/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:37:53,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:37:53,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:37:53,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:37:53,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:37:53,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:37:53,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:37:53,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:37:53,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:37:53,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:37:53,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:37:53,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:37:53,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:37:53,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:37:53,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:37:53,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:37:53,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:37:53,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:37:53,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:37:53,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:37:53,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:37:53,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:37:53,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:37:53,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:37:53,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:37:53,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:37:53,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:37:53,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:37:53,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:37:53,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:37:53,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:37:53,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:37:53,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:37:53,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:37:53,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:37:53,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:37:53,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:37:53,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:37:53,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:37:53,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:37:53,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:37:53,997 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 01:37:54,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:37:54,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:37:54,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:37:54,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:37:54,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:37:54,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:37:54,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:37:54,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:37:54,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:37:54,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:37:54,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:37:54,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:37:54,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:37:54,041 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:37:54,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:37:54,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:37:54,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:37:54,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:37:54,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:37:54,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:37:54,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:37:54,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:37:54,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:37:54,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:37:54,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:37:54,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:37:54,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:37:54,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:37:54,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:37:54,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:37:54,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:37:54,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:37:54,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:37:54,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:37:54,496 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:37:54,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-10-27 01:37:54,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ff6e754/d3ba13805f9a45a79e4b7d722b2cf71e/FLAG53dabfe6d [2020-10-27 01:37:55,386 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:37:55,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-10-27 01:37:55,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ff6e754/d3ba13805f9a45a79e4b7d722b2cf71e/FLAG53dabfe6d [2020-10-27 01:37:55,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ff6e754/d3ba13805f9a45a79e4b7d722b2cf71e [2020-10-27 01:37:55,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:37:55,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:37:55,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:37:55,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:37:55,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:37:55,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:37:55" (1/1) ... [2020-10-27 01:37:55,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5158ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:55, skipping insertion in model container [2020-10-27 01:37:55,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:37:55" (1/1) ... [2020-10-27 01:37:55,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:37:55,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:37:56,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:37:56,047 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:37:56,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:37:56,146 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:37:56,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56 WrapperNode [2020-10-27 01:37:56,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:37:56,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:37:56,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:37:56,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:37:56,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (1/1) ... [2020-10-27 01:37:56,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:37:56,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:37:56,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:37:56,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:37:56,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (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 01:37:56,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:37:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:37:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:37:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:37:56,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:37:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:37:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:37:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:37:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:37:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:37:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:37:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:37:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:37:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:37:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:37:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:37:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:37:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:37:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:37:56,857 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:37:56,858 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 01:37:56,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:37:56 BoogieIcfgContainer [2020-10-27 01:37:56,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:37:56,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:37:56,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:37:56,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:37:56,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:37:55" (1/3) ... [2020-10-27 01:37:56,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:37:56, skipping insertion in model container [2020-10-27 01:37:56,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:56" (2/3) ... [2020-10-27 01:37:56,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:37:56, skipping insertion in model container [2020-10-27 01:37:56,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:37:56" (3/3) ... [2020-10-27 01:37:56,874 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+nlh-reducer.c [2020-10-27 01:37:56,886 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:37:56,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:37:56,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:37:56,934 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:37:56,935 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:37:56,935 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:37:56,935 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:37:56,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:37:56,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:37:56,936 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:37:56,936 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:37:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-10-27 01:37:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:37:56,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:56,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:56,964 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1252961620, now seen corresponding path program 1 times [2020-10-27 01:37:56,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:56,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038444276] [2020-10-27 01:37:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:57,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:37:57,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:37:57,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:37:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:37:57,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:37:57,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:57,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:57,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:57,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:57,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:57,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:37:57,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:57,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:57,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:57,662 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 01:37:57,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038444276] [2020-10-27 01:37:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:37:57,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281778474] [2020-10-27 01:37:57,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:37:57,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:37:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:37:57,694 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 5 states. [2020-10-27 01:37:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:58,059 INFO L93 Difference]: Finished difference Result 93 states and 135 transitions. [2020-10-27 01:37:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:37:58,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:37:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:58,073 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:37:58,073 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:37:58,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:37:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:37:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:37:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:37:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-27 01:37:58,161 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 13 [2020-10-27 01:37:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:58,163 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-27 01:37:58,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:37:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-27 01:37:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:37:58,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:58,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:58,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:37:58,166 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1152700707, now seen corresponding path program 1 times [2020-10-27 01:37:58,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:58,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268312742] [2020-10-27 01:37:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:58,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:58,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:58,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:37:58,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:58,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 01:37:58,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:37:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:58,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:37:58,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:58,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:58,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:58,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:58,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:58,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:37:58,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:58,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:58,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:37:58,558 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 01:37:58,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268312742] [2020-10-27 01:37:58,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:58,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:37:58,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640899634] [2020-10-27 01:37:58,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:37:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:58,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:37:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:37:58,567 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 5 states. [2020-10-27 01:37:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:58,960 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2020-10-27 01:37:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:37:58,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:37:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:58,963 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:37:58,963 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:37:58,964 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 01:37:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:37:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2020-10-27 01:37:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:37:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-27 01:37:58,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-10-27 01:37:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:58,977 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-27 01:37:58,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:37:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-27 01:37:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:37:58,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:58,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:58,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:37:58,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash -187152699, now seen corresponding path program 1 times [2020-10-27 01:37:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:58,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939735115] [2020-10-27 01:37:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:59,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:59,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:37:59,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:59,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 01:37:59,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:37:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:37:59,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:59,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:59,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:59,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:59,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:37:59,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:59,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:59,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:59,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:59,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:59,146 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 01:37:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939735115] [2020-10-27 01:37:59,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:37:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073122343] [2020-10-27 01:37:59,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:37:59,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:37:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:37:59,149 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 5 states. [2020-10-27 01:37:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:59,394 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2020-10-27 01:37:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:37:59,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 01:37:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:59,396 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:37:59,397 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:37:59,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 01:37:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:37:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-10-27 01:37:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:37:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2020-10-27 01:37:59,409 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 14 [2020-10-27 01:37:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:59,410 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2020-10-27 01:37:59,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:37:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2020-10-27 01:37:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:37:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:59,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:37:59,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:37:59,411 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 533409449, now seen corresponding path program 1 times [2020-10-27 01:37:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:59,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519505845] [2020-10-27 01:37:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:59,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:59,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:37:59,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:37:59,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 01:37:59,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:37:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:37:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:37:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:59,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:59,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:59,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:59,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:37:59,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:59,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:59,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:59,795 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 01:37:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519505845] [2020-10-27 01:37:59,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:59,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:37:59,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120076064] [2020-10-27 01:37:59,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:37:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:59,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:37:59,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:37:59,798 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand 5 states. [2020-10-27 01:37:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:59,997 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-27 01:37:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:37:59,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:37:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:59,999 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:37:59,999 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:38:00,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 01:38:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:38:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:38:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:38:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2020-10-27 01:38:00,009 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 16 [2020-10-27 01:38:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:00,010 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2020-10-27 01:38:00,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:38:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2020-10-27 01:38:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:38:00,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:00,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:00,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:38:00,012 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1814873839, now seen corresponding path program 1 times [2020-10-27 01:38:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:00,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118084984] [2020-10-27 01:38:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:38:00,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 01:38:00,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:38:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:38:00,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:00,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:00,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:00,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,362 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 01:38:00,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118084984] [2020-10-27 01:38:00,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:00,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:38:00,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077481999] [2020-10-27 01:38:00,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:38:00,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:38:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:38:00,370 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 5 states. [2020-10-27 01:38:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:00,596 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-10-27 01:38:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:38:00,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:38:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:00,598 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:38:00,598 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:38:00,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 01:38:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:38:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:38:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:38:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2020-10-27 01:38:00,613 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 16 [2020-10-27 01:38:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:00,613 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2020-10-27 01:38:00,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:38:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2020-10-27 01:38:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:38:00,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:00,617 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 01:38:00,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:38:00,618 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -644212752, now seen corresponding path program 1 times [2020-10-27 01:38:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561550448] [2020-10-27 01:38:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:38:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:01,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:01,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,038 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 01:38:01,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561550448] [2020-10-27 01:38:01,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:01,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:01,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396716511] [2020-10-27 01:38:01,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:01,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:01,041 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 6 states. [2020-10-27 01:38:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:01,279 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-27 01:38:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:38:01,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:38:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:01,281 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:38:01,281 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:38:01,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:38:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:38:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:38:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:38:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-27 01:38:01,290 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 17 [2020-10-27 01:38:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:01,291 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-27 01:38:01,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-27 01:38:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:38:01,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:01,292 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 01:38:01,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:38:01,293 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -413143954, now seen corresponding path program 1 times [2020-10-27 01:38:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:01,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674980087] [2020-10-27 01:38:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:01,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:38:01,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 01:38:01,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:38:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:01,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:01,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:01,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:01,587 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 01:38:01,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674980087] [2020-10-27 01:38:01,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:01,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316680077] [2020-10-27 01:38:01,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:01,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:01,590 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 6 states. [2020-10-27 01:38:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:01,866 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2020-10-27 01:38:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:38:01,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:38:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:01,868 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:38:01,868 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:38:01,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:38:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:38:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-10-27 01:38:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:38:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-27 01:38:01,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 17 [2020-10-27 01:38:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:01,885 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-27 01:38:01,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-27 01:38:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:38:01,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:01,888 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 01:38:01,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:38:01,888 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -426473086, now seen corresponding path program 1 times [2020-10-27 01:38:01,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:01,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525675672] [2020-10-27 01:38:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:01,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:01,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:02,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:38:02,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-27 01:38:02,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:02,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:38:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:02,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:02,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:02,386 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 01:38:02,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525675672] [2020-10-27 01:38:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608216382] [2020-10-27 01:38:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:02,391 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 6 states. [2020-10-27 01:38:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:02,623 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-27 01:38:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:38:02,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:38:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:02,625 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:38:02,625 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:38:02,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:38:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:38:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:38:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:38:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-27 01:38:02,640 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 17 [2020-10-27 01:38:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:02,640 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-27 01:38:02,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-27 01:38:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:38:02,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:02,641 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 01:38:02,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:38:02,641 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1945004872, now seen corresponding path program 1 times [2020-10-27 01:38:02,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:02,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005489429] [2020-10-27 01:38:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:38:02,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:02,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:02,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:02,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:02,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:02,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:02,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:02,897 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 01:38:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005489429] [2020-10-27 01:38:02,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:02,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:02,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467613797] [2020-10-27 01:38:02,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:02,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:02,904 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 6 states. [2020-10-27 01:38:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:03,102 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-27 01:38:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:38:03,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:38:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:03,106 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:38:03,106 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:38:03,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:38:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:38:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-27 01:38:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:38:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-27 01:38:03,115 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 18 [2020-10-27 01:38:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:03,117 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-27 01:38:03,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-27 01:38:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:38:03,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:03,120 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 01:38:03,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:38:03,120 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1992718894, now seen corresponding path program 1 times [2020-10-27 01:38:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:03,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115045631] [2020-10-27 01:38:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:03,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:38:03,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:03,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 01:38:03,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:03,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:03,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:38:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:03,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:03,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:03,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:38:03,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:38:03,366 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 01:38:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115045631] [2020-10-27 01:38:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:03,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:03,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414040448] [2020-10-27 01:38:03,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:03,372 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 6 states. [2020-10-27 01:38:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:03,548 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-27 01:38:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:38:03,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:38:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:03,549 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:38:03,549 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:38:03,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:38:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:38:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:38:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:38:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 01:38:03,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 18 [2020-10-27 01:38:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:03,563 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 01:38:03,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 01:38:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:38:03,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:03,564 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 01:38:03,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:38:03,567 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:03,567 INFO L82 PathProgramCache]: Analyzing trace with hash 77494928, now seen corresponding path program 1 times [2020-10-27 01:38:03,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:03,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599166018] [2020-10-27 01:38:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:03,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:03,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:38:03,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:38:03,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:03,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:03,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:03,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:03,887 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 01:38:03,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599166018] [2020-10-27 01:38:03,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:03,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:03,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506583581] [2020-10-27 01:38:03,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:03,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:03,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:03,890 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 6 states. [2020-10-27 01:38:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:04,170 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2020-10-27 01:38:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:38:04,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:38:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:04,172 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:38:04,172 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:38:04,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:38:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:38:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-27 01:38:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:38:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-27 01:38:04,187 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 18 [2020-10-27 01:38:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:04,187 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-27 01:38:04,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-27 01:38:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:38:04,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:04,188 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 01:38:04,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:38:04,189 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash 207916293, now seen corresponding path program 1 times [2020-10-27 01:38:04,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:04,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885653917] [2020-10-27 01:38:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:04,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:38:04,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:38:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:04,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:04,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:04,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:04,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:04,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:04,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,448 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 01:38:04,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885653917] [2020-10-27 01:38:04,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:04,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:04,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715150517] [2020-10-27 01:38:04,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:04,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:04,450 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 6 states. [2020-10-27 01:38:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:04,638 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2020-10-27 01:38:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:38:04,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:38:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:04,639 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:38:04,639 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:38:04,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:38:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:38:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-10-27 01:38:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:38:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-27 01:38:04,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 19 [2020-10-27 01:38:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:04,646 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-27 01:38:04,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-27 01:38:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:38:04,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:04,647 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 01:38:04,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:38:04,647 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash 165588862, now seen corresponding path program 1 times [2020-10-27 01:38:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:04,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518613815] [2020-10-27 01:38:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:04,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:04,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:38:04,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:04,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:04,920 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 01:38:04,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518613815] [2020-10-27 01:38:04,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:04,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596372399] [2020-10-27 01:38:04,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:04,923 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-10-27 01:38:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:05,141 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-27 01:38:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:38:05,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:38:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:05,142 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:38:05,143 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:38:05,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:38:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:38:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-27 01:38:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:38:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-27 01:38:05,153 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2020-10-27 01:38:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:05,154 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-27 01:38:05,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-27 01:38:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:38:05,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:05,156 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 01:38:05,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:38:05,157 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1644760434, now seen corresponding path program 1 times [2020-10-27 01:38:05,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295880709] [2020-10-27 01:38:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:05,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:38:05,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:05,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 01:38:05,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:05,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:05,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:05,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:38:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:05,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:05,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:05,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:05,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:05,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:05,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:05,432 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 01:38:05,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295880709] [2020-10-27 01:38:05,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:05,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:05,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95136888] [2020-10-27 01:38:05,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:05,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:05,434 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 6 states. [2020-10-27 01:38:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:05,614 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-27 01:38:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:38:05,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:38:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:05,615 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:38:05,615 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:38:05,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:38:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:38:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:38:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:38:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-27 01:38:05,635 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2020-10-27 01:38:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:05,635 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-27 01:38:05,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-27 01:38:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:38:05,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:05,638 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 01:38:05,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:38:05,638 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2086285341, now seen corresponding path program 1 times [2020-10-27 01:38:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:05,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479494140] [2020-10-27 01:38:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:05,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:05,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:38:05,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 01:38:05,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:38:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:05,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:05,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:05,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:05,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:05,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:05,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:05,969 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 01:38:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479494140] [2020-10-27 01:38:05,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:05,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:38:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988681411] [2020-10-27 01:38:05,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:38:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:38:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:38:05,972 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-10-27 01:38:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:06,154 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-27 01:38:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:38:06,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:38:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:06,156 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:38:06,156 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:38:06,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:38:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:38:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-27 01:38:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:38:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 01:38:06,163 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2020-10-27 01:38:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:06,163 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 01:38:06,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:38:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 01:38:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:38:06,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:06,165 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 01:38:06,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:38:06,165 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2144527184, now seen corresponding path program 1 times [2020-10-27 01:38:06,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:06,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113030433] [2020-10-27 01:38:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:06,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:06,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:38:06,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:38:06,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:38:06,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:06,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:38:06,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:06,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:06,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:06,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:06,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:06,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:38:06,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:06,547 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 01:38:06,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113030433] [2020-10-27 01:38:06,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:06,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:38:06,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001235364] [2020-10-27 01:38:06,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:38:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:38:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:38:06,554 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-10-27 01:38:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:06,843 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-10-27 01:38:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:38:06,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:38:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:06,846 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:38:06,846 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:38:06,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:38:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:38:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-27 01:38:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:38:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-27 01:38:06,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 20 [2020-10-27 01:38:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:06,858 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-27 01:38:06,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:38:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-27 01:38:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:38:06,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:06,859 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 01:38:06,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:38:06,859 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash 216502178, now seen corresponding path program 1 times [2020-10-27 01:38:06,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:06,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117693092] [2020-10-27 01:38:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:07,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:38:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:07,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:38:07,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:07,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:07,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:07,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:07,889 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 01:38:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117693092] [2020-10-27 01:38:07,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:07,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:38:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217641301] [2020-10-27 01:38:07,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:38:07,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:38:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:38:07,896 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-10-27 01:38:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:08,046 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-27 01:38:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:38:08,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 01:38:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:08,048 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:38:08,048 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:38:08,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 01:38:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:38:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:38:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:38:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 01:38:08,058 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 21 [2020-10-27 01:38:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:08,058 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 01:38:08,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:38:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 01:38:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:38:08,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:08,059 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 01:38:08,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:38:08,060 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1878376405, now seen corresponding path program 1 times [2020-10-27 01:38:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:08,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838159870] [2020-10-27 01:38:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:08,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:08,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:38:08,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:38:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-27 01:38:08,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:38:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:38:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:08,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:08,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:08,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:08,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:08,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:08,934 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 01:38:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838159870] [2020-10-27 01:38:08,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:08,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:38:08,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284760902] [2020-10-27 01:38:08,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:38:08,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:38:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:38:08,936 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2020-10-27 01:38:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:09,338 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-27 01:38:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:38:09,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:38:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:09,339 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:38:09,339 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:38:09,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:38:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:38:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:38:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:38:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-27 01:38:09,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 22 [2020-10-27 01:38:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:09,347 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-27 01:38:09,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:38:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-27 01:38:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:38:09,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:09,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:09,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:38:09,349 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:09,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1984748226, now seen corresponding path program 1 times [2020-10-27 01:38:09,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362652224] [2020-10-27 01:38:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:09,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:09,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:09,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:38:09,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-27 01:38:09,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:38:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:38:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:38:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:09,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:09,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:09,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:09,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:09,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:38:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:09,870 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 01:38:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362652224] [2020-10-27 01:38:09,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:38:09,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:38:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57043449] [2020-10-27 01:38:09,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:38:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:38:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:38:09,873 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 9 states. [2020-10-27 01:38:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:10,109 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-27 01:38:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:38:10,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:38:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:10,110 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:38:10,111 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:38:10,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:38:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:38:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:38:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:38:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:38:10,115 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-27 01:38:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:10,115 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:38:10,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:38:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:38:10,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:38:10,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:38:10,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:38:10,243 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-27 01:38:10,677 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-27 01:38:10,830 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-27 01:38:10,831 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-27 01:38:10,831 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-27 01:38:10,831 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-27 01:38:10,831 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:38:10,832 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_247_0~0 |old(~__tmp_247_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 01:38:10,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:38:10,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:38:10,832 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:38:10,832 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:38:10,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:38:10,832 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-27 01:38:10,832 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-27 01:38:10,833 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-27 01:38:10,833 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-27 01:38:10,833 INFO L270 CegarLoopResult]: At program point L225(line 225) the Hoare annotation is: false [2020-10-27 01:38:10,833 INFO L274 CegarLoopResult]: For program point L225-1(line 225) no Hoare annotation was computed. [2020-10-27 01:38:10,833 INFO L274 CegarLoopResult]: For program point L349(lines 349 358) no Hoare annotation was computed. [2020-10-27 01:38:10,833 INFO L270 CegarLoopResult]: At program point L250(lines 102 252) the Hoare annotation is: (and (< main_~main__t~0 main_~main__tagbuf_len~0) (not (= main_~__VERIFIER_assert__cond~0 0)) (<= 1 main_~main__t~0) (<= 1 main_~__VERIFIER_assert__cond~1)) [2020-10-27 01:38:10,833 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 375) no Hoare annotation was computed. [2020-10-27 01:38:10,834 INFO L270 CegarLoopResult]: At program point L85(line 85) the Hoare annotation is: false [2020-10-27 01:38:10,834 INFO L274 CegarLoopResult]: For program point L85-1(line 85) no Hoare annotation was computed. [2020-10-27 01:38:10,835 INFO L274 CegarLoopResult]: For program point L308(lines 308 316) no Hoare annotation was computed. [2020-10-27 01:38:10,835 INFO L270 CegarLoopResult]: At program point L143(line 143) the Hoare annotation is: false [2020-10-27 01:38:10,836 INFO L274 CegarLoopResult]: For program point L143-1(line 143) no Hoare annotation was computed. [2020-10-27 01:38:10,836 INFO L270 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: false [2020-10-27 01:38:10,836 INFO L274 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-10-27 01:38:10,836 INFO L274 CegarLoopResult]: For program point L102(lines 102 252) no Hoare annotation was computed. [2020-10-27 01:38:10,836 INFO L274 CegarLoopResult]: For program point L325(lines 325 362) no Hoare annotation was computed. [2020-10-27 01:38:10,837 INFO L270 CegarLoopResult]: At program point L127(line 127) the Hoare annotation is: false [2020-10-27 01:38:10,837 INFO L274 CegarLoopResult]: For program point L127-1(line 127) no Hoare annotation was computed. [2020-10-27 01:38:10,837 INFO L274 CegarLoopResult]: For program point L20(lines 20 374) no Hoare annotation was computed. [2020-10-27 01:38:10,837 INFO L270 CegarLoopResult]: At program point L177(line 177) the Hoare annotation is: false [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L177-1(line 177) no Hoare annotation was computed. [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L235(lines 235 243) no Hoare annotation was computed. [2020-10-27 01:38:10,838 INFO L270 CegarLoopResult]: At program point L351(line 351) the Hoare annotation is: false [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L351-1(line 351) no Hoare annotation was computed. [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L153(lines 153 161) no Hoare annotation was computed. [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L54(lines 54 254) no Hoare annotation was computed. [2020-10-27 01:38:10,838 INFO L270 CegarLoopResult]: At program point L310(line 310) the Hoare annotation is: false [2020-10-27 01:38:10,838 INFO L274 CegarLoopResult]: For program point L277(lines 277 364) no Hoare annotation was computed. [2020-10-27 01:38:10,839 INFO L274 CegarLoopResult]: For program point L310-1(line 310) no Hoare annotation was computed. [2020-10-27 01:38:10,839 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 375) no Hoare annotation was computed. [2020-10-27 01:38:10,839 INFO L274 CegarLoopResult]: For program point L71(lines 71 95) no Hoare annotation was computed. [2020-10-27 01:38:10,839 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 15 375) the Hoare annotation is: (and (= |old(~__tmp_247_0~0)| ~__tmp_247_0~0) (= |old(~__return_305~0)| ~__return_305~0) (= |old(~__tmp_383_0~0)| ~__tmp_383_0~0)) [2020-10-27 01:38:10,839 INFO L274 CegarLoopResult]: For program point L187(lines 187 197) no Hoare annotation was computed. [2020-10-27 01:38:10,839 INFO L274 CegarLoopResult]: For program point L113(lines 113 204) no Hoare annotation was computed. [2020-10-27 01:38:10,840 INFO L270 CegarLoopResult]: At program point L237(line 237) the Hoare annotation is: false [2020-10-27 01:38:10,840 INFO L274 CegarLoopResult]: For program point L237-1(line 237) no Hoare annotation was computed. [2020-10-27 01:38:10,842 INFO L270 CegarLoopResult]: At program point L328(lines 32 368) the Hoare annotation is: (and (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (<= 0 main_~main__t~0)) [2020-10-27 01:38:10,842 INFO L270 CegarLoopResult]: At program point L196(lines 60 254) the Hoare annotation is: (and (not (= main_~__VERIFIER_assert__cond~0 0)) (<= 1 main_~main__t~0) (<= 1 main_~__VERIFIER_assert__cond~1) (or (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (= main_~main__tagbuf_len~0 main_~main__t~0))) [2020-10-27 01:38:10,842 INFO L270 CegarLoopResult]: At program point L155(line 155) the Hoare annotation is: false [2020-10-27 01:38:10,842 INFO L274 CegarLoopResult]: For program point L155-1(line 155) no Hoare annotation was computed. [2020-10-27 01:38:10,842 INFO L270 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: false [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-10-27 01:38:10,843 INFO L270 CegarLoopResult]: At program point L279(line 279) the Hoare annotation is: false [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L279-1(line 279) no Hoare annotation was computed. [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L337(lines 337 360) no Hoare annotation was computed. [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L106(lines 106 210) no Hoare annotation was computed. [2020-10-27 01:38:10,843 INFO L270 CegarLoopResult]: At program point L73(line 73) the Hoare annotation is: false [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L73-1(line 73) no Hoare annotation was computed. [2020-10-27 01:38:10,843 INFO L274 CegarLoopResult]: For program point L296(lines 296 318) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L32(lines 32 368) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L270 CegarLoopResult]: At program point L189(line 189) the Hoare annotation is: false [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L189-1(line 189) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L24(lines 24 369) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L270 CegarLoopResult]: At program point L115(line 115) the Hoare annotation is: false [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L115-1(line 115) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L289(lines 289 363) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L223(lines 223 245) no Hoare annotation was computed. [2020-10-27 01:38:10,844 INFO L274 CegarLoopResult]: For program point L83(lines 83 93) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L270 CegarLoopResult]: At program point L339(line 339) the Hoare annotation is: false [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L339-1(line 339) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L141(lines 141 163) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L42(lines 42 256) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L270 CegarLoopResult]: At program point L298(line 298) the Hoare annotation is: false [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L298-1(line 298) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L125(lines 125 202) no Hoare annotation was computed. [2020-10-27 01:38:10,845 INFO L270 CegarLoopResult]: At program point L315(lines 32 368) the Hoare annotation is: (<= 0 main_~main__t~0) [2020-10-27 01:38:10,845 INFO L274 CegarLoopResult]: For program point L216(lines 216 251) no Hoare annotation was computed. [2020-10-27 01:38:10,846 INFO L274 CegarLoopResult]: For program point L175(lines 175 199) no Hoare annotation was computed. [2020-10-27 01:38:10,846 INFO L274 CegarLoopResult]: For program point L266(lines 266 366) no Hoare annotation was computed. [2020-10-27 01:38:10,846 INFO L274 CegarLoopResult]: For program point L134(lines 134 201) no Hoare annotation was computed. [2020-10-27 01:38:10,847 INFO L270 CegarLoopResult]: At program point L357(lines 283 364) the Hoare annotation is: (and (< main_~main__t~0 main_~main__tagbuf_len~0) (not (= main_~__VERIFIER_assert__cond~13 0)) (<= 0 main_~main__t~0)) [2020-10-27 01:38:10,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:38:10 BoogieIcfgContainer [2020-10-27 01:38:10,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:38:10,886 INFO L168 Benchmark]: Toolchain (without parser) took 15183.63 ms. Allocated memory was 172.0 MB in the beginning and 358.6 MB in the end (delta: 186.6 MB). Free memory was 147.8 MB in the beginning and 317.5 MB in the end (delta: -169.6 MB). Peak memory consumption was 172.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:38:10,891 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 125.8 MB. Free memory is still 84.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:38:10,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.41 ms. Allocated memory is still 172.0 MB. Free memory was 147.1 MB in the beginning and 135.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:38:10,895 INFO L168 Benchmark]: Boogie Preprocessor took 49.20 ms. Allocated memory is still 172.0 MB. Free memory was 135.1 MB in the beginning and 133.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:38:10,895 INFO L168 Benchmark]: RCFGBuilder took 660.89 ms. Allocated memory is still 172.0 MB. Free memory was 133.3 MB in the beginning and 154.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 30.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:38:10,896 INFO L168 Benchmark]: TraceAbstraction took 14017.49 ms. Allocated memory was 172.0 MB in the beginning and 358.6 MB in the end (delta: 186.6 MB). Free memory was 154.2 MB in the beginning and 317.5 MB in the end (delta: -163.2 MB). Peak memory consumption was 178.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:38:10,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 125.8 MB. Free memory is still 84.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 442.41 ms. Allocated memory is still 172.0 MB. Free memory was 147.1 MB in the beginning and 135.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.20 ms. Allocated memory is still 172.0 MB. Free memory was 135.1 MB in the beginning and 133.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 660.89 ms. Allocated memory is still 172.0 MB. Free memory was 133.3 MB in the beginning and 154.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 30.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14017.49 ms. Allocated memory was 172.0 MB in the beginning and 358.6 MB in the end (delta: 186.6 MB). Free memory was 154.2 MB in the beginning and 317.5 MB in the end (delta: -163.2 MB). Peak memory consumption was 178.1 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: 32]: Loop Invariant Derived loop invariant: 0 <= main__t - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: main__t + 1 <= main__tagbuf_len && 0 <= main__t - InvariantResult [Line: 60]: Loop Invariant Derived loop invariant: ((!(__VERIFIER_assert__cond == 0) && 1 <= main__t) && 1 <= __VERIFIER_assert__cond) && (main__t + 1 <= main__tagbuf_len || main__tagbuf_len == main__t) - InvariantResult [Line: 102]: Loop Invariant Derived loop invariant: ((main__t < main__tagbuf_len && !(__VERIFIER_assert__cond == 0)) && 1 <= main__t) && 1 <= __VERIFIER_assert__cond - InvariantResult [Line: 283]: Loop Invariant Derived loop invariant: (main__t < main__tagbuf_len && !(__VERIFIER_assert__cond == 0)) && 0 <= main__t - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 802 SDtfs, 1263 SDslu, 981 SDs, 0 SdLazy, 2118 SolverSat, 313 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 194 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred 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: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 190 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 45 PreInvPairs, 52 NumberOfFragments, 130 HoareAnnotationTreeSize, 45 FomulaSimplifications, 42884 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 27 FomulaSimplificationsInter, 3556 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 339 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 30122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 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...