/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:52:20,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:52:20,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:52:20,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:52:20,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:52:20,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:52:20,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:52:20,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:52:20,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:52:20,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:52:20,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:52:20,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:52:20,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:52:20,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:52:20,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:52:20,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:52:20,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:52:20,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:52:20,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:52:20,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:52:20,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:52:20,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:52:21,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:52:21,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:52:21,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:52:21,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:52:21,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:52:21,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:52:21,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:52:21,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:52:21,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:52:21,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:52:21,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:52:21,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:52:21,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:52:21,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:52:21,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:52:21,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:52:21,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:52:21,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:52:21,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:52:21,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:52:21,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:52:21,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:52:21,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:52:21,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:52:21,041 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:52:21,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:52:21,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:52:21,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:52:21,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:52:21,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:52:21,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:52:21,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:52:21,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:52:21,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:52:21,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:52:21,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:52:21,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:21,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:52:21,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:52:21,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:52:21,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:52:21,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:52:21,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:52:21,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:52:21,046 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:52:21,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:52:21,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:52:21,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:52:21,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:52:21,334 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:52:21,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-12 15:52:21,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bd20db6/1814c19dba10456d91e5aa79b9a86ac5/FLAG023bda91d [2020-10-12 15:52:21,889 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:52:21,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-12 15:52:21,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bd20db6/1814c19dba10456d91e5aa79b9a86ac5/FLAG023bda91d [2020-10-12 15:52:22,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30bd20db6/1814c19dba10456d91e5aa79b9a86ac5 [2020-10-12 15:52:22,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:52:22,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:52:22,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:22,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:52:22,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:52:22,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:22,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7553268b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22, skipping insertion in model container [2020-10-12 15:52:22,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:22,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:52:22,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:52:22,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:22,824 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:52:22,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:22,939 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:52:22,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22 WrapperNode [2020-10-12 15:52:22,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:22,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:52:22,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:52:22,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:52:22,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:22,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:22,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:22,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:23,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:23,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:23,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... [2020-10-12 15:52:23,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:52:23,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:52:23,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:52:23,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:52:23,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:23,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:52:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-12 15:52:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2020-10-12 15:52:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:52:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:52:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:52:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:52:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:52:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:52:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:52:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:52:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:52:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:52:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:52:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:52:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:52:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:52:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:52:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:52:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:52:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:52:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:52:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:52:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:52:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:52:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:52:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:52:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:52:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:52:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:52:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:52:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:52:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:52:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:52:23,090 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:52:23,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:52:23,092 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:52:23,093 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:52:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:52:23,095 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:52:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-12 15:52:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:52:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:52:23,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:52:23,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:52:23,482 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:52:23,625 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:52:23,625 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:52:23,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:23 BoogieIcfgContainer [2020-10-12 15:52:23,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:52:23,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:52:23,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:52:23,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:52:23,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:52:22" (1/3) ... [2020-10-12 15:52:23,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e440636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:23, skipping insertion in model container [2020-10-12 15:52:23,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:22" (2/3) ... [2020-10-12 15:52:23,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e440636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:23, skipping insertion in model container [2020-10-12 15:52:23,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:23" (3/3) ... [2020-10-12 15:52:23,639 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2020-10-12 15:52:23,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:52:23,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:52:23,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:52:23,691 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:52:23,691 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:52:23,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:52:23,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:52:23,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:52:23,692 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:52:23,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:52:23,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:52:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-12 15:52:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:52:23,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:23,715 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] [2020-10-12 15:52:23,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2020-10-12 15:52:23,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:23,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484804109] [2020-10-12 15:52:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:24,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:25,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:52:25,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-10-12 15:52:25,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:52:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:52:25,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:52:25,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:25,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:25,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:25,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:25,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:25,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:25,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:25,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:25,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:25,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:25,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:52:25,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:25,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:25,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:25,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:25,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:25,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-12 15:52:25,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:25,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:25,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:25,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:25,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:25,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-12 15:52:25,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:25,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:25,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:25,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:26,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484804109] [2020-10-12 15:52:26,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:26,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 15:52:26,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351525109] [2020-10-12 15:52:26,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:52:26,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:26,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:52:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:52:26,151 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 15 states. [2020-10-12 15:52:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:27,367 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2020-10-12 15:52:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:52:27,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 15:52:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:27,383 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:52:27,384 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 15:52:27,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:52:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 15:52:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-12 15:52:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:52:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-12 15:52:27,464 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2020-10-12 15:52:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:27,466 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-12 15:52:27,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:52:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-12 15:52:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:52:27,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:27,474 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] [2020-10-12 15:52:27,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:52:27,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2006336947, now seen corresponding path program 1 times [2020-10-12 15:52:27,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:27,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500540900] [2020-10-12 15:52:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:27,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:52:28,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:52:28,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:28,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:28,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:28,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:28,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:28,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:52:28,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:28,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:28,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:28,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 15:52:28,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:52:28,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:28,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:28,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 15:52:28,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:28,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:28,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500540900] [2020-10-12 15:52:28,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 15:52:28,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711183509] [2020-10-12 15:52:28,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:52:28,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:52:28,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:52:28,868 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2020-10-12 15:52:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:29,211 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-12 15:52:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:52:29,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:52:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:29,213 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:52:29,213 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 15:52:29,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:52:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 15:52:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-12 15:52:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:52:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-12 15:52:29,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 30 [2020-10-12 15:52:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:29,226 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-12 15:52:29,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:52:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-12 15:52:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:52:29,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:29,228 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] [2020-10-12 15:52:29,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:52:29,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2006335273, now seen corresponding path program 1 times [2020-10-12 15:52:29,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:29,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330100328] [2020-10-12 15:52:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:29,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:52:29,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:29,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-12 15:52:29,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:29,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:52:29,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:29,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:52:29,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:29,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:29,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:29,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:29,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:29,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:29,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:29,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:52:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:52:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:29,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:29,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:29,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-12 15:52:29,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:52:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:52:29,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:29,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:30,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:30,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:30,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:30,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:52:30,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:30,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:52:30,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:30,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330100328] [2020-10-12 15:52:30,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:30,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 15:52:30,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427719012] [2020-10-12 15:52:30,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:52:30,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:52:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:52:30,072 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 14 states. [2020-10-12 15:52:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:30,599 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-12 15:52:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:52:30,599 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 15:52:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:30,601 INFO L225 Difference]: With dead ends: 59 [2020-10-12 15:52:30,601 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:52:30,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:52:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:52:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-12 15:52:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:52:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-12 15:52:30,611 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 30 [2020-10-12 15:52:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:30,612 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-12 15:52:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:52:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-12 15:52:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:52:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:30,613 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] [2020-10-12 15:52:30,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:52:30,614 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2020-10-12 15:52:30,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:30,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131867752] [2020-10-12 15:52:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:30,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:30,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:52:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-12 15:52:31,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:52:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:52:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:32,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:32,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:32,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:32,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:52:32,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:32,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:32,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:32,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:32,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-12 15:52:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:52:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:32,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:32,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:32,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 15:52:32,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:32,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:32,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131867752] [2020-10-12 15:52:32,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:32,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-12 15:52:32,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221381454] [2020-10-12 15:52:32,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:52:32,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:52:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:52:32,950 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 20 states. [2020-10-12 15:52:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:33,787 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-12 15:52:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:52:33,788 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-12 15:52:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:33,790 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:52:33,790 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:52:33,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:52:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:52:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-12 15:52:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:52:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-12 15:52:33,799 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 35 [2020-10-12 15:52:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:33,800 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-12 15:52:33,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:52:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-12 15:52:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:52:33,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:33,801 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] [2020-10-12 15:52:33,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:52:33,802 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 352162664, now seen corresponding path program 1 times [2020-10-12 15:52:33,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:33,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401656091] [2020-10-12 15:52:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:52:33,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 15:52:33,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:33,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:33,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:33,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:33,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:52:33,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:52:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:33,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:33,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:52:33,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:33,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:52:33,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:33,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:33,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:33,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:33,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:33,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:52:33,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:33,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:33,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401656091] [2020-10-12 15:52:33,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:33,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:52:33,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447082312] [2020-10-12 15:52:33,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:52:33,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:52:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:52:33,998 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 7 states. [2020-10-12 15:52:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:34,164 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-12 15:52:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:52:34,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-12 15:52:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:34,165 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:52:34,165 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:52:34,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:52:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:52:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-12 15:52:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:52:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-12 15:52:34,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2020-10-12 15:52:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:34,182 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-12 15:52:34,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:52:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-12 15:52:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:34,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:34,186 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] [2020-10-12 15:52:34,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:52:34,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash -663904884, now seen corresponding path program 1 times [2020-10-12 15:52:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:34,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683639871] [2020-10-12 15:52:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:34,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:34,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:34,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-12 15:52:34,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:34,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:34,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 15:52:34,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:52:34,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:35,004 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-10-12 15:52:35,136 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-12 15:52:35,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:35,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:35,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:35,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:35,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:35,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:35,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:35,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:35,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:52:35,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:35,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:35,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:35,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 15:52:35,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:52:35,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:36,089 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 81 [2020-10-12 15:52:36,378 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2020-10-12 15:52:36,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:36,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:36,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:36,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:36,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:52:36,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:52:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:36,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683639871] [2020-10-12 15:52:36,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:36,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:52:36,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115910503] [2020-10-12 15:52:36,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:52:36,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:52:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:52:36,486 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 12 states. [2020-10-12 15:52:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:37,140 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-12 15:52:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:52:37,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 15:52:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:37,141 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:52:37,141 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:52:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:52:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:52:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-12 15:52:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:52:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-12 15:52:37,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 37 [2020-10-12 15:52:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:37,151 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-12 15:52:37,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:52:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-12 15:52:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:37,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:37,153 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] [2020-10-12 15:52:37,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:52:37,153 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash -663903210, now seen corresponding path program 1 times [2020-10-12 15:52:37,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:37,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190585467] [2020-10-12 15:52:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:38,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-12 15:52:38,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:52:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:52:38,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:38,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:52:38,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:38,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:38,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:38,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 15:52:38,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:52:38,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:38,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-12 15:52:38,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:52:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:38,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:39,180 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-12 15:52:39,497 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-12 15:52:39,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:39,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:39,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 15:52:39,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:52:39,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:39,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:40,101 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-12 15:52:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:40,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190585467] [2020-10-12 15:52:40,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:40,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:52:40,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177097513] [2020-10-12 15:52:40,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:52:40,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:40,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:52:40,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:52:40,125 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 24 states. [2020-10-12 15:52:41,329 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-12 15:52:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:41,753 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-12 15:52:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:52:41,754 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-10-12 15:52:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:41,755 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:52:41,755 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:52:41,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:52:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:52:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-12 15:52:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:52:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-12 15:52:41,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 37 [2020-10-12 15:52:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:41,765 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-12 15:52:41,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:52:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-12 15:52:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:52:41,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:41,767 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] [2020-10-12 15:52:41,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:52:41,767 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1056931894, now seen corresponding path program 1 times [2020-10-12 15:52:41,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:41,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240857252] [2020-10-12 15:52:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:41,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:43,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:52:43,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:52:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2055 [2020-10-12 15:52:43,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:52:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:52:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:43,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:43,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:43,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:43,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:43,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:43,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:43,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:43,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:43,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:44,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 15:52:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:44,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-12 15:52:44,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:44,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:44,593 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 15:52:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:44,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:44,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:44,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:44,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:52:44,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:44,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:44,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:44,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:44,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240857252] [2020-10-12 15:52:44,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:44,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:52:44,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679767613] [2020-10-12 15:52:44,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:52:44,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:52:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:52:44,840 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 20 states. [2020-10-12 15:52:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:46,087 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2020-10-12 15:52:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:52:46,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-12 15:52:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:46,089 INFO L225 Difference]: With dead ends: 101 [2020-10-12 15:52:46,089 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:52:46,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:52:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:52:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2020-10-12 15:52:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:52:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-12 15:52:46,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-10-12 15:52:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:46,098 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-12 15:52:46,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:52:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-12 15:52:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:52:46,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:46,099 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] [2020-10-12 15:52:46,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:52:46,100 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:46,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1939186407, now seen corresponding path program 2 times [2020-10-12 15:52:46,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:46,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592596185] [2020-10-12 15:52:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:52:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:52:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:46,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:46,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:46,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:46,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:52:46,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:52:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:46,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:52:46,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:52:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:52:46,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:46,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:52:46,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:46,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:46,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592596185] [2020-10-12 15:52:46,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:46,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:52:46,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296336262] [2020-10-12 15:52:46,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:52:46,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:52:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:52:46,648 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2020-10-12 15:52:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:46,966 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-12 15:52:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:52:46,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-12 15:52:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:46,968 INFO L225 Difference]: With dead ends: 72 [2020-10-12 15:52:46,969 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:52:46,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:52:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:52:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-12 15:52:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:52:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-12 15:52:46,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 39 [2020-10-12 15:52:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:46,981 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-12 15:52:46,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:52:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-12 15:52:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:52:46,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:46,982 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-12 15:52:46,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:52:46,983 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1939188081, now seen corresponding path program 2 times [2020-10-12 15:52:46,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:46,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152248113] [2020-10-12 15:52:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:47,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:52,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:52:52,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:52:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:52,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:52,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:52,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:52,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:52,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:52,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:52,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:52,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:52:52,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-12 15:52:52,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:52:52,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:52,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:52:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:52,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:53,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:53,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:52:53,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-12 15:52:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:52:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:54,821 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 177 DAG size of output: 118 [2020-10-12 15:52:55,717 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 125 [2020-10-12 15:52:56,245 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-12 15:52:56,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:56,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:56,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:56,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 15:52:56,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:56,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152248113] [2020-10-12 15:52:56,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:56,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:52:56,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215355378] [2020-10-12 15:52:56,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:52:56,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:52:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:52:56,554 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 26 states. [2020-10-12 15:52:58,038 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-12 15:52:58,925 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 132 [2020-10-12 15:52:59,438 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-12 15:53:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:00,672 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-12 15:53:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:53:00,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2020-10-12 15:53:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:00,674 INFO L225 Difference]: With dead ends: 72 [2020-10-12 15:53:00,674 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:53:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:53:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:53:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-10-12 15:53:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:53:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-12 15:53:00,684 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2020-10-12 15:53:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:00,684 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-12 15:53:00,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:53:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-12 15:53:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:53:00,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:00,685 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:53:00,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:53:00,686 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash 423777671, now seen corresponding path program 1 times [2020-10-12 15:53:00,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:00,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216436136] [2020-10-12 15:53:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:01,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:53:01,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:53:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:01,922 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-12 15:53:02,192 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 33 [2020-10-12 15:53:02,425 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 32 [2020-10-12 15:53:02,643 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2020-10-12 15:53:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:02,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:02,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:02,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:02,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:02,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:02,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:02,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:02,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:02,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:02,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:02,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 15:53:02,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:02,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:53:02,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:02,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:53:02,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:53:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:03,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:03,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:03,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:03,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 15:53:03,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:53:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:04,532 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 115 [2020-10-12 15:53:05,500 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 107 [2020-10-12 15:53:05,868 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-10-12 15:53:05,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:05,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:05,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:53:06,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216436136] [2020-10-12 15:53:06,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:06,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:53:06,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280823932] [2020-10-12 15:53:06,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:53:06,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:53:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:53:06,124 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 25 states. [2020-10-12 15:53:07,676 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 15:53:08,446 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 15:53:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:09,584 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-12 15:53:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:53:09,586 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-10-12 15:53:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:09,587 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:53:09,587 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:53:09,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:53:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:53:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-10-12 15:53:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:53:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-12 15:53:09,600 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 44 [2020-10-12 15:53:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:09,601 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-12 15:53:09,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:53:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-12 15:53:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:53:09,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:09,602 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:09,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:53:09,602 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 423779345, now seen corresponding path program 1 times [2020-10-12 15:53:09,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:09,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271595265] [2020-10-12 15:53:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:11,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:11,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:53:11,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1970 [2020-10-12 15:53:11,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:53:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:53:11,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:12,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:12,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:12,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:12,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:12,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:12,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:12,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:53:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:53:12,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:12,650 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-12 15:53:12,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:53:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:12,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:53:13,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:13,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:13,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:13,536 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-12 15:53:13,981 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 72 [2020-10-12 15:53:14,523 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 93 [2020-10-12 15:53:14,900 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-12 15:53:14,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:14,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:14,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:14,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:14,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:15,503 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-12 15:53:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:53:15,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271595265] [2020-10-12 15:53:15,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:15,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:53:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666499198] [2020-10-12 15:53:15,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:53:15,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:53:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:53:15,566 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 29 states. [2020-10-12 15:53:18,167 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 126 [2020-10-12 15:53:18,755 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-12 15:53:18,973 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-12 15:53:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:19,649 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-12 15:53:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:53:19,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-12 15:53:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:19,651 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:53:19,652 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:53:19,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:53:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:53:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-12 15:53:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:53:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-12 15:53:19,663 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2020-10-12 15:53:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:19,663 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-12 15:53:19,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:53:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-12 15:53:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:53:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:19,664 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:53:19,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:53:19,665 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash 681943109, now seen corresponding path program 1 times [2020-10-12 15:53:19,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:19,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156362330] [2020-10-12 15:53:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:20,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:23,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:23,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:23,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:53:23,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:53:23,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4312 [2020-10-12 15:53:23,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:53:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:53:23,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:24,237 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-12 15:53:24,591 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-10-12 15:53:24,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:24,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:24,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:24,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:24,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:24,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:24,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:24,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:24,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:24,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:24,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:53:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:25,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:53:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:25,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:25,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:25,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:25,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:25,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:53:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-12 15:53:25,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:53:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:25,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:53:26,471 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2020-10-12 15:53:27,604 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 136 [2020-10-12 15:53:27,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:27,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:27,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:53:28,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156362330] [2020-10-12 15:53:28,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:28,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:53:28,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198514207] [2020-10-12 15:53:28,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:53:28,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:53:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:53:28,109 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 24 states. [2020-10-12 15:53:29,786 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 15:53:31,483 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 15:53:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:31,826 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-12 15:53:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:53:31,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 44 [2020-10-12 15:53:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:31,829 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:53:31,829 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:53:31,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:53:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:53:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2020-10-12 15:53:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 15:53:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-12 15:53:31,838 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 44 [2020-10-12 15:53:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:31,839 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-12 15:53:31,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:53:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-12 15:53:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:53:31,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:31,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:31,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:53:31,840 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:31,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -456016510, now seen corresponding path program 3 times [2020-10-12 15:53:31,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:31,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589141174] [2020-10-12 15:53:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:31,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:31,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:35,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3932 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:53:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:36,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:36,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:36,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:36,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:36,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:36,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:36,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:36,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:53:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:53:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:37,916 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 121 [2020-10-12 15:53:38,673 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 123 [2020-10-12 15:53:38,924 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-12 15:53:38,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:38,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:38,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:53:39,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589141174] [2020-10-12 15:53:39,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:39,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:53:39,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812544842] [2020-10-12 15:53:39,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:53:39,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:39,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:53:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:53:39,201 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 27 states. [2020-10-12 15:53:41,733 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 181 DAG size of output: 135 [2020-10-12 15:53:42,321 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 15:53:42,990 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 15:53:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:43,499 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-12 15:53:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:53:43,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2020-10-12 15:53:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:43,500 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:53:43,501 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 15:53:43,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=199, Invalid=2057, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:53:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 15:53:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-10-12 15:53:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 15:53:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-12 15:53:43,513 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2020-10-12 15:53:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:43,513 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-12 15:53:43,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:53:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-12 15:53:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:53:43,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:43,514 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:43,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:53:43,515 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -456014836, now seen corresponding path program 3 times [2020-10-12 15:53:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:43,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956399298] [2020-10-12 15:53:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:43,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:43,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:43,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:47,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3822 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:53:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:47,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:47,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:47,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:47,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:48,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:48,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:53:48,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:48,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 15:53:48,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:53:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:53:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 15:53:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:48,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:48,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:48,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:48,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:50,229 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 228 DAG size of output: 119 [2020-10-12 15:53:51,177 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 75 [2020-10-12 15:53:51,712 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 51 [2020-10-12 15:53:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:51,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:51,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:51,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:51,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:53:51,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:53:51,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956399298] [2020-10-12 15:53:51,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:51,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:53:51,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422372206] [2020-10-12 15:53:51,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:53:51,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:53:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:53:51,992 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 28 states. [2020-10-12 15:53:54,132 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2020-10-12 15:53:54,369 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 15:53:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:55,826 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-12 15:53:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:53:55,826 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2020-10-12 15:53:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:55,827 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:53:55,827 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:53:55,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:53:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:53:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-12 15:53:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:53:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-12 15:53:55,838 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2020-10-12 15:53:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:55,838 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-12 15:53:55,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:53:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-12 15:53:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:53:55,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:55,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 15:53:55,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:53:55,840 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -769898462, now seen corresponding path program 2 times [2020-10-12 15:53:55,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:55,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843040850] [2020-10-12 15:53:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:55,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:56,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:53:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:56,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:56,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:56,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:56,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:56,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:56,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:53:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:56,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:53:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:56,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:56,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:56,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:56,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:53:56,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:56,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:56,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:56,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:56,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:56,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:53:56,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:53:56,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843040850] [2020-10-12 15:53:56,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:56,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:53:56,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683338101] [2020-10-12 15:53:56,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:53:56,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:53:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:53:56,489 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 14 states. [2020-10-12 15:53:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:56,972 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-12 15:53:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:53:56,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-12 15:53:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:56,974 INFO L225 Difference]: With dead ends: 92 [2020-10-12 15:53:56,974 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:53:56,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:53:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:53:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-12 15:53:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:53:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-12 15:53:56,984 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 46 [2020-10-12 15:53:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:56,984 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-12 15:53:56,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:53:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-12 15:53:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:53:56,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:56,985 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-12 15:53:56,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:53:56,985 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash -769896788, now seen corresponding path program 2 times [2020-10-12 15:53:56,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:56,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408144189] [2020-10-12 15:53:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:57,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:00,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:54:00,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3899 [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:54:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:01,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:01,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:01,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:01,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:01,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:01,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:01,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:01,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:01,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:01,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:54:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:02,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:54:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:02,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:02,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:54:02,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:03,267 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 83 [2020-10-12 15:54:04,161 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-12 15:54:05,284 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2020-10-12 15:54:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:05,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:05,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:06,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408144189] [2020-10-12 15:54:06,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:06,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:54:06,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959838484] [2020-10-12 15:54:06,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:54:06,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:54:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:54:06,006 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 31 states. [2020-10-12 15:54:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:09,297 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-12 15:54:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:54:09,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2020-10-12 15:54:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:09,298 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:54:09,298 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:54:09,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 15:54:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:54:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-12 15:54:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:54:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-12 15:54:09,309 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2020-10-12 15:54:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:09,310 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-12 15:54:09,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:54:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-12 15:54:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:54:09,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:09,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-12 15:54:09,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:54:09,311 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash 819947532, now seen corresponding path program 3 times [2020-10-12 15:54:09,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:09,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353275456] [2020-10-12 15:54:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:11,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:54:11,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:12,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:12,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:12,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:12,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:12,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:12,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:12,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:12,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:12,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:12,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:12,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:12,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-12 15:54:12,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:54:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:54:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:13,132 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-12 15:54:14,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 15:54:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:14,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:14,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:54:14,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:14,924 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2020-10-12 15:54:15,715 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 90 [2020-10-12 15:54:17,212 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 180 DAG size of output: 122 [2020-10-12 15:54:18,857 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 161 DAG size of output: 130 [2020-10-12 15:54:19,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:19,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:19,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:19,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:20,307 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-12 15:54:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:20,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353275456] [2020-10-12 15:54:20,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:20,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 15:54:20,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799788033] [2020-10-12 15:54:20,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 15:54:20,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 15:54:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:54:20,339 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 35 states. [2020-10-12 15:54:22,101 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2020-10-12 15:54:22,669 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-12 15:54:22,939 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 15:54:23,442 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2020-10-12 15:54:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:25,808 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-12 15:54:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:54:25,809 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2020-10-12 15:54:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:25,810 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:54:25,810 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:54:25,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:54:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:54:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-10-12 15:54:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:54:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-12 15:54:25,821 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2020-10-12 15:54:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:25,822 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-12 15:54:25,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 15:54:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-12 15:54:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:54:25,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:25,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-10-12 15:54:25,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:54:25,825 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1990607197, now seen corresponding path program 3 times [2020-10-12 15:54:25,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:25,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17143430] [2020-10-12 15:54:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:25,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:26,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:26,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:54:26,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-12 15:54:26,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:54:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:54:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:54:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:26,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:26,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:26,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:26,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:54:26,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:26,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:26,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:26,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:26,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:54:26,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:27,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:27,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:27,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:27,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 15:54:27,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:54:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:54:27,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:54:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 15:54:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:27,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:54:27,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:54:27,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:54:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:54:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:27,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:27,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:27,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:27,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:27,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:54:27,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:27,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:27,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:27,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:27,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:54:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:27,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17143430] [2020-10-12 15:54:27,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:27,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:54:27,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557648138] [2020-10-12 15:54:27,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:54:27,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:54:27,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:54:27,263 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 16 states. [2020-10-12 15:54:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:27,804 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-12 15:54:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:54:27,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-12 15:54:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:27,806 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:54:27,806 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 15:54:27,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:54:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 15:54:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-10-12 15:54:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 15:54:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-12 15:54:27,833 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 53 [2020-10-12 15:54:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:27,834 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-12 15:54:27,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:54:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-12 15:54:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:54:27,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:27,835 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 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] [2020-10-12 15:54:27,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:54:27,835 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1990608871, now seen corresponding path program 4 times [2020-10-12 15:54:27,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:27,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702975940] [2020-10-12 15:54:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:32,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:54:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:54:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 15:54:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 15:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:54:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:33,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:33,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:33,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:33,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:33,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:33,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:33,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:54:33,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:33,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:34,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:34,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:54:34,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:36,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 15:54:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:54:36,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:36,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:54:36,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:37,147 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-12 15:54:37,946 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-12 15:54:39,178 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 97 [2020-10-12 15:54:41,233 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 153 DAG size of output: 142 [2020-10-12 15:54:41,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:41,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:41,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:54:42,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702975940] [2020-10-12 15:54:42,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:42,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 15:54:42,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89196478] [2020-10-12 15:54:42,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 15:54:42,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 15:54:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1254, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:54:42,374 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 37 states. [2020-10-12 15:54:44,071 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-12 15:54:44,680 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 15:54:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:47,615 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-12 15:54:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 15:54:47,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 53 [2020-10-12 15:54:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:47,618 INFO L225 Difference]: With dead ends: 85 [2020-10-12 15:54:47,618 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 15:54:47,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=201, Invalid=3105, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 15:54:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 15:54:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-12 15:54:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:54:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-12 15:54:47,630 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-10-12 15:54:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:47,630 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-12 15:54:47,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 15:54:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-12 15:54:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:54:47,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:47,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:54:47,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:54:47,632 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2018892797, now seen corresponding path program 4 times [2020-10-12 15:54:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:47,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065474865] [2020-10-12 15:54:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:47,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 15:54:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 15:54:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:53,004 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-12 15:54:53,196 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-12 15:54:53,821 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-10-12 15:54:54,460 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 66 [2020-10-12 15:54:54,825 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-12 15:54:55,154 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2020-10-12 15:54:55,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:55,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:55,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:55,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:55,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:55,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:55,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:55,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:55,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:56,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:54:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:56,765 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-12 15:54:57,030 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 15:54:57,606 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-12 15:54:57,894 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-12 15:54:58,110 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-12 15:54:58,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:54:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:58,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:58,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:54:58,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:58,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-12 15:54:58,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:54:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:58,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:54:58,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:02,285 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-12 15:55:05,258 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 311 DAG size of output: 138 [2020-10-12 15:55:10,427 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 328 DAG size of output: 166 [2020-10-12 15:55:43,514 WARN L193 SmtUtils]: Spent 31.35 s on a formula simplification. DAG size of input: 699 DAG size of output: 270 [2020-10-12 15:55:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:55:45,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:45,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:45,985 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-12 15:55:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:55:46,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065474865] [2020-10-12 15:55:46,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:46,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 15:55:46,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333097145] [2020-10-12 15:55:46,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 15:55:46,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 15:55:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:55:46,037 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 37 states. [2020-10-12 15:55:48,317 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-12 15:55:48,683 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 15:55:48,971 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-12 15:55:49,606 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 65 [2020-10-12 15:55:50,158 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2020-10-12 15:55:50,627 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-12 15:55:51,008 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-12 15:55:51,718 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 131 [2020-10-12 15:55:53,848 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-12 15:55:54,458 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 133 [2020-10-12 15:55:55,211 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 198 [2020-10-12 15:55:56,001 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 177 [2020-10-12 15:55:56,698 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2020-10-12 15:55:57,078 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2020-10-12 15:55:57,475 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2020-10-12 15:55:57,856 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-12 15:55:58,260 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-12 15:55:58,616 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-12 15:55:58,969 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-12 15:55:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:55:59,004 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-12 15:55:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 15:55:59,006 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 58 [2020-10-12 15:55:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:55:59,007 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:55:59,007 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:55:59,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 15:55:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:55:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-12 15:55:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:55:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-12 15:55:59,022 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 58 [2020-10-12 15:55:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:55:59,022 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-12 15:55:59,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 15:55:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-12 15:55:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:55:59,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:55:59,023 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:55:59,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:55:59,023 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:55:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:55:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2018894471, now seen corresponding path program 5 times [2020-10-12 15:55:59,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:55:59,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170139552] [2020-10-12 15:55:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:55:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:59,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:04,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:04,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:56:04,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:56:04,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 15:56:04,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 15:56:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:56:04,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:04,984 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 83 [2020-10-12 15:56:05,619 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-10-12 15:56:06,276 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 64 [2020-10-12 15:56:07,036 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 62 [2020-10-12 15:56:07,687 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 64 [2020-10-12 15:56:08,403 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 65 [2020-10-12 15:56:08,720 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-10-12 15:56:08,919 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-12 15:56:09,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:09,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:09,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:09,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:09,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:09,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:09,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:56:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:10,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:56:10,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:11,191 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-12 15:56:11,818 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 15:56:12,167 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 15:56:12,452 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-12 15:56:12,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:56:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:13,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:13,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:13,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:56:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:14,161 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-12 15:56:15,682 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 173 DAG size of output: 83