/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:17:57,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:17:57,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:17:57,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:17:57,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:17:57,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:17:57,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:17:57,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:17:57,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:17:57,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:17:57,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:17:57,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:17:57,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:17:57,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:17:57,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:17:57,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:17:57,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:17:57,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:17:57,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:17:57,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:17:57,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:17:57,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:17:57,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:17:57,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:17:57,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:17:57,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:17:57,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:17:57,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:17:57,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:17:57,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:17:57,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:17:57,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:17:57,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:17:57,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:17:57,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:17:57,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:17:57,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:17:57,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:17:57,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:17:57,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:17:57,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:17:57,992 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 20:17:58,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:17:58,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:17:58,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:17:58,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:17:58,060 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:17:58,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:17:58,060 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:17:58,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:17:58,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:17:58,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:17:58,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:17:58,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:17:58,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:17:58,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:17:58,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:17:58,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:17:58,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:17:58,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:17:58,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:17:58,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:17:58,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:17:58,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:17:58,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:17:58,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:17:58,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:17:58,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:17:58,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:17:58,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:17:58,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:17:58,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:17:58,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:17:58,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:17:58,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:17:58,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:17:58,536 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:17:58,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2020-10-27 20:17:58,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b52d9f9b/5281f87dd61143f29269843a23f317d6/FLAGaa29a5bd2 [2020-10-27 20:17:59,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:17:59,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2020-10-27 20:17:59,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b52d9f9b/5281f87dd61143f29269843a23f317d6/FLAGaa29a5bd2 [2020-10-27 20:17:59,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b52d9f9b/5281f87dd61143f29269843a23f317d6 [2020-10-27 20:17:59,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:17:59,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:17:59,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:17:59,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:17:59,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:17:59,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:17:59" (1/1) ... [2020-10-27 20:17:59,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7afc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:17:59, skipping insertion in model container [2020-10-27 20:17:59,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:17:59" (1/1) ... [2020-10-27 20:17:59,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:17:59,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:17:59,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:17:59,949 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:17:59,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:18:00,008 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:18:00,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00 WrapperNode [2020-10-27 20:18:00,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:18:00,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:18:00,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:18:00,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:18:00,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (1/1) ... [2020-10-27 20:18:00,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:18:00,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:18:00,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:18:00,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:18:00,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (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 20:18:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:18:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:18:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:18:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:18:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:18:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:18:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:18:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:18:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:18:00,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:18:00,741 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 20:18:00,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:18:00 BoogieIcfgContainer [2020-10-27 20:18:00,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:18:00,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:18:00,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:18:00,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:18:00,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:17:59" (1/3) ... [2020-10-27 20:18:00,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314225b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:18:00, skipping insertion in model container [2020-10-27 20:18:00,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:18:00" (2/3) ... [2020-10-27 20:18:00,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314225b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:18:00, skipping insertion in model container [2020-10-27 20:18:00,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:18:00" (3/3) ... [2020-10-27 20:18:00,754 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2020-10-27 20:18:00,771 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:18:00,782 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:18:00,803 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:18:00,851 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:18:00,851 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:18:00,851 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:18:00,851 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:18:00,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:18:00,852 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:18:00,852 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:18:00,852 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:18:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-10-27 20:18:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:18:00,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:00,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:00,893 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1744602350, now seen corresponding path program 1 times [2020-10-27 20:18:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331725411] [2020-10-27 20:18:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:01,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:01,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:18:01,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:01,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-27 20:18:01,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:18:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:18:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:18:01,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:18:01,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:01,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:01,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:01,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:18:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:01,683 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 20:18:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331725411] [2020-10-27 20:18:01,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:01,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:18:01,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064395569] [2020-10-27 20:18:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:18:01,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:18:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:18:01,714 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 5 states. [2020-10-27 20:18:02,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:02,208 INFO L93 Difference]: Finished difference Result 131 states and 201 transitions. [2020-10-27 20:18:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:18:02,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 20:18:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:02,222 INFO L225 Difference]: With dead ends: 131 [2020-10-27 20:18:02,222 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 20:18:02,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 20:18:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2020-10-27 20:18:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:18:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2020-10-27 20:18:02,279 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 13 [2020-10-27 20:18:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:02,280 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2020-10-27 20:18:02,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:18:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2020-10-27 20:18:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:18:02,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:02,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:02,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:18:02,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1842893151, now seen corresponding path program 1 times [2020-10-27 20:18:02,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:02,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615208236] [2020-10-27 20:18:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:02,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:02,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:18:02,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:02,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 20:18:02,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:18:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:18:02,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:18:02,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:02,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:02,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:02,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:02,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:02,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:18:02,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:02,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:02,566 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 20:18:02,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615208236] [2020-10-27 20:18:02,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:02,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:18:02,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862027921] [2020-10-27 20:18:02,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:18:02,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:18:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:18:02,571 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 5 states. [2020-10-27 20:18:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:02,930 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2020-10-27 20:18:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:18:02,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 20:18:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:02,932 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:18:02,933 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:18:02,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:18:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2020-10-27 20:18:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:18:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2020-10-27 20:18:02,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 13 [2020-10-27 20:18:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:02,948 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2020-10-27 20:18:02,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:18:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2020-10-27 20:18:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:18:02,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:02,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:02,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:18:02,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash -9522221, now seen corresponding path program 1 times [2020-10-27 20:18:02,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:02,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250842985] [2020-10-27 20:18:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:02,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:03,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:18:03,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:18:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-27 20:18:03,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:03,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:03,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:03,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:18:03,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:18:03,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:03,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:03,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:03,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:18:03,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:03,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:03,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:03,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:03,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:03,473 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 20:18:03,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250842985] [2020-10-27 20:18:03,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:03,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:03,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684558022] [2020-10-27 20:18:03,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:03,476 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand 7 states. [2020-10-27 20:18:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:03,722 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-10-27 20:18:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:18:03,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-27 20:18:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:03,724 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:18:03,724 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:18:03,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:18:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:18:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-27 20:18:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:18:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-10-27 20:18:03,735 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 16 [2020-10-27 20:18:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:03,735 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-10-27 20:18:03,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-10-27 20:18:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:18:03,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:03,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:03,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:18:03,737 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash -918022915, now seen corresponding path program 1 times [2020-10-27 20:18:03,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:03,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594832779] [2020-10-27 20:18:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:03,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:03,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:18:03,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:18:03,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 20:18:03,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:18:03,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:04,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:04,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:04,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:04,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:04,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:18:04,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:04,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:04,053 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 20:18:04,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594832779] [2020-10-27 20:18:04,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:04,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:04,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271976683] [2020-10-27 20:18:04,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:04,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:04,056 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 7 states. [2020-10-27 20:18:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:04,267 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-27 20:18:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:18:04,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-27 20:18:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:04,268 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:18:04,268 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:18:04,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:18:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:18:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-27 20:18:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:18:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2020-10-27 20:18:04,277 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 16 [2020-10-27 20:18:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:04,278 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2020-10-27 20:18:04,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2020-10-27 20:18:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:18:04,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:04,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:04,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:18:04,280 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash -295234700, now seen corresponding path program 1 times [2020-10-27 20:18:04,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:04,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680871596] [2020-10-27 20:18:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:04,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:04,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:04,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:04,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:18:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:18:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:04,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:04,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:04,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:04,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:04,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:04,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:18:04,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:04,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:04,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:04,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:18:04,803 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 20:18:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680871596] [2020-10-27 20:18:04,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:04,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:18:04,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218769784] [2020-10-27 20:18:04,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:18:04,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:04,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:18:04,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:18:04,809 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand 5 states. [2020-10-27 20:18:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:04,966 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-10-27 20:18:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:18:04,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:18:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:04,969 INFO L225 Difference]: With dead ends: 57 [2020-10-27 20:18:04,969 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 20:18:04,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:18:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 20:18:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 20:18:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:18:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2020-10-27 20:18:04,977 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 17 [2020-10-27 20:18:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:04,977 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2020-10-27 20:18:04,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:18:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2020-10-27 20:18:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:18:04,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:04,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:04,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:18:04,979 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1619790700, now seen corresponding path program 1 times [2020-10-27 20:18:04,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:04,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977544300] [2020-10-27 20:18:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:04,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:05,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:05,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:18:05,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 20:18:05,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:18:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:05,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:05,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:05,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:05,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:05,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:18:05,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:05,380 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 20:18:05,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977544300] [2020-10-27 20:18:05,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:05,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:18:05,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598786631] [2020-10-27 20:18:05,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:18:05,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:18:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:18:05,383 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand 6 states. [2020-10-27 20:18:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:05,692 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2020-10-27 20:18:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:18:05,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:18:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:05,695 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:18:05,696 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:18:05,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:18:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2020-10-27 20:18:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:18:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-10-27 20:18:05,704 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 17 [2020-10-27 20:18:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:05,705 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-10-27 20:18:05,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:18:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-10-27 20:18:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:18:05,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:05,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:05,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:18:05,711 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1619360048, now seen corresponding path program 1 times [2020-10-27 20:18:05,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:05,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521369903] [2020-10-27 20:18:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:05,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:05,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:05,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:18:05,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:18:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:06,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:06,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:06,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:06,036 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 20:18:06,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521369903] [2020-10-27 20:18:06,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:06,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198585685] [2020-10-27 20:18:06,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:06,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:06,040 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 7 states. [2020-10-27 20:18:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:06,328 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-10-27 20:18:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:18:06,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-27 20:18:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:06,331 INFO L225 Difference]: With dead ends: 77 [2020-10-27 20:18:06,331 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 20:18:06,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:18:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 20:18:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-10-27 20:18:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:18:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-27 20:18:06,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 17 [2020-10-27 20:18:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:06,349 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-27 20:18:06,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-27 20:18:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:18:06,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:06,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:06,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:18:06,351 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1606092420, now seen corresponding path program 1 times [2020-10-27 20:18:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:06,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228988274] [2020-10-27 20:18:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:06,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:18:06,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:18:06,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 20:18:06,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:18:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:18:06,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:18:06,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:06,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:06,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:06,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:18:06,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:06,706 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 20:18:06,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228988274] [2020-10-27 20:18:06,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:06,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:18:06,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724821177] [2020-10-27 20:18:06,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:18:06,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:18:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:18:06,711 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 5 states. [2020-10-27 20:18:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:06,878 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-27 20:18:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:18:06,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 20:18:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:06,879 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:18:06,879 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:18:06,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:18:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-27 20:18:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:18:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-27 20:18:06,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 17 [2020-10-27 20:18:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:06,895 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-27 20:18:06,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:18:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-27 20:18:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:18:06,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:06,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:06,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:18:06,897 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -121586766, now seen corresponding path program 1 times [2020-10-27 20:18:06,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:06,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706886768] [2020-10-27 20:18:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:07,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:07,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:18:07,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 20:18:07,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:18:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:07,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:07,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:07,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:07,182 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 20:18:07,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706886768] [2020-10-27 20:18:07,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:07,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:07,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813627411] [2020-10-27 20:18:07,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:07,185 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2020-10-27 20:18:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:07,589 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2020-10-27 20:18:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:18:07,590 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:18:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:07,591 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:18:07,591 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:18:07,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:18:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:18:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2020-10-27 20:18:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:18:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-27 20:18:07,599 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 18 [2020-10-27 20:18:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:07,599 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-27 20:18:07,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-27 20:18:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:18:07,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:07,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:07,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:18:07,601 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -73872744, now seen corresponding path program 1 times [2020-10-27 20:18:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:07,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924444766] [2020-10-27 20:18:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:07,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:07,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:07,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:07,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:18:07,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:07,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 20:18:07,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:07,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:18:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:18:07,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:07,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:07,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:07,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:07,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:18:07,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:07,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:07,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:07,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:07,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:07,877 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 20:18:07,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924444766] [2020-10-27 20:18:07,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:07,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323810355] [2020-10-27 20:18:07,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:07,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:07,881 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 7 states. [2020-10-27 20:18:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:08,223 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2020-10-27 20:18:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:18:08,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:18:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:08,225 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:18:08,225 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:18:08,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:18:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:18:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2020-10-27 20:18:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:18:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-27 20:18:08,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2020-10-27 20:18:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:08,246 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-27 20:18:08,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-27 20:18:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:18:08,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:08,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:08,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:18:08,248 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1326041788, now seen corresponding path program 1 times [2020-10-27 20:18:08,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:08,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267726718] [2020-10-27 20:18:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:08,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:08,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:08,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:08,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:18:08,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:08,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 20:18:08,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:18:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:18:08,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:18:08,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:08,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:08,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:08,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:08,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:08,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:18:08,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:08,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:08,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:08,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:08,614 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 20:18:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267726718] [2020-10-27 20:18:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:18:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078731159] [2020-10-27 20:18:08,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:18:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:18:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:08,617 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 8 states. [2020-10-27 20:18:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:08,908 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-27 20:18:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:18:08,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-27 20:18:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:08,910 INFO L225 Difference]: With dead ends: 75 [2020-10-27 20:18:08,910 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 20:18:08,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:18:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 20:18:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2020-10-27 20:18:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:18:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-27 20:18:08,919 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 18 [2020-10-27 20:18:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:08,919 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-27 20:18:08,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:18:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-27 20:18:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:18:08,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:08,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:08,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:18:08,921 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1339401734, now seen corresponding path program 1 times [2020-10-27 20:18:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:08,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37820878] [2020-10-27 20:18:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:08,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:08,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:09,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:09,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:18:09,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:09,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 20:18:09,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:18:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:18:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:18:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:09,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:09,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:09,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:09,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:09,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:18:09,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:09,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:09,242 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 20:18:09,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37820878] [2020-10-27 20:18:09,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:09,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:18:09,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975308911] [2020-10-27 20:18:09,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:18:09,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:18:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:09,245 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 8 states. [2020-10-27 20:18:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:09,543 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-10-27 20:18:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:18:09,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-27 20:18:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:09,545 INFO L225 Difference]: With dead ends: 67 [2020-10-27 20:18:09,545 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:18:09,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:18:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:18:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-10-27 20:18:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:18:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-27 20:18:09,554 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 18 [2020-10-27 20:18:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:09,554 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-27 20:18:09,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:18:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-27 20:18:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:18:09,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:09,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:09,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:18:09,556 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash 568075593, now seen corresponding path program 1 times [2020-10-27 20:18:09,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:09,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616112777] [2020-10-27 20:18:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:09,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:09,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:09,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:18:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 20:18:09,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:18:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:18:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:09,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:09,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:09,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:09,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:09,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:18:09,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:09,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:09,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:09,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:09,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:18:09,863 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 20:18:09,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616112777] [2020-10-27 20:18:09,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:09,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:18:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584172631] [2020-10-27 20:18:09,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:18:09,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:18:09,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:18:09,867 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 6 states. [2020-10-27 20:18:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:10,060 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-27 20:18:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:18:10,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 20:18:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:10,062 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:18:10,062 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:18:10,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:18:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-27 20:18:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:18:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-27 20:18:10,073 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 19 [2020-10-27 20:18:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:10,074 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-27 20:18:10,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:18:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-27 20:18:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:18:10,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:10,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:10,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:18:10,077 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 525748162, now seen corresponding path program 1 times [2020-10-27 20:18:10,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:10,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971789654] [2020-10-27 20:18:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:10,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:10,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:10,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:10,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:18:10,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 20:18:10,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:18:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:18:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:18:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:18:10,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:10,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:10,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:10,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:10,522 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 20:18:10,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971789654] [2020-10-27 20:18:10,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:10,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:18:10,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992888985] [2020-10-27 20:18:10,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:18:10,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:18:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:10,527 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-10-27 20:18:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:10,753 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-27 20:18:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:18:10,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 20:18:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:10,754 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:18:10,754 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:18:10,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:18:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:18:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-27 20:18:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:18:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 20:18:10,762 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 19 [2020-10-27 20:18:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:10,765 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 20:18:10,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:18:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 20:18:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:18:10,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:10,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:18:10,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:18:10,768 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2004919734, now seen corresponding path program 1 times [2020-10-27 20:18:10,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:10,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256151069] [2020-10-27 20:18:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:11,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:11,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:18:11,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:11,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 20:18:11,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:18:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:18:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:18:11,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:11,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:11,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:11,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:11,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:11,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:18:11,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:11,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:11,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:11,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:11,143 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 20:18:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256151069] [2020-10-27 20:18:11,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:11,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:18:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787268143] [2020-10-27 20:18:11,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:18:11,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:18:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:11,145 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 20:18:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:11,334 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-27 20:18:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:18:11,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 20:18:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:11,335 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:18:11,335 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:18:11,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:18:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:18:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 20:18:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:18:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-27 20:18:11,344 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2020-10-27 20:18:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:11,344 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-27 20:18:11,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:18:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-27 20:18:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:18:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:11,346 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] [2020-10-27 20:18:11,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:18:11,347 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash 430467162, now seen corresponding path program 1 times [2020-10-27 20:18:11,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:11,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509824837] [2020-10-27 20:18:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:11,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:11,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:18:11,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:18:11,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 20:18:11,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:18:11,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:18:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:18:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:11,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:11,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:11,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:11,728 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 20:18:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509824837] [2020-10-27 20:18:11,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:11,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 20:18:11,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108740286] [2020-10-27 20:18:11,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:18:11,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:18:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:18:11,734 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-10-27 20:18:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:11,977 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-27 20:18:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:18:11,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 20:18:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:11,979 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:18:11,979 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:18:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:18:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:18:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-27 20:18:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:18:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-27 20:18:11,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2020-10-27 20:18:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:11,989 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-27 20:18:11,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:18:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-27 20:18:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:18:11,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:11,990 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] [2020-10-27 20:18:11,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:18:11,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1563061082, now seen corresponding path program 1 times [2020-10-27 20:18:11,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:11,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564044123] [2020-10-27 20:18:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:12,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:12,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:12,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:12,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:13,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:18:13,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:18:13,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-27 20:18:13,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:13,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:18:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:18:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:18:13,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:13,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:13,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:13,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:18:13,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:13,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:13,132 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 20:18:13,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564044123] [2020-10-27 20:18:13,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:13,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:18:13,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38035094] [2020-10-27 20:18:13,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:18:13,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:18:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:18:13,137 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-27 20:18:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:13,276 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 20:18:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:18:13,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:18:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:13,277 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:18:13,278 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:18:13,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:18:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:18:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-27 20:18:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:18:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 20:18:13,284 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2020-10-27 20:18:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:13,284 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 20:18:13,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:18:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 20:18:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:18:13,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:18:13,285 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] [2020-10-27 20:18:13,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:18:13,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:18:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:18:13,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1210271979, now seen corresponding path program 1 times [2020-10-27 20:18:13,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:18:13,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673754592] [2020-10-27 20:18:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:18:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:13,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:18:13,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:18:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-27 20:18:13,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:18:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:18:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:18:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:18:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:18:13,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:18:13,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:18:13,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:18:13,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:18:13,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:18:13,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:18:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:18:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:18:13,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:18:13,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:18:13,975 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 20:18:13,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673754592] [2020-10-27 20:18:13,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:18:13,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:18:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80005000] [2020-10-27 20:18:13,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:18:13,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:18:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:18:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:18:13,983 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-10-27 20:18:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:18:14,070 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-27 20:18:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:18:14,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 20:18:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:18:14,071 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:18:14,071 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:18:14,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:18:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:18:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:18:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:18:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:18:14,072 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-27 20:18:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:18:14,073 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:18:14,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:18:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:18:14,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:18:14,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:18:14,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:18:14,476 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-27 20:18:14,477 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-27 20:18:14,477 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-27 20:18:14,478 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-27 20:18:14,478 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:18:14,478 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= ~__tmp_383_0~0 |old(~__tmp_383_0~0)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= ~__return_305~0 |old(~__return_305~0)|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~__tmp_259_0~0 |old(~__tmp_259_0~0)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-10-27 20:18:14,478 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:18:14,478 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:18:14,478 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:18:14,478 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L270 CegarLoopResult]: At program point L126(line 126) the Hoare annotation is: false [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point L126-1(line 126) no Hoare annotation was computed. [2020-10-27 20:18:14,479 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 402) no Hoare annotation was computed. [2020-10-27 20:18:14,480 INFO L270 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-10-27 20:18:14,480 INFO L274 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-10-27 20:18:14,480 INFO L270 CegarLoopResult]: At program point L176(line 176) the Hoare annotation is: false [2020-10-27 20:18:14,480 INFO L274 CegarLoopResult]: For program point L176-1(line 176) no Hoare annotation was computed. [2020-10-27 20:18:14,480 INFO L270 CegarLoopResult]: At program point L366(line 366) the Hoare annotation is: false [2020-10-27 20:18:14,480 INFO L270 CegarLoopResult]: At program point L333(line 333) the Hoare annotation is: false [2020-10-27 20:18:14,480 INFO L274 CegarLoopResult]: For program point L366-1(line 366) no Hoare annotation was computed. [2020-10-27 20:18:14,481 INFO L274 CegarLoopResult]: For program point L333-1(line 333) no Hoare annotation was computed. [2020-10-27 20:18:14,481 INFO L274 CegarLoopResult]: For program point L234(lines 234 242) no Hoare annotation was computed. [2020-10-27 20:18:14,482 INFO L274 CegarLoopResult]: For program point L152(lines 152 160) no Hoare annotation was computed. [2020-10-27 20:18:14,482 INFO L270 CegarLoopResult]: At program point L309(line 309) the Hoare annotation is: false [2020-10-27 20:18:14,482 INFO L274 CegarLoopResult]: For program point L20(lines 20 401) no Hoare annotation was computed. [2020-10-27 20:18:14,482 INFO L274 CegarLoopResult]: For program point L276(lines 276 391) no Hoare annotation was computed. [2020-10-27 20:18:14,483 INFO L274 CegarLoopResult]: For program point L309-1(line 309) no Hoare annotation was computed. [2020-10-27 20:18:14,483 INFO L274 CegarLoopResult]: For program point L70(lines 70 94) no Hoare annotation was computed. [2020-10-27 20:18:14,483 INFO L270 CegarLoopResult]: At program point L384(lines 282 391) the Hoare annotation is: (and (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (not (= main_~__VERIFIER_assert__cond~13 0)) (<= 0 main_~main__t~0)) [2020-10-27 20:18:14,483 INFO L270 CegarLoopResult]: At program point L351(lines 32 395) the Hoare annotation is: (and (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (or (<= 1 main_~main__t~0) (= main_~__VERIFIER_assert__cond~0 1)) (<= 0 main_~main__t~0)) [2020-10-27 20:18:14,483 INFO L274 CegarLoopResult]: For program point L186(lines 186 196) no Hoare annotation was computed. [2020-10-27 20:18:14,483 INFO L274 CegarLoopResult]: For program point L376(lines 376 385) no Hoare annotation was computed. [2020-10-27 20:18:14,484 INFO L274 CegarLoopResult]: For program point L343(lines 343 352) no Hoare annotation was computed. [2020-10-27 20:18:14,484 INFO L274 CegarLoopResult]: For program point L112(lines 112 203) no Hoare annotation was computed. [2020-10-27 20:18:14,484 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 402) no Hoare annotation was computed. [2020-10-27 20:18:14,484 INFO L270 CegarLoopResult]: At program point L236(line 236) the Hoare annotation is: false [2020-10-27 20:18:14,484 INFO L274 CegarLoopResult]: For program point L236-1(line 236) no Hoare annotation was computed. [2020-10-27 20:18:14,484 INFO L270 CegarLoopResult]: At program point L195(lines 56 253) the Hoare annotation is: (and (<= 1 main_~main__t~0) (<= main_~main__t~0 main_~main__tagbuf_len~0)) [2020-10-27 20:18:14,484 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 15 402) the Hoare annotation is: (and (= |old(~__tmp_259_0~0)| ~__tmp_259_0~0) (= |old(~__return_305~0)| ~__return_305~0) (= |old(~__tmp_383_0~0)| ~__tmp_383_0~0)) [2020-10-27 20:18:14,485 INFO L270 CegarLoopResult]: At program point L154(line 154) the Hoare annotation is: false [2020-10-27 20:18:14,485 INFO L274 CegarLoopResult]: For program point L154-1(line 154) no Hoare annotation was computed. [2020-10-27 20:18:14,485 INFO L270 CegarLoopResult]: At program point L278(line 278) the Hoare annotation is: false [2020-10-27 20:18:14,485 INFO L274 CegarLoopResult]: For program point L278-1(line 278) no Hoare annotation was computed. [2020-10-27 20:18:14,485 INFO L274 CegarLoopResult]: For program point L105(lines 105 209) no Hoare annotation was computed. [2020-10-27 20:18:14,485 INFO L270 CegarLoopResult]: At program point L72(line 72) the Hoare annotation is: false [2020-10-27 20:18:14,485 INFO L274 CegarLoopResult]: For program point L39(lines 39 255) no Hoare annotation was computed. [2020-10-27 20:18:14,486 INFO L274 CegarLoopResult]: For program point L72-1(line 72) no Hoare annotation was computed. [2020-10-27 20:18:14,486 INFO L274 CegarLoopResult]: For program point L295(lines 295 317) no Hoare annotation was computed. [2020-10-27 20:18:14,486 INFO L270 CegarLoopResult]: At program point L188(line 188) the Hoare annotation is: false [2020-10-27 20:18:14,486 INFO L274 CegarLoopResult]: For program point L188-1(line 188) no Hoare annotation was computed. [2020-10-27 20:18:14,486 INFO L270 CegarLoopResult]: At program point L378(line 378) the Hoare annotation is: false [2020-10-27 20:18:14,487 INFO L270 CegarLoopResult]: At program point L345(line 345) the Hoare annotation is: false [2020-10-27 20:18:14,487 INFO L274 CegarLoopResult]: For program point L378-1(line 378) no Hoare annotation was computed. [2020-10-27 20:18:14,487 INFO L274 CegarLoopResult]: For program point L345-1(line 345) no Hoare annotation was computed. [2020-10-27 20:18:14,487 INFO L270 CegarLoopResult]: At program point L114(line 114) the Hoare annotation is: false [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L114-1(line 114) no Hoare annotation was computed. [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L32(lines 32 395) no Hoare annotation was computed. [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L288(lines 288 390) no Hoare annotation was computed. [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L222(lines 222 244) no Hoare annotation was computed. [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L24(lines 24 396) no Hoare annotation was computed. [2020-10-27 20:18:14,488 INFO L274 CegarLoopResult]: For program point L82(lines 82 92) no Hoare annotation was computed. [2020-10-27 20:18:14,489 INFO L274 CegarLoopResult]: For program point L140(lines 140 162) no Hoare annotation was computed. [2020-10-27 20:18:14,489 INFO L270 CegarLoopResult]: At program point L297(line 297) the Hoare annotation is: false [2020-10-27 20:18:14,489 INFO L274 CegarLoopResult]: For program point L297-1(line 297) no Hoare annotation was computed. [2020-10-27 20:18:14,489 INFO L274 CegarLoopResult]: For program point L124(lines 124 201) no Hoare annotation was computed. [2020-10-27 20:18:14,489 INFO L277 CegarLoopResult]: At program point L314(lines 32 395) the Hoare annotation is: true [2020-10-27 20:18:14,489 INFO L274 CegarLoopResult]: For program point L215(lines 215 250) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L50(lines 50 253) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L174(lines 174 198) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L364(lines 364 387) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L331(lines 331 354) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L265(lines 265 393) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L274 CegarLoopResult]: For program point L133(lines 133 200) no Hoare annotation was computed. [2020-10-27 20:18:14,490 INFO L270 CegarLoopResult]: At program point L224(line 224) the Hoare annotation is: false [2020-10-27 20:18:14,491 INFO L274 CegarLoopResult]: For program point L224-1(line 224) no Hoare annotation was computed. [2020-10-27 20:18:14,491 INFO L270 CegarLoopResult]: At program point L249(lines 101 251) the Hoare annotation is: (and (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (<= 1 main_~main__t~0)) [2020-10-27 20:18:14,491 INFO L270 CegarLoopResult]: At program point L84(line 84) the Hoare annotation is: false [2020-10-27 20:18:14,491 INFO L274 CegarLoopResult]: For program point L84-1(line 84) no Hoare annotation was computed. [2020-10-27 20:18:14,491 INFO L274 CegarLoopResult]: For program point L307(lines 307 315) no Hoare annotation was computed. [2020-10-27 20:18:14,491 INFO L270 CegarLoopResult]: At program point L142(line 142) the Hoare annotation is: false [2020-10-27 20:18:14,492 INFO L274 CegarLoopResult]: For program point L142-1(line 142) no Hoare annotation was computed. [2020-10-27 20:18:14,492 INFO L274 CegarLoopResult]: For program point L101(lines 101 251) no Hoare annotation was computed. [2020-10-27 20:18:14,492 INFO L274 CegarLoopResult]: For program point L324(lines 324 389) no Hoare annotation was computed. [2020-10-27 20:18:14,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:18:14 BoogieIcfgContainer [2020-10-27 20:18:14,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:18:14,528 INFO L168 Benchmark]: Toolchain (without parser) took 14901.21 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 126.5 MB in the beginning and 204.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 86.3 MB. Max. memory is 8.0 GB. [2020-10-27 20:18:14,530 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:18:14,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 113.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:18:14,537 INFO L168 Benchmark]: Boogie Preprocessor took 54.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 112.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:18:14,540 INFO L168 Benchmark]: RCFGBuilder took 677.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.1 MB in the beginning and 123.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:18:14,541 INFO L168 Benchmark]: TraceAbstraction took 13777.69 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 123.0 MB in the beginning and 204.5 MB in the end (delta: -81.4 MB). Peak memory consumption was 82.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:18:14,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 379.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 113.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 112.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 677.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.1 MB in the beginning and 123.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13777.69 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 123.0 MB in the beginning and 204.5 MB in the end (delta: -81.4 MB). Peak memory consumption was 82.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 <= main__t && main__t <= main__tagbuf_len - InvariantResult [Line: 101]: Loop Invariant Derived loop invariant: main__t + 1 <= main__tagbuf_len && 1 <= main__t - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (main__t + 1 <= main__tagbuf_len && (1 <= main__t || __VERIFIER_assert__cond == 1)) && 0 <= main__t - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 282]: Loop Invariant Derived loop invariant: (main__t + 1 <= main__tagbuf_len && !(__VERIFIER_assert__cond == 0)) && 0 <= main__t - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 88 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 18, TraceHistogramMax: 1, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 841 SDtfs, 1651 SDslu, 1160 SDs, 0 SdLazy, 2190 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 282 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 45 PreInvPairs, 48 NumberOfFragments, 120 HoareAnnotationTreeSize, 45 FomulaSimplifications, 59025 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 28 FomulaSimplificationsInter, 237 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 318 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 23364 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...