/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:12:43,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:12:43,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:12:43,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:12:43,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:12:43,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:12:43,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:12:43,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:12:43,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:12:43,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:12:43,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:12:43,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:12:43,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:12:43,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:12:43,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:12:43,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:12:43,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:12:43,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:12:43,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:12:43,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:12:43,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:12:43,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:12:43,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:12:43,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:12:44,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:12:44,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:12:44,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:12:44,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:12:44,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:12:44,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:12:44,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:12:44,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:12:44,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:12:44,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:12:44,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:12:44,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:12:44,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:12:44,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:12:44,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:12:44,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:12:44,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:12:44,032 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 [2020-09-25 11:12:44,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:12:44,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:12:44,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:12:44,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:12:44,086 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:12:44,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:12:44,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:12:44,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:12:44,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:12:44,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:12:44,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:12:44,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:12:44,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:12:44,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:12:44,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:12:44,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:12:44,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:12:44,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:12:44,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:12:44,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:12:44,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:12:44,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:12:44,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:12:44,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:12:44,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:12:44,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:12:44,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:12:44,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:12:44,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:12:44,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:12:44,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:12:44,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:12:44,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:12:44,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:12:44,601 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:12:44,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-25 11:12:44,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18ebc5757/31dfdbed85ab4348b081a684860de2e2/FLAG1a943e995 [2020-09-25 11:12:45,320 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:12:45,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-25 11:12:45,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18ebc5757/31dfdbed85ab4348b081a684860de2e2/FLAG1a943e995 [2020-09-25 11:12:45,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18ebc5757/31dfdbed85ab4348b081a684860de2e2 [2020-09-25 11:12:45,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:12:45,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:12:45,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:12:45,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:12:45,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:12:45,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:12:45" (1/1) ... [2020-09-25 11:12:45,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304cdd5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:45, skipping insertion in model container [2020-09-25 11:12:45,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:12:45" (1/1) ... [2020-09-25 11:12:45,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:12:45,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:12:46,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:12:46,168 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:12:46,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:12:46,331 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:12:46,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46 WrapperNode [2020-09-25 11:12:46,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:12:46,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:12:46,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:12:46,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:12:46,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (1/1) ... [2020-09-25 11:12:46,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:12:46,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:12:46,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:12:46,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:12:46,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (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 [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 11:12:46,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:12:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:12:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:12:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 11:12:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 11:12:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 11:12:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 11:12:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 11:12:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 11:12:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 11:12:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 11:12:46,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 11:12:46,514 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 11:12:46,515 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 11:12:46,516 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 11:12:46,517 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 11:12:46,518 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 11:12:46,519 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 11:12:46,520 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 11:12:46,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 11:12:46,522 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 11:12:46,523 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 11:12:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 11:12:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 11:12:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 11:12:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:12:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 11:12:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 11:12:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:12:46,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:12:46,884 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 11:12:47,331 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:12:47,331 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-25 11:12:47,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:12:47 BoogieIcfgContainer [2020-09-25 11:12:47,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:12:47,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:12:47,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:12:47,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:12:47,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:12:45" (1/3) ... [2020-09-25 11:12:47,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603111d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:12:47, skipping insertion in model container [2020-09-25 11:12:47,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:46" (2/3) ... [2020-09-25 11:12:47,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603111d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:12:47, skipping insertion in model container [2020-09-25 11:12:47,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:12:47" (3/3) ... [2020-09-25 11:12:47,349 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-25 11:12:47,361 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:12:47,373 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:12:47,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:12:47,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:12:47,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:12:47,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:12:47,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:12:47,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:12:47,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:12:47,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:12:47,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:12:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-09-25 11:12:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 11:12:47,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:47,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:47,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-09-25 11:12:47,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:47,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519346105] [2020-09-25 11:12:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:47,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:47,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:48,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:48,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:48,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 11:12:48,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:12:48,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-09-25 11:12:48,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:48,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:12:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:12:48,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:12:48,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:12:48,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:48,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:48,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:48,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:12:48,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:48,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:48,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:48,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:48,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:48,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:12:48,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519346105] [2020-09-25 11:12:48,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:48,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:12:48,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057779266] [2020-09-25 11:12:48,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:12:48,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:12:48,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:12:48,709 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 5 states. [2020-09-25 11:12:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:49,200 INFO L93 Difference]: Finished difference Result 377 states and 443 transitions. [2020-09-25 11:12:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:12:49,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 11:12:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:49,218 INFO L225 Difference]: With dead ends: 377 [2020-09-25 11:12:49,219 INFO L226 Difference]: Without dead ends: 201 [2020-09-25 11:12:49,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:12:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-25 11:12:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-09-25 11:12:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-25 11:12:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-09-25 11:12:49,293 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 31 [2020-09-25 11:12:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:49,294 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-09-25 11:12:49,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:12:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-09-25 11:12:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 11:12:49,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:49,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:49,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:12:49,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-09-25 11:12:49,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:49,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482995593] [2020-09-25 11:12:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:49,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:49,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:50,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:50,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 11:12:50,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:12:50,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-09-25 11:12:50,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:50,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:12:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:12:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:12:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:50,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:50,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:50,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:50,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:50,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:12:50,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:50,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:50,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:50,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:50,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:50,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:12:50,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482995593] [2020-09-25 11:12:50,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:50,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:12:50,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894842804] [2020-09-25 11:12:50,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:12:50,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:12:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:12:50,311 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 7 states. [2020-09-25 11:12:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:50,751 INFO L93 Difference]: Finished difference Result 277 states and 304 transitions. [2020-09-25 11:12:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:12:50,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-09-25 11:12:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:50,754 INFO L225 Difference]: With dead ends: 277 [2020-09-25 11:12:50,754 INFO L226 Difference]: Without dead ends: 271 [2020-09-25 11:12:50,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:12:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-25 11:12:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 213. [2020-09-25 11:12:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-25 11:12:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 238 transitions. [2020-09-25 11:12:50,772 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 238 transitions. Word has length 54 [2020-09-25 11:12:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:50,773 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 238 transitions. [2020-09-25 11:12:50,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:12:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 238 transitions. [2020-09-25 11:12:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:12:50,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:50,779 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:50,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:12:50,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1812282598, now seen corresponding path program 1 times [2020-09-25 11:12:50,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:50,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612368647] [2020-09-25 11:12:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:50,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:52,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:52,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:12:52,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:12:52,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-09-25 11:12:52,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:52,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:12:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:12:52,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:12:52,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:52,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:52,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:52,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:52,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:52,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:12:52,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:52,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:12:52,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612368647] [2020-09-25 11:12:52,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:52,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:12:52,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442400267] [2020-09-25 11:12:52,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:12:52,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:12:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:12:52,218 INFO L87 Difference]: Start difference. First operand 213 states and 238 transitions. Second operand 7 states. [2020-09-25 11:12:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:52,763 INFO L93 Difference]: Finished difference Result 280 states and 307 transitions. [2020-09-25 11:12:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:12:52,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-09-25 11:12:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:52,766 INFO L225 Difference]: With dead ends: 280 [2020-09-25 11:12:52,767 INFO L226 Difference]: Without dead ends: 265 [2020-09-25 11:12:52,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:12:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-25 11:12:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 210. [2020-09-25 11:12:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-09-25 11:12:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 234 transitions. [2020-09-25 11:12:52,797 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 234 transitions. Word has length 60 [2020-09-25 11:12:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:52,798 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 234 transitions. [2020-09-25 11:12:52,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:12:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 234 transitions. [2020-09-25 11:12:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:12:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:52,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:52,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:12:52,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash -775600822, now seen corresponding path program 1 times [2020-09-25 11:12:52,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:52,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621119525] [2020-09-25 11:12:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:52,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:52,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:54,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 11:12:54,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:12:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-09-25 11:12:54,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:54,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:12:54,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:12:54,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 11:12:54,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:54,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:54,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:54,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:54,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:12:54,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:54,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:12:54,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621119525] [2020-09-25 11:12:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:54,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:12:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166362617] [2020-09-25 11:12:54,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:12:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:12:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:12:54,098 INFO L87 Difference]: Start difference. First operand 210 states and 234 transitions. Second operand 7 states. [2020-09-25 11:12:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:54,491 INFO L93 Difference]: Finished difference Result 262 states and 288 transitions. [2020-09-25 11:12:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:12:54,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-09-25 11:12:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:54,493 INFO L225 Difference]: With dead ends: 262 [2020-09-25 11:12:54,494 INFO L226 Difference]: Without dead ends: 238 [2020-09-25 11:12:54,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:12:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-25 11:12:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 205. [2020-09-25 11:12:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 11:12:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 228 transitions. [2020-09-25 11:12:54,503 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 228 transitions. Word has length 60 [2020-09-25 11:12:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:54,504 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 228 transitions. [2020-09-25 11:12:54,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:12:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 228 transitions. [2020-09-25 11:12:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 11:12:54,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:54,506 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:54,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:12:54,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1984006919, now seen corresponding path program 1 times [2020-09-25 11:12:54,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:54,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182150812] [2020-09-25 11:12:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:54,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:56,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:58,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:58,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 11:12:58,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:12:58,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4255 [2020-09-25 11:12:58,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:58,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:12:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:12:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:12:58,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:58,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:58,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:58,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:58,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:58,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:12:58,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:58,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:58,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:58,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:58,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:12:58,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182150812] [2020-09-25 11:12:58,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:12:58,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:12:58,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772298826] [2020-09-25 11:12:58,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:12:58,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:12:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:12:58,986 INFO L87 Difference]: Start difference. First operand 205 states and 228 transitions. Second operand 11 states. [2020-09-25 11:12:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:59,713 INFO L93 Difference]: Finished difference Result 286 states and 313 transitions. [2020-09-25 11:12:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:12:59,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-09-25 11:12:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:59,716 INFO L225 Difference]: With dead ends: 286 [2020-09-25 11:12:59,716 INFO L226 Difference]: Without dead ends: 280 [2020-09-25 11:12:59,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:12:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-25 11:12:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 224. [2020-09-25 11:12:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-25 11:12:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 249 transitions. [2020-09-25 11:12:59,726 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 249 transitions. Word has length 65 [2020-09-25 11:12:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:59,727 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 249 transitions. [2020-09-25 11:12:59,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:12:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 249 transitions. [2020-09-25 11:12:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 11:12:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:59,728 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:59,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:12:59,729 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -611343915, now seen corresponding path program 1 times [2020-09-25 11:12:59,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636263508] [2020-09-25 11:12:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:59,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:59,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:03,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:03,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 11:13:03,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:13:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-09-25 11:13:03,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:03,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:03,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:13:03,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:13:03,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:13:03,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:03,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:03,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:03,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:03,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:03,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:13:03,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:03,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:03,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:03,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:03,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636263508] [2020-09-25 11:13:03,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:03,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:13:03,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885690557] [2020-09-25 11:13:03,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:13:03,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:03,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:13:03,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:13:03,227 INFO L87 Difference]: Start difference. First operand 224 states and 249 transitions. Second operand 11 states. [2020-09-25 11:13:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:04,037 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2020-09-25 11:13:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:13:04,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-09-25 11:13:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:04,040 INFO L225 Difference]: With dead ends: 302 [2020-09-25 11:13:04,040 INFO L226 Difference]: Without dead ends: 296 [2020-09-25 11:13:04,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:13:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-25 11:13:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 236. [2020-09-25 11:13:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-25 11:13:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 262 transitions. [2020-09-25 11:13:04,057 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 262 transitions. Word has length 65 [2020-09-25 11:13:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:04,059 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 262 transitions. [2020-09-25 11:13:04,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:13:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 262 transitions. [2020-09-25 11:13:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 11:13:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:04,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:04,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:13:04,062 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1316127329, now seen corresponding path program 1 times [2020-09-25 11:13:04,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574535449] [2020-09-25 11:13:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:04,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:13:09,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:13:09,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 11:13:09,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:13:09,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 11:13:09,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 11:13:09,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:09,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:09,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:09,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:13:09,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:09,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:09,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574535449] [2020-09-25 11:13:09,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:09,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:13:09,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217679209] [2020-09-25 11:13:09,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:13:09,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:13:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:13:09,398 INFO L87 Difference]: Start difference. First operand 236 states and 262 transitions. Second operand 14 states. [2020-09-25 11:13:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:10,736 INFO L93 Difference]: Finished difference Result 306 states and 336 transitions. [2020-09-25 11:13:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 11:13:10,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-09-25 11:13:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:10,739 INFO L225 Difference]: With dead ends: 306 [2020-09-25 11:13:10,739 INFO L226 Difference]: Without dead ends: 300 [2020-09-25 11:13:10,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-09-25 11:13:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-25 11:13:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2020-09-25 11:13:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-09-25 11:13:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-09-25 11:13:10,757 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 71 [2020-09-25 11:13:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:10,757 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-09-25 11:13:10,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:13:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-09-25 11:13:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 11:13:10,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:10,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:10,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:13:10,763 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -279445553, now seen corresponding path program 1 times [2020-09-25 11:13:10,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:10,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938992145] [2020-09-25 11:13:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:12,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:12,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:13:12,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:13:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2075 [2020-09-25 11:13:12,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:12,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:13:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 11:13:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 11:13:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:13,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:13,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:13,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:13,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:13,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:13,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:13:13,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:13,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:13,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:13,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:13,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:13,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:13,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938992145] [2020-09-25 11:13:13,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:13,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:13:13,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063208119] [2020-09-25 11:13:13,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:13:13,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:13:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:13:13,181 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 16 states. [2020-09-25 11:13:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:14,670 INFO L93 Difference]: Finished difference Result 315 states and 346 transitions. [2020-09-25 11:13:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:13:14,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-09-25 11:13:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:14,675 INFO L225 Difference]: With dead ends: 315 [2020-09-25 11:13:14,675 INFO L226 Difference]: Without dead ends: 309 [2020-09-25 11:13:14,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:13:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-09-25 11:13:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 254. [2020-09-25 11:13:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-25 11:13:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 282 transitions. [2020-09-25 11:13:14,686 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 282 transitions. Word has length 71 [2020-09-25 11:13:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:14,687 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 282 transitions. [2020-09-25 11:13:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:13:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 282 transitions. [2020-09-25 11:13:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 11:13:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:14,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:14,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:13:14,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1095319059, now seen corresponding path program 1 times [2020-09-25 11:13:14,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:14,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404189828] [2020-09-25 11:13:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:14,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:14,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:16,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:16,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:13:16,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:13:16,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-09-25 11:13:16,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:16,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:13:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 11:13:16,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 11:13:16,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:17,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:17,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:17,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:17,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:13:17,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:17,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:17,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:17,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:17,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404189828] [2020-09-25 11:13:17,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:17,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:13:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425526376] [2020-09-25 11:13:17,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:13:17,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:13:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:13:17,049 INFO L87 Difference]: Start difference. First operand 254 states and 282 transitions. Second operand 16 states. [2020-09-25 11:13:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:18,571 INFO L93 Difference]: Finished difference Result 329 states and 360 transitions. [2020-09-25 11:13:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:13:18,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-09-25 11:13:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:18,576 INFO L225 Difference]: With dead ends: 329 [2020-09-25 11:13:18,576 INFO L226 Difference]: Without dead ends: 323 [2020-09-25 11:13:18,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:13:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-09-25 11:13:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 256. [2020-09-25 11:13:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-25 11:13:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2020-09-25 11:13:18,588 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 71 [2020-09-25 11:13:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:18,589 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2020-09-25 11:13:18,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:13:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2020-09-25 11:13:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 11:13:18,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:18,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:18,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:13:18,591 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:18,591 INFO L82 PathProgramCache]: Analyzing trace with hash -58637283, now seen corresponding path program 1 times [2020-09-25 11:13:18,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:18,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821951247] [2020-09-25 11:13:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:18,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4213 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:13:22,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 11:13:22,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 11:13:22,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:23,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:13:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:23,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:23,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:23,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:23,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821951247] [2020-09-25 11:13:23,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:23,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:13:23,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937565379] [2020-09-25 11:13:23,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:13:23,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:23,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:13:23,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:13:23,137 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 16 states. [2020-09-25 11:13:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:24,708 INFO L93 Difference]: Finished difference Result 338 states and 370 transitions. [2020-09-25 11:13:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:13:24,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-09-25 11:13:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:24,711 INFO L225 Difference]: With dead ends: 338 [2020-09-25 11:13:24,711 INFO L226 Difference]: Without dead ends: 332 [2020-09-25 11:13:24,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:13:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-09-25 11:13:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 249. [2020-09-25 11:13:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-25 11:13:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions. [2020-09-25 11:13:24,722 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 71 [2020-09-25 11:13:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:24,723 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions. [2020-09-25 11:13:24,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:13:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions. [2020-09-25 11:13:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 11:13:24,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:24,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:24,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:13:24,725 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1279761314, now seen corresponding path program 2 times [2020-09-25 11:13:24,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:24,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233770951] [2020-09-25 11:13:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:24,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:24,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:29,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-25 11:13:29,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:13:29,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 11:13:29,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:29,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 11:13:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 11:13:29,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:13:29,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:13:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:30,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:30,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:30,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:13:30,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:30,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:30,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:30,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:30,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:30,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233770951] [2020-09-25 11:13:30,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:30,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 11:13:30,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787398202] [2020-09-25 11:13:30,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 11:13:30,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 11:13:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:13:30,090 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 18 states. [2020-09-25 11:13:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:31,730 INFO L93 Difference]: Finished difference Result 375 states and 411 transitions. [2020-09-25 11:13:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 11:13:31,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-09-25 11:13:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:31,732 INFO L225 Difference]: With dead ends: 375 [2020-09-25 11:13:31,732 INFO L226 Difference]: Without dead ends: 351 [2020-09-25 11:13:31,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 11:13:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-09-25 11:13:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 270. [2020-09-25 11:13:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-25 11:13:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 299 transitions. [2020-09-25 11:13:31,746 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 299 transitions. Word has length 76 [2020-09-25 11:13:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:31,748 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 299 transitions. [2020-09-25 11:13:31,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 11:13:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 299 transitions. [2020-09-25 11:13:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 11:13:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:31,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:31,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 11:13:31,750 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1620912108, now seen corresponding path program 1 times [2020-09-25 11:13:31,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:31,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779681767] [2020-09-25 11:13:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:31,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:32,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking...