/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/Problem17_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:05:36,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:05:36,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:05:36,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:05:36,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:05:36,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:05:36,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:05:36,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:05:36,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:05:36,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:05:36,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:05:36,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:05:36,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:05:36,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:05:36,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:05:36,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:05:36,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:05:36,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:05:36,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:05:36,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:05:36,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:05:36,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:05:36,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:05:36,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:05:36,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:05:36,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:05:36,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:05:36,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:05:36,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:05:36,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:05:36,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:05:36,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:05:36,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:05:36,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:05:36,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:05:36,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:05:36,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:05:36,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:05:36,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:05:36,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:05:36,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:05:37,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:05:37,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:05:37,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:05:37,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:05:37,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:05:37,058 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:05:37,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:05:37,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:05:37,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:05:37,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:05:37,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:05:37,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:05:37,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:05:37,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:05:37,061 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:05:37,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:05:37,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:05:37,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:05:37,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:05:37,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:05:37,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:05:37,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:05:37,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:05:37,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:05:37,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:05:37,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:05:37,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:05:37,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:05:37,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:05:37,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:05:37,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:05:37,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:05:37,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:05:37,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:05:37,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:05:37,452 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:05:37,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label03.c [2020-10-27 00:05:37,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d4f80c8/4df30cc49c174c10ad90efaf270912ed/FLAGc1729807d [2020-10-27 00:05:38,335 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:05:38,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label03.c [2020-10-27 00:05:38,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d4f80c8/4df30cc49c174c10ad90efaf270912ed/FLAGc1729807d [2020-10-27 00:05:38,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d4f80c8/4df30cc49c174c10ad90efaf270912ed [2020-10-27 00:05:38,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:05:38,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:05:38,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:38,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:05:38,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:05:38,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:38" (1/1) ... [2020-10-27 00:05:38,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b40362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:38, skipping insertion in model container [2020-10-27 00:05:38,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:38" (1/1) ... [2020-10-27 00:05:38,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:05:38,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:05:39,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:39,735 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:05:40,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:40,378 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:05:40,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40 WrapperNode [2020-10-27 00:05:40,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:40,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:05:40,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:05:40,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:05:40,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... [2020-10-27 00:05:40,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:05:40,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:05:40,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:05:40,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:05:40,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:05:40,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:05:40,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:05:40,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:05:40,786 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:05:40,787 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:05:40,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:05:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:05:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:05:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:05:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:05:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:05:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:05:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:05:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:05:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:05:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:05:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:05:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:05:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:05:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:05:40,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:05:49,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:05:49,972 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:05:49,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:49 BoogieIcfgContainer [2020-10-27 00:05:49,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:05:49,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:05:49,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:05:49,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:05:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:05:38" (1/3) ... [2020-10-27 00:05:49,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad991bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:49, skipping insertion in model container [2020-10-27 00:05:49,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:40" (2/3) ... [2020-10-27 00:05:49,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad991bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:49, skipping insertion in model container [2020-10-27 00:05:49,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:49" (3/3) ... [2020-10-27 00:05:49,985 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2020-10-27 00:05:49,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:05:50,003 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:05:50,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:05:50,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:05:50,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:05:50,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:05:50,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:05:50,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:05:50,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:05:50,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:05:50,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:05:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:05:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 00:05:50,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:50,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:05:50,088 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash -33809726, now seen corresponding path program 1 times [2020-10-27 00:05:50,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:50,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132282778] [2020-10-27 00:05:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:50,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:50,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:50,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 00:05:50,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:50,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-27 00:05:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:05:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 00:05:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:05:51,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:51,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:51,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:51,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:51,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:05:51,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:51,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:05:51,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132282778] [2020-10-27 00:05:51,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:05:51,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:05:51,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784982116] [2020-10-27 00:05:51,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:05:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:05:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:05:51,200 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:06:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:02,856 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:06:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:06:02,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-27 00:06:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:02,889 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:06:02,889 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:06:02,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:06:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:06:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:06:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:06:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:06:03,020 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 56 [2020-10-27 00:06:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:03,022 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:06:03,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:06:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:06:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 00:06:03,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:03,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:06:03,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:06:03,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 317812258, now seen corresponding path program 1 times [2020-10-27 00:06:03,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:03,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044184225] [2020-10-27 00:06:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:03,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:04,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:04,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 00:06:04,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:04,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-27 00:06:04,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:06:04,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:06:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:06:04,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:06:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:04,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:04,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:04,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:04,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:06:04,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:04,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:04,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:06:04,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:04,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:04,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:04,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:04,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:06:04,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:04,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 00:06:04,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:06:04,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:06:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044184225] [2020-10-27 00:06:04,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:04,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:06:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603172939] [2020-10-27 00:06:04,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:06:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:04,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:06:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:06:04,808 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:06:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:20,311 INFO L93 Difference]: Finished difference Result 2944 states and 4561 transitions. [2020-10-27 00:06:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:06:20,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-27 00:06:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:20,332 INFO L225 Difference]: With dead ends: 2944 [2020-10-27 00:06:20,332 INFO L226 Difference]: Without dead ends: 1947 [2020-10-27 00:06:20,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:06:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2020-10-27 00:06:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1930. [2020-10-27 00:06:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-27 00:06:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2600 transitions. [2020-10-27 00:06:20,415 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2600 transitions. Word has length 127 [2020-10-27 00:06:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:20,418 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2600 transitions. [2020-10-27 00:06:20,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:06:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2600 transitions. [2020-10-27 00:06:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 00:06:20,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:20,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:06:20,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:06:20,426 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:20,427 INFO L82 PathProgramCache]: Analyzing trace with hash -670028817, now seen corresponding path program 1 times [2020-10-27 00:06:20,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:20,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205889742] [2020-10-27 00:06:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 00:06:21,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:06:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:21,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:21,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:21,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:21,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:21,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:06:21,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:06:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:21,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:22,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:22,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:06:22,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 00:06:22,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:06:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:06:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:06:22,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205889742] [2020-10-27 00:06:22,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:22,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:06:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589239729] [2020-10-27 00:06:22,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:06:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:06:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:06:22,414 INFO L87 Difference]: Start difference. First operand 1930 states and 2600 transitions. Second operand 8 states. [2020-10-27 00:06:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:46,113 INFO L93 Difference]: Finished difference Result 4817 states and 6646 transitions. [2020-10-27 00:06:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:06:46,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-10-27 00:06:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:46,135 INFO L225 Difference]: With dead ends: 4817 [2020-10-27 00:06:46,135 INFO L226 Difference]: Without dead ends: 2850 [2020-10-27 00:06:46,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:06:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2020-10-27 00:06:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2827. [2020-10-27 00:06:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-10-27 00:06:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3821 transitions. [2020-10-27 00:06:46,255 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3821 transitions. Word has length 130 [2020-10-27 00:06:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:46,258 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 3821 transitions. [2020-10-27 00:06:46,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:06:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3821 transitions. [2020-10-27 00:06:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 00:06:46,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:46,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:06:46,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:06:46,263 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1307701374, now seen corresponding path program 1 times [2020-10-27 00:06:46,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:46,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271679446] [2020-10-27 00:06:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:46,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:46,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 00:06:46,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:46,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 00:06:46,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:06:46,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 00:06:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:46,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:46,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:46,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:06:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:06:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:46,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:46,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:46,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:06:46,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 00:06:46,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:46,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:06:46,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:06:47,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271679446] [2020-10-27 00:06:47,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:47,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:06:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739806841] [2020-10-27 00:06:47,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:06:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:06:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:06:47,070 INFO L87 Difference]: Start difference. First operand 2827 states and 3821 transitions. Second operand 5 states. [2020-10-27 00:07:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:03,736 INFO L93 Difference]: Finished difference Result 7438 states and 10470 transitions. [2020-10-27 00:07:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:07:03,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-27 00:07:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:03,770 INFO L225 Difference]: With dead ends: 7438 [2020-10-27 00:07:03,770 INFO L226 Difference]: Without dead ends: 5050 [2020-10-27 00:07:03,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:07:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2020-10-27 00:07:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5050. [2020-10-27 00:07:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5050 states. [2020-10-27 00:07:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 6667 transitions. [2020-10-27 00:07:03,921 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 6667 transitions. Word has length 143 [2020-10-27 00:07:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:03,922 INFO L481 AbstractCegarLoop]: Abstraction has 5050 states and 6667 transitions. [2020-10-27 00:07:03,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:07:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 6667 transitions. [2020-10-27 00:07:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 00:07:03,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:03,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:07:03,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:07:03,926 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash 420174490, now seen corresponding path program 1 times [2020-10-27 00:07:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:03,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353142810] [2020-10-27 00:07:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:08,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:08,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 00:07:08,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4019 [2020-10-27 00:07:08,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:07:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:07:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:07:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:08,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:08,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:08,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:08,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:08,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:08,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:07:08,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:08,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:07:08,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:08,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:08,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:08,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:08,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 00:07:08,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:07:08,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:07:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:08,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:08,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:07:08,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:07:08,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 165 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:07:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353142810] [2020-10-27 00:07:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:09,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:07:09,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163981803] [2020-10-27 00:07:09,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:07:09,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:07:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:07:09,062 INFO L87 Difference]: Start difference. First operand 5050 states and 6667 transitions. Second operand 10 states. [2020-10-27 00:07:09,255 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:07:13,843 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:07:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:27,656 INFO L93 Difference]: Finished difference Result 12478 states and 17338 transitions. [2020-10-27 00:07:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:07:27,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218 [2020-10-27 00:07:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:27,733 INFO L225 Difference]: With dead ends: 12478 [2020-10-27 00:07:27,734 INFO L226 Difference]: Without dead ends: 7867 [2020-10-27 00:07:27,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-27 00:07:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2020-10-27 00:07:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 7839. [2020-10-27 00:07:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7839 states. [2020-10-27 00:07:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 10084 transitions. [2020-10-27 00:07:27,958 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 10084 transitions. Word has length 218 [2020-10-27 00:07:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:27,959 INFO L481 AbstractCegarLoop]: Abstraction has 7839 states and 10084 transitions. [2020-10-27 00:07:27,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:07:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 10084 transitions. [2020-10-27 00:07:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 00:07:27,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:27,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:27,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:07:27,965 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 211026128, now seen corresponding path program 1 times [2020-10-27 00:07:27,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:27,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510473403] [2020-10-27 00:07:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:28,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:28,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:28,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 00:07:33,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:33,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 00:07:33,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:07:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 00:07:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:33,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:33,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:07:33,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:33,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:33,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:33,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:33,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 00:07:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:07:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:33,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:33,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:07:33,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:07:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 00:07:33,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:33,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:07:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 129 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:07:33,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510473403] [2020-10-27 00:07:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:33,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:07:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014368857] [2020-10-27 00:07:33,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:07:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:07:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:07:33,848 INFO L87 Difference]: Start difference. First operand 7839 states and 10084 transitions. Second operand 7 states. [2020-10-27 00:07:34,675 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:07:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:51,237 INFO L93 Difference]: Finished difference Result 18060 states and 24788 transitions. [2020-10-27 00:07:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:07:51,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2020-10-27 00:07:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:51,300 INFO L225 Difference]: With dead ends: 18060 [2020-10-27 00:07:51,300 INFO L226 Difference]: Without dead ends: 10677 [2020-10-27 00:07:51,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:07:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2020-10-27 00:07:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10583. [2020-10-27 00:07:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10583 states. [2020-10-27 00:07:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10583 states to 10583 states and 14345 transitions. [2020-10-27 00:07:51,655 INFO L78 Accepts]: Start accepts. Automaton has 10583 states and 14345 transitions. Word has length 229 [2020-10-27 00:07:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:51,656 INFO L481 AbstractCegarLoop]: Abstraction has 10583 states and 14345 transitions. [2020-10-27 00:07:51,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:07:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 10583 states and 14345 transitions. [2020-10-27 00:07:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-27 00:07:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:51,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:51,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:07:51,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -480193547, now seen corresponding path program 1 times [2020-10-27 00:07:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:51,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58607975] [2020-10-27 00:07:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:51,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:55,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:55,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-27 00:07:55,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:55,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3832 [2020-10-27 00:07:55,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:07:55,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:07:55,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:07:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:55,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:55,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:55,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:07:55,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:56,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:56,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:07:56,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:56,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 00:07:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:07:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:56,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-27 00:07:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:56,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:56,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:56,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:07:56,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:07:56,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:07:56,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:07:56,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58607975] [2020-10-27 00:07:56,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:56,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:07:56,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000195482] [2020-10-27 00:07:56,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:07:56,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:07:56,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:07:56,478 INFO L87 Difference]: Start difference. First operand 10583 states and 14345 transitions. Second operand 7 states. [2020-10-27 00:08:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:15,431 INFO L93 Difference]: Finished difference Result 22768 states and 31340 transitions. [2020-10-27 00:08:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:08:15,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-10-27 00:08:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:15,487 INFO L225 Difference]: With dead ends: 22768 [2020-10-27 00:08:15,488 INFO L226 Difference]: Without dead ends: 12628 [2020-10-27 00:08:15,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:08:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12628 states. [2020-10-27 00:08:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 12537. [2020-10-27 00:08:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12537 states. [2020-10-27 00:08:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 16944 transitions. [2020-10-27 00:08:15,835 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 16944 transitions. Word has length 236 [2020-10-27 00:08:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:15,835 INFO L481 AbstractCegarLoop]: Abstraction has 12537 states and 16944 transitions. [2020-10-27 00:08:15,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:08:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 16944 transitions. [2020-10-27 00:08:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-27 00:08:15,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:15,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:15,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:08:15,841 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1981981249, now seen corresponding path program 1 times [2020-10-27 00:08:15,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:15,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628201903] [2020-10-27 00:08:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:15,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:19,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3484 [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 00:08:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:08:19,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-27 00:08:19,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:19,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:19,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:19,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:19,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:08:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:19,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:19,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:08:19,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 00:08:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:20,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:20,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:08:20,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 64 proven. 99 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 00:08:20,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628201903] [2020-10-27 00:08:20,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:20,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:08:20,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860143129] [2020-10-27 00:08:20,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:08:20,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:08:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:08:20,726 INFO L87 Difference]: Start difference. First operand 12537 states and 16944 transitions. Second operand 9 states. [2020-10-27 00:08:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:51,404 INFO L93 Difference]: Finished difference Result 28787 states and 41630 transitions. [2020-10-27 00:08:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 00:08:51,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 242 [2020-10-27 00:08:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:51,468 INFO L225 Difference]: With dead ends: 28787 [2020-10-27 00:08:51,468 INFO L226 Difference]: Without dead ends: 16691 [2020-10-27 00:08:51,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:08:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16691 states. [2020-10-27 00:08:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16691 to 16631. [2020-10-27 00:08:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16631 states. [2020-10-27 00:08:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16631 states to 16631 states and 23566 transitions. [2020-10-27 00:08:51,929 INFO L78 Accepts]: Start accepts. Automaton has 16631 states and 23566 transitions. Word has length 242 [2020-10-27 00:08:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:51,930 INFO L481 AbstractCegarLoop]: Abstraction has 16631 states and 23566 transitions. [2020-10-27 00:08:51,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:08:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 16631 states and 23566 transitions. [2020-10-27 00:08:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 00:08:51,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:51,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:51,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:08:51,935 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash 853866587, now seen corresponding path program 1 times [2020-10-27 00:08:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:51,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859936715] [2020-10-27 00:08:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:52,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:08:52,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 00:08:52,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:52,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:52,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:52,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:52,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 00:08:52,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:52,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:52,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:52,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:52,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:52,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:08:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:52,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:52,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:52,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 00:08:52,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 00:08:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:08:53,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859936715] [2020-10-27 00:08:53,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:53,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:08:53,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49488376] [2020-10-27 00:08:53,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:08:53,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:08:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:08:53,055 INFO L87 Difference]: Start difference. First operand 16631 states and 23566 transitions. Second operand 7 states. [2020-10-27 00:08:58,470 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:09:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:09:15,010 INFO L93 Difference]: Finished difference Result 42099 states and 62887 transitions. [2020-10-27 00:09:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:09:15,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 246 [2020-10-27 00:09:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:09:15,114 INFO L225 Difference]: With dead ends: 42099 [2020-10-27 00:09:15,115 INFO L226 Difference]: Without dead ends: 25909 [2020-10-27 00:09:15,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:09:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25909 states. [2020-10-27 00:09:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25909 to 25776. [2020-10-27 00:09:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25776 states. [2020-10-27 00:09:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25776 states to 25776 states and 35978 transitions. [2020-10-27 00:09:15,899 INFO L78 Accepts]: Start accepts. Automaton has 25776 states and 35978 transitions. Word has length 246 [2020-10-27 00:09:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:09:15,899 INFO L481 AbstractCegarLoop]: Abstraction has 25776 states and 35978 transitions. [2020-10-27 00:09:15,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:09:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 25776 states and 35978 transitions. [2020-10-27 00:09:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-27 00:09:15,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:15,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:09:15,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:09:15,908 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash 856730708, now seen corresponding path program 1 times [2020-10-27 00:09:15,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:15,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638098589] [2020-10-27 00:09:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:16,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:16,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-27 00:09:16,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:16,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-27 00:09:16,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:09:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 00:09:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:09:16,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:16,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:16,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:16,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:09:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:16,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:09:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:16,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:16,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:09:16,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:09:16,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:16,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:09:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:16,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:16,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:09:16,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:16,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 00:09:16,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 00:09:16,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:16,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:09:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:16,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:16,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:09:16,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:09:16,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 285 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-27 00:09:17,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638098589] [2020-10-27 00:09:17,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:09:17,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:09:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585423294] [2020-10-27 00:09:17,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:09:17,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:09:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:09:17,044 INFO L87 Difference]: Start difference. First operand 25776 states and 35978 transitions. Second operand 7 states. [2020-10-27 00:09:17,914 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68