380] [2020-10-26 20:52:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:02,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:04,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 20:52:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:06,848 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:06,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:07,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:07,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:07,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:52:07,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-26 20:52:07,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:07,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:52:07,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:52:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:07,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:07,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:52:07,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:52:07,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:52:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:07,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:52:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:07,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:07,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:07,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 149 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:52:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442419380] [2020-10-26 20:52:07,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:07,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:52:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971112861] [2020-10-26 20:52:07,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:52:07,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:52:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:07,796 INFO L87 Difference]: Start difference. First operand 121949 states and 163814 transitions. Second operand 8 states. [2020-10-26 20:52:08,049 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:52:09,305 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:52:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:13,021 INFO L93 Difference]: Finished difference Result 265476 states and 361492 transitions. [2020-10-26 20:52:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:52:13,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 344 [2020-10-26 20:52:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:13,494 INFO L225 Difference]: With dead ends: 265476 [2020-10-26 20:52:13,494 INFO L226 Difference]: Without dead ends: 148825 [2020-10-26 20:52:13,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:52:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148825 states. [2020-10-26 20:52:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148825 to 147707. [2020-10-26 20:52:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147707 states. [2020-10-26 20:52:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147707 states to 147707 states and 199865 transitions. [2020-10-26 20:52:17,372 INFO L78 Accepts]: Start accepts. Automaton has 147707 states and 199865 transitions. Word has length 344 [2020-10-26 20:52:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:17,372 INFO L481 AbstractCegarLoop]: Abstraction has 147707 states and 199865 transitions. [2020-10-26 20:52:17,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:52:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 147707 states and 199865 transitions. [2020-10-26 20:52:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-26 20:52:17,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:17,433 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:17,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:52:17,434 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash 861753706, now seen corresponding path program 1 times [2020-10-26 20:52:17,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:17,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914736461] [2020-10-26 20:52:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:17,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:22,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:22,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:22,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-26 20:52:22,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:52:22,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 20:52:22,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:52:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:22,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 20:52:22,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:22,815 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:22,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:22,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:22,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:23,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:23,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:52:23,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:23,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 20:52:23,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:52:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:23,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 20:52:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:23,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:23,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:23,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 20:52:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:23,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:23,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:23,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:52:23,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:52:23,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:52:23,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:23,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-26 20:52:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:23,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:23,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:23,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:52:23,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:52:23,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 20:52:23,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914736461] [2020-10-26 20:52:23,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:23,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:52:23,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144200397] [2020-10-26 20:52:23,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:52:23,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:52:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:52:23,617 INFO L87 Difference]: Start difference. First operand 147707 states and 199865 transitions. Second operand 7 states. [2020-10-26 20:52:23,892 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:52:24,896 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 20:52:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:30,347 INFO L93 Difference]: Finished difference Result 294084 states and 425632 transitions. [2020-10-26 20:52:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:52:30,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 355 [2020-10-26 20:52:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:31,165 INFO L225 Difference]: With dead ends: 294084 [2020-10-26 20:52:31,165 INFO L226 Difference]: Without dead ends: 147849 [2020-10-26 20:52:31,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:52:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147849 states. [2020-10-26 20:52:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147849 to 144023. [2020-10-26 20:52:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144023 states. [2020-10-26 20:52:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144023 states to 144023 states and 195989 transitions. [2020-10-26 20:52:35,635 INFO L78 Accepts]: Start accepts. Automaton has 144023 states and 195989 transitions. Word has length 355 [2020-10-26 20:52:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:35,635 INFO L481 AbstractCegarLoop]: Abstraction has 144023 states and 195989 transitions. [2020-10-26 20:52:35,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:52:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 144023 states and 195989 transitions. [2020-10-26 20:52:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-26 20:52:35,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:35,711 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:52:35,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:52:35,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:35,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1214409906, now seen corresponding path program 1 times [2020-10-26 20:52:35,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:35,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503707092] [2020-10-26 20:52:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:35,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:35,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:40,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 20:52:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,144 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:41,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:41,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:41,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:41,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:41,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 20:52:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:52:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:52:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 20:52:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:41,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-26 20:52:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:52:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 168 proven. 49 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 20:52:41,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503707092] [2020-10-26 20:52:41,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:41,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:52:41,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849159824] [2020-10-26 20:52:41,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:52:41,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:52:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:52:41,861 INFO L87 Difference]: Start difference. First operand 144023 states and 195989 transitions. Second operand 7 states. [2020-10-26 20:52:42,224 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:52:43,374 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 159