/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_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:52:13,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:52:13,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:52:13,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:52:13,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:52:13,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:52:13,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:52:13,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:52:13,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:52:13,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:52:13,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:52:13,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:52:13,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:52:13,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:52:13,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:52:13,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:52:13,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:52:13,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:52:14,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:52:14,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:52:14,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:52:14,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:52:14,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:52:14,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:52:14,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:52:14,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:52:14,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:52:14,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:52:14,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:52:14,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:52:14,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:52:14,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:52:14,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:52:14,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:52:14,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:52:14,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:52:14,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:52:14,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:52:14,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:52:14,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:52:14,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:52:14,055 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 15:52:14,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:52:14,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:52:14,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:52:14,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:52:14,100 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:52:14,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:52:14,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:52:14,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:52:14,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:52:14,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:52:14,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:52:14,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:52:14,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:52:14,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:52:14,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:52:14,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:52:14,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:52:14,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:52:14,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:52:14,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:52:14,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:52:14,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:52:14,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:52:14,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:52:14,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:52:14,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:52:14,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:52:14,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:52:14,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:52:14,109 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 15:52:14,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:52:14,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:52:14,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:52:14,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:52:14,450 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:52:14,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2020-10-12 15:52:14,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae4ef6714/1640475a23e74f7ab70d985765032a45/FLAG1d7da4e23 [2020-10-12 15:52:15,128 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:52:15,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2020-10-12 15:52:15,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae4ef6714/1640475a23e74f7ab70d985765032a45/FLAG1d7da4e23 [2020-10-12 15:52:15,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae4ef6714/1640475a23e74f7ab70d985765032a45 [2020-10-12 15:52:15,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:52:15,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:52:15,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:15,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:52:15,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:52:15,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:15" (1/1) ... [2020-10-12 15:52:15,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586375c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:15, skipping insertion in model container [2020-10-12 15:52:15,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:52:15" (1/1) ... [2020-10-12 15:52:15,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:52:15,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:52:16,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:16,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:52:16,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:52:16,173 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:52:16,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16 WrapperNode [2020-10-12 15:52:16,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:52:16,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:52:16,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:52:16,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:52:16,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (1/1) ... [2020-10-12 15:52:16,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:52:16,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:52:16,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:52:16,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:52:16,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (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 15:52:16,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:52:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:52:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:52:16,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:52:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:52:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-12 15:52:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-12 15:52:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-12 15:52:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2020-10-12 15:52:16,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:52:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:52:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:52:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:52:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:52:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:52:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:52:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:52:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:52:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:52:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:52:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:52:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:52:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:52:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:52:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:52:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:52:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:52:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:52:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:52:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:52:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:52:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:52:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:52:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:52:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:52:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:52:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:52:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:52:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:52:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:52:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:52:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:52:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:52:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:52:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:52:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:52:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:52:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:52:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:52:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:52:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:52:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:52:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-12 15:52:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:52:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:52:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:52:16,831 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:52:16,991 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:52:16,992 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 15:52:16,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:16 BoogieIcfgContainer [2020-10-12 15:52:16,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:52:16,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:52:16,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:52:17,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:52:17,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:52:15" (1/3) ... [2020-10-12 15:52:17,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c44f9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:17, skipping insertion in model container [2020-10-12 15:52:17,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:52:16" (2/3) ... [2020-10-12 15:52:17,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c44f9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:52:17, skipping insertion in model container [2020-10-12 15:52:17,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:52:16" (3/3) ... [2020-10-12 15:52:17,008 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2020-10-12 15:52:17,021 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:52:17,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:52:17,049 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:52:17,080 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:52:17,081 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:52:17,081 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:52:17,081 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:52:17,081 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:52:17,081 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:52:17,082 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:52:17,082 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:52:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-12 15:52:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:52:17,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:17,125 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] [2020-10-12 15:52:17,126 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:17,135 INFO L82 PathProgramCache]: Analyzing trace with hash -683309345, now seen corresponding path program 1 times [2020-10-12 15:52:17,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:17,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124290638] [2020-10-12 15:52:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:17,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:18,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:18,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:52:18,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:18,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-12 15:52:18,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:18,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:18,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:52:18,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:52:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:52:19,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:19,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:19,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:52:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:19,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:19,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:19,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:52:19,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:52:19,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:19,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-12 15:52:19,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:52:19,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:52:19,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:19,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:19,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:19,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:19,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:19,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 15:52:19,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:19,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:19,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:19,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:19,643 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 15:52:19,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124290638] [2020-10-12 15:52:19,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:19,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 15:52:19,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678951835] [2020-10-12 15:52:19,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:52:19,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:19,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:52:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:52:19,686 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 12 states. [2020-10-12 15:52:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:20,296 INFO L93 Difference]: Finished difference Result 108 states and 147 transitions. [2020-10-12 15:52:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:52:20,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-12 15:52:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:20,352 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:52:20,352 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:52:20,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:52:20,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:52:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-12 15:52:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:52:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-12 15:52:20,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 29 [2020-10-12 15:52:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:20,424 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-12 15:52:20,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:52:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-12 15:52:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:52:20,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:20,427 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] [2020-10-12 15:52:20,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:52:20,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -683307671, now seen corresponding path program 1 times [2020-10-12 15:52:20,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:20,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869175069] [2020-10-12 15:52:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:20,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:20,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:20,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:52:20,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:20,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-12 15:52:20,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:20,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:52:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:52:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:20,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:20,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:20,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:20,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:20,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:52:20,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:20,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:21,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:21,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:21,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:21,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:52:21,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:52:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:21,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:21,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:21,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:21,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:21,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:52:21,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:21,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-12 15:52:21,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:21,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:52:21,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:21,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:52:21,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:21,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:21,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:21,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:21,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:21,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 15:52:21,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:21,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:21,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:21,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:52:21,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:21,506 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 15:52:21,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869175069] [2020-10-12 15:52:21,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 15:52:21,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237255274] [2020-10-12 15:52:21,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:52:21,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:52:21,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:52:21,513 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 14 states. [2020-10-12 15:52:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:22,331 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-12 15:52:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:52:22,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 15:52:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:22,334 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:52:22,334 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:52:22,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:52:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:52:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-10-12 15:52:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:52:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-12 15:52:22,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 29 [2020-10-12 15:52:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:22,346 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-12 15:52:22,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:52:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-12 15:52:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:52:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:22,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:22,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:52:22,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash 471369338, now seen corresponding path program 1 times [2020-10-12 15:52:22,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:22,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660066060] [2020-10-12 15:52:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:52:22,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-12 15:52:22,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:22,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:22,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:22,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:22,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:22,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:52:22,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:22,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:22,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:52:22,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:52:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:22,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:52:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:52:22,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:52:22,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:52:22,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:22,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:22,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:22,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:52:22,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:22,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:22,708 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 15:52:22,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660066060] [2020-10-12 15:52:22,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:52:22,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:52:22,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056849168] [2020-10-12 15:52:22,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:52:22,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:52:22,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:52:22,713 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 7 states. [2020-10-12 15:52:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:22,933 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-12 15:52:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:52:22,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-12 15:52:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:22,934 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:52:22,935 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:52:22,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:52:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:52:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-12 15:52:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:52:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 15:52:22,945 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 31 [2020-10-12 15:52:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:22,945 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 15:52:22,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:52:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 15:52:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:52:22,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:22,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:22,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:52:22,947 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1031907822, now seen corresponding path program 1 times [2020-10-12 15:52:22,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:22,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804729497] [2020-10-12 15:52:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:22,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:22,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:26,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:26,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:52:26,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:52:26,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3971 [2020-10-12 15:52:26,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:52:26,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:26,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:52:26,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:27,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:27,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:27,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:27,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:27,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:27,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:27,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:27,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:27,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:27,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-12 15:52:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:27,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:52:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:27,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:27,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:27,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:27,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:27,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:52:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:27,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:27,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:52:28,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-12 15:52:28,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:52:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:28,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:28,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:28,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 15:52:28,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:28,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804729497] [2020-10-12 15:52:28,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:28,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:52:28,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876795108] [2020-10-12 15:52:28,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:52:28,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:28,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:52:28,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:52:28,314 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 23 states. [2020-10-12 15:52:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:29,713 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-12 15:52:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:52:29,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-12 15:52:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:29,715 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:52:29,715 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:52:29,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:52:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:52:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-12 15:52:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:52:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-12 15:52:29,725 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 41 [2020-10-12 15:52:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:29,726 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-12 15:52:29,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:52:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-12 15:52:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:52:29,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:29,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:29,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:52:29,728 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1172456432, now seen corresponding path program 1 times [2020-10-12 15:52:29,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:29,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178934439] [2020-10-12 15:52:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:52:31,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:31,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1655 [2020-10-12 15:52:31,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:52:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:31,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:52:31,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:31,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:31,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:31,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:31,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:31,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:31,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 15:52:31,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:31,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:31,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:31,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:31,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:52:31,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:52:31,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:31,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 15:52:31,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:31,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:52:31,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:31,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:31,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:31,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:31,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:31,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:31,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:52:31,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:31,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:31,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:52:31,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178934439] [2020-10-12 15:52:31,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:31,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:52:31,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522251739] [2020-10-12 15:52:31,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:52:32,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:52:32,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:52:32,001 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 19 states. [2020-10-12 15:52:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:32,869 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-10-12 15:52:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:52:32,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-12 15:52:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:32,874 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:52:32,874 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 15:52:32,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:52:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 15:52:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-12 15:52:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:52:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-12 15:52:32,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2020-10-12 15:52:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:32,883 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-12 15:52:32,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:52:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-12 15:52:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:52:32,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:32,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:32,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:52:32,885 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:32,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:32,885 INFO L82 PathProgramCache]: Analyzing trace with hash -933893876, now seen corresponding path program 1 times [2020-10-12 15:52:32,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:32,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666027628] [2020-10-12 15:52:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:32,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:35,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:37,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:37,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:52:37,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:52:37,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:52:37,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:37,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:52:37,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:52:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:38,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:38,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:38,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:38,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-12 15:52:38,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:52:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:38,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:38,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:38,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 15:52:38,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:38,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:38,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:39,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:52:39,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-12 15:52:39,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:52:39,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:39,528 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 15:52:39,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:39,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:39,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:39,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:39,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:39,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:52:39,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:39,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:39,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666027628] [2020-10-12 15:52:39,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:39,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:52:39,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503556749] [2020-10-12 15:52:39,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:52:39,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:52:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:52:39,685 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 22 states. [2020-10-12 15:52:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:40,728 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-12 15:52:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:52:40,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-12 15:52:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:40,730 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:52:40,730 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:52:40,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:52:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:52:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-12 15:52:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:52:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-12 15:52:40,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 42 [2020-10-12 15:52:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:40,741 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-12 15:52:40,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:52:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-12 15:52:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:52:40,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:40,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:40,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:52:40,743 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:40,743 INFO L82 PathProgramCache]: Analyzing trace with hash -933892202, now seen corresponding path program 1 times [2020-10-12 15:52:40,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:40,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167330327] [2020-10-12 15:52:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:40,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:41,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:41,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:52:41,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:52:41,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-12 15:52:41,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:41,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:52:41,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:41,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:52:41,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:42,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:42,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:42,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:42,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:42,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:42,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-12 15:52:42,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:42,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:52:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:52:42,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:42,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:42,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:42,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 15:52:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:42,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:42,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:42,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:42,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-12 15:52:42,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:52:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:42,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:43,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:43,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:43,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:43,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-12 15:52:43,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:43,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:43,295 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-12 15:52:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:43,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167330327] [2020-10-12 15:52:43,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:43,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:52:43,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940329288] [2020-10-12 15:52:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:52:43,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:52:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:52:43,317 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 21 states. [2020-10-12 15:52:44,802 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-12 15:52:45,079 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2020-10-12 15:52:45,369 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-12 15:52:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:45,559 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-12 15:52:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:52:45,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-12 15:52:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:45,561 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:52:45,562 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 15:52:45,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:52:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 15:52:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-12 15:52:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:52:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-12 15:52:45,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 42 [2020-10-12 15:52:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:45,575 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-12 15:52:45,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:52:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-12 15:52:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:52:45,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:45,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:45,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:52:45,577 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash -871852588, now seen corresponding path program 1 times [2020-10-12 15:52:45,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:45,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115968542] [2020-10-12 15:52:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:52:46,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-12 15:52:46,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:52:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:52:46,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:46,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:46,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:52:46,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:46,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:52:46,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:52:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:52:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:46,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:46,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:46,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:46,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:52:46,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 15:52:46,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:46,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:52:46,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:46,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:52:46,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:47,188 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-12 15:52:47,440 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:52:47,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:47,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:47,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:47,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:47,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 15:52:47,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:52:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:47,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:47,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:48,124 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2020-10-12 15:52:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:48,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115968542] [2020-10-12 15:52:48,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:48,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:52:48,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830752437] [2020-10-12 15:52:48,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:52:48,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:52:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:52:48,140 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 24 states. [2020-10-12 15:52:49,565 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2020-10-12 15:52:49,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:49,926 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-12 15:52:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:52:49,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-12 15:52:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:49,929 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:52:49,929 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:52:49,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:52:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:52:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-12 15:52:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:52:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-12 15:52:49,952 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2020-10-12 15:52:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:49,953 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-12 15:52:49,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:52:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-12 15:52:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:52:49,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:49,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:49,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:52:49,957 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1024703623, now seen corresponding path program 1 times [2020-10-12 15:52:49,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:49,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284635475] [2020-10-12 15:52:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:49,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:51,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:54,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:52:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:52:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:55,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:55,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:55,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:55,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:52:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:55,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:52:55,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:52:55,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:55,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:52:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:55,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:55,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:55,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:52:55,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:52:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:52:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:55,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:52:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:56,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:56,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:52:56,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:52:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-10-12 15:52:56,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:52:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:52:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:56,890 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-12 15:52:57,049 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 15:52:57,337 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 15:52:57,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:52:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:57,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:52:57,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:52:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:52:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:57,677 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-12 15:52:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:52:57,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284635475] [2020-10-12 15:52:57,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:57,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:52:57,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515155822] [2020-10-12 15:52:57,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:52:57,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:52:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:52:57,714 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 25 states. [2020-10-12 15:52:59,015 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-12 15:52:59,258 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-12 15:52:59,524 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-12 15:52:59,865 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-12 15:53:00,174 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-10-12 15:53:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:00,604 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-12 15:53:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:53:00,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2020-10-12 15:53:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:00,607 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:53:00,608 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 15:53:00,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:53:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 15:53:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-12 15:53:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:53:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-12 15:53:00,622 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 44 [2020-10-12 15:53:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:00,622 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-12 15:53:00,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:53:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-12 15:53:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:53:00,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:00,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:00,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:53:00,624 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1024705297, now seen corresponding path program 1 times [2020-10-12 15:53:00,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:00,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826832479] [2020-10-12 15:53:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:53:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:53:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:00,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:00,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:53:00,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:00,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:00,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:53:00,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:53:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 15:53:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:00,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:00,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:00,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:53:00,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:00,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:00,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:00,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:00,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 15:53:00,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826832479] [2020-10-12 15:53:00,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:00,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:53:00,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802488079] [2020-10-12 15:53:00,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:53:00,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:53:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:53:00,925 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 8 states. [2020-10-12 15:53:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:01,105 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-10-12 15:53:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:53:01,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-12 15:53:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:01,107 INFO L225 Difference]: With dead ends: 107 [2020-10-12 15:53:01,107 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:53:01,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:53:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:53:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-10-12 15:53:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:53:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-12 15:53:01,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2020-10-12 15:53:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:01,126 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-12 15:53:01,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:53:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-12 15:53:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:53:01,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:01,128 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:01,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:53:01,128 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 425384989, now seen corresponding path program 2 times [2020-10-12 15:53:01,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:01,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755855808] [2020-10-12 15:53:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2463 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:53:03,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:03,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:03,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:03,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:03,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:03,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:03,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:03,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:03,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:53:04,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:04,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-12 15:53:04,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:53:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:53:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:04,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:04,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:53:04,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:04,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:53:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:04,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:53:04,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:53:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:04,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:53:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:04,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:53:04,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:05,335 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 15:53:05,594 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-12 15:53:05,854 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 15:53:06,490 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2020-10-12 15:53:07,804 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 152 DAG size of output: 136 [2020-10-12 15:53:07,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:07,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:08,644 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 41 [2020-10-12 15:53:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:08,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755855808] [2020-10-12 15:53:08,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:08,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:53:08,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984091595] [2020-10-12 15:53:08,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:53:08,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:08,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:53:08,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:53:08,674 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 31 states. [2020-10-12 15:53:09,509 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 15:53:10,758 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 15:53:12,363 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-12 15:53:12,699 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-10-12 15:53:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:13,158 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-12 15:53:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:53:13,159 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 54 [2020-10-12 15:53:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:13,160 INFO L225 Difference]: With dead ends: 62 [2020-10-12 15:53:13,160 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:53:13,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:53:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:53:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-12 15:53:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:53:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-12 15:53:13,172 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 54 [2020-10-12 15:53:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:13,173 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-12 15:53:13,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:53:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-12 15:53:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:53:13,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:13,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:13,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:53:13,175 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:13,175 INFO L82 PathProgramCache]: Analyzing trace with hash 773126190, now seen corresponding path program 1 times [2020-10-12 15:53:13,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:13,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202122951] [2020-10-12 15:53:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:13,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:16,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:18,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:18,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:53:18,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:18,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:18,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:18,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:18,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:18,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:18,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:18,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:18,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:18,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:53:18,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-12 15:53:18,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:53:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:18,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:53:18,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:19,040 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 15:53:19,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:19,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:53:19,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:19,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:53:19,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:19,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:53:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:19,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:19,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:19,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:53:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:19,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:20,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:20,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:53:20,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:20,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-12 15:53:20,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:53:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:53:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:53:20,549 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-12 15:53:20,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:20,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:20,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:20,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:20,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 15:53:20,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:20,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:20,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:20,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:53:21,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202122951] [2020-10-12 15:53:21,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:21,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:53:21,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923646442] [2020-10-12 15:53:21,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:53:21,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:53:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:53:21,177 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 28 states. [2020-10-12 15:53:21,932 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 15:53:23,216 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-12 15:53:23,647 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-12 15:53:23,869 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-12 15:53:24,208 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 15:53:24,568 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-12 15:53:24,928 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-12 15:53:25,288 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-12 15:53:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:25,554 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-12 15:53:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:53:25,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-12 15:53:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:25,559 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:53:25,559 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 15:53:25,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:53:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 15:53:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-12 15:53:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:53:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-12 15:53:25,578 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 56 [2020-10-12 15:53:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:25,579 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-12 15:53:25,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:53:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-12 15:53:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:53:25,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:25,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:25,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:53:25,580 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1620026190, now seen corresponding path program 2 times [2020-10-12 15:53:25,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:25,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228861719] [2020-10-12 15:53:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:25,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:26,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:26,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:27,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:30,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:30,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:53:30,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 15:53:30,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 15:53:30,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:53:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:53:30,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:30,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:30,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:30,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:30,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:30,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:30,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:30,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:30,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:30,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:31,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:31,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:53:31,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:31,632 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-12 15:53:31,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:31,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:53:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:31,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:53:31,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:53:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:31,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:31,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:31,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 15:53:31,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:31,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:32,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:53:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:32,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:33,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:33,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:53:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:33,630 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 15:53:34,546 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-12 15:53:34,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:34,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:34,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:53:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:34,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:34,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:34,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228861719] [2020-10-12 15:53:34,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:34,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:53:34,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056289790] [2020-10-12 15:53:34,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:53:34,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:53:34,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:53:34,852 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 32 states. [2020-10-12 15:53:35,628 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-12 15:53:36,550 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-12 15:53:36,795 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-12 15:53:37,231 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-12 15:53:37,880 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-12 15:53:38,175 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 15:53:38,463 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-12 15:53:38,875 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-12 15:53:39,189 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-12 15:53:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:39,660 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-12 15:53:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:53:39,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2020-10-12 15:53:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:39,662 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:53:39,663 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:53:39,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 15:53:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:53:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-12 15:53:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:53:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-12 15:53:39,677 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 56 [2020-10-12 15:53:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:39,677 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-12 15:53:39,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:53:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-12 15:53:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:53:39,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:39,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 15:53:39,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:53:39,679 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:39,679 INFO L82 PathProgramCache]: Analyzing trace with hash -598681108, now seen corresponding path program 1 times [2020-10-12 15:53:39,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:39,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41746554] [2020-10-12 15:53:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:41,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:44,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:44,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:53:44,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:53:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-12 15:53:44,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 15:53:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:53:44,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:53:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:45,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:45,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:45,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:45,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:53:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:53:46,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:46,935 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-12 15:53:47,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:47,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:47,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:53:47,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:47,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:47,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:47,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:53:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:47,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:53:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:48,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:53:48,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:49,412 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 15:53:49,771 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-12 15:53:50,415 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 115 [2020-10-12 15:53:52,216 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 303 DAG size of output: 112 [2020-10-12 15:53:52,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:52,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:52,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:53:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:53:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:53:52,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41746554] [2020-10-12 15:53:52,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:53:52,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:53:52,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640839928] [2020-10-12 15:53:52,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:53:52,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:53:52,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:53:52,595 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 28 states. [2020-10-12 15:53:53,308 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 15:53:54,421 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 15:53:55,768 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-12 15:53:57,685 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 200 DAG size of output: 149 [2020-10-12 15:53:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:58,445 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-12 15:53:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:53:58,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-12 15:53:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:58,447 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:53:58,448 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 15:53:58,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=186, Invalid=1976, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:53:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 15:53:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-12 15:53:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:53:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-12 15:53:58,462 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 56 [2020-10-12 15:53:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:58,463 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-12 15:53:58,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:53:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-12 15:53:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:53:58,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:58,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:58,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:53:58,464 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1620027864, now seen corresponding path program 3 times [2020-10-12 15:53:58,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:58,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637641476] [2020-10-12 15:53:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:53:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:53:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:53:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:53:58,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:53:58,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:53:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:53:58,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:53:58,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:53:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:53:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:58,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:53:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:53:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:53:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:53:58,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:53:58,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 15:53:58,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:58,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:53:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:53:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:53:58,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:53:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:53:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:53:58,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:53:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:53:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-12 15:53:58,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637641476] [2020-10-12 15:53:58,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:53:58,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:53:58,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483592048] [2020-10-12 15:53:58,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:53:58,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:53:58,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:53:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:53:58,676 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 5 states. [2020-10-12 15:53:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:53:58,832 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2020-10-12 15:53:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:53:58,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-12 15:53:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:53:58,834 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:53:58,835 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:53:58,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:53:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:53:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 15:53:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 15:53:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-12 15:53:58,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 56 [2020-10-12 15:53:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:53:58,849 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-12 15:53:58,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:53:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-12 15:53:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:53:58,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:53:58,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:53:58,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:53:58,851 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:53:58,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:53:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash -598679434, now seen corresponding path program 1 times [2020-10-12 15:53:58,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:53:58,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396328863] [2020-10-12 15:53:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:53:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:53:58,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:00,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2673 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:01,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 15:54:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:01,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:01,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:01,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:01,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:01,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:01,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:01,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:02,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:54:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:02,717 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-10-12 15:54:02,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:54:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:02,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:02,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:02,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:54:02,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:54:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:54:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:54:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:03,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:03,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:03,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:03,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 15:54:03,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:03,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:03,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:03,498 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 15:54:03,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:54:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:03,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:03,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:54:03,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:54:03,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:04,553 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-12 15:54:05,304 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2020-10-12 15:54:05,846 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-12 15:54:06,557 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-10-12 15:54:07,481 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-10-12 15:54:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:07,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:07,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:08,422 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-12 15:54:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:54:08,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396328863] [2020-10-12 15:54:08,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:08,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:54:08,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131908044] [2020-10-12 15:54:08,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:54:08,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:54:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:54:08,465 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 32 states. [2020-10-12 15:54:09,316 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 15:54:10,455 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-12 15:54:11,204 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 15:54:12,049 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-12 15:54:12,299 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 15:54:12,601 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-12 15:54:12,932 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-12 15:54:13,755 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-12 15:54:14,360 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-12 15:54:15,269 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 96 [2020-10-12 15:54:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:16,177 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-12 15:54:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:54:16,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2020-10-12 15:54:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:16,181 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:54:16,181 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:54:16,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=218, Invalid=2538, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 15:54:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:54:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-12 15:54:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:54:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 15:54:16,194 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 56 [2020-10-12 15:54:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:16,195 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 15:54:16,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:54:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 15:54:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:54:16,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:16,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-12 15:54:16,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:54:16,197 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 248218892, now seen corresponding path program 1 times [2020-10-12 15:54:16,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:16,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897727462] [2020-10-12 15:54:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:16,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:16,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:16,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:18,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:54:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:54:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-12 15:54:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:54:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:54:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:21,501 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-12 15:54:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:21,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:21,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:21,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:21,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:22,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:22,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:54:22,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:54:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-12 15:54:22,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:54:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:22,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:54:22,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:23,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:54:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:23,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:23,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:23,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:54:23,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:23,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:54:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 15:54:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:54:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:54:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:24,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:54:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:24,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:54:24,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:24,779 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-12 15:54:25,394 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:54:25,830 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-12 15:54:26,504 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2020-10-12 15:54:27,476 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2020-10-12 15:54:28,786 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 140 DAG size of output: 112 [2020-10-12 15:54:29,857 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 103 [2020-10-12 15:54:30,647 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 50 [2020-10-12 15:54:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:54:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:30,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:54:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:30,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:30,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:31,119 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2020-10-12 15:54:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:54:31,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897727462] [2020-10-12 15:54:31,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:54:31,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:54:31,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108377898] [2020-10-12 15:54:31,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:54:31,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:54:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:54:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:54:31,180 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 33 states. [2020-10-12 15:54:31,456 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-12 15:54:31,799 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 15:54:32,469 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-12 15:54:32,770 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-12 15:54:33,612 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-12 15:54:34,893 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 15:54:35,332 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-12 15:54:35,812 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-12 15:54:36,602 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-10-12 15:54:37,631 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2020-10-12 15:54:38,424 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-10-12 15:54:38,889 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-12 15:54:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:54:39,668 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-12 15:54:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:54:39,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2020-10-12 15:54:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:54:39,670 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:54:39,670 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:54:39,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=291, Invalid=3249, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 15:54:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:54:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-12 15:54:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:54:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-12 15:54:39,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 56 [2020-10-12 15:54:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:54:39,686 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-12 15:54:39,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:54:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-12 15:54:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:54:39,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:54:39,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-12 15:54:39,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:54:39,688 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:54:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:54:39,688 INFO L82 PathProgramCache]: Analyzing trace with hash 248220566, now seen corresponding path program 1 times [2020-10-12 15:54:39,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:54:39,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570593934] [2020-10-12 15:54:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:54:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:39,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:40,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:42,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3142 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:54:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 15:54:42,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:42,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:54:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:54:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:54:42,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:43,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:54:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:43,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:54:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:54:43,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:43,812 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-12 15:54:44,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:54:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:44,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:44,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:44,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:54:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:54:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:44,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:44,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:44,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:54:44,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:44,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:54:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:54:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:54:44,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:54:44,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:54:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:54:46,046 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-12 15:54:46,686 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-12 15:54:47,445 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-12 15:54:48,267 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2020-10-12 15:54:49,130 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-10-12 15:55:19,702 WARN L193 SmtUtils]: Spent 24.93 s on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2020-10-12 15:55:22,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:55:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:55:22,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:55:22,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:55:22,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:55:22,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:55:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:55:23,674 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-10-12 15:55:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:55:23,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570593934] [2020-10-12 15:55:23,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:55:23,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:55:23,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923796518] [2020-10-12 15:55:23,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:55:23,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:55:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:55:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:55:23,718 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 32 states. [2020-10-12 15:55:33,759 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification that was a NOOP. DAG size: 151 [2020-10-12 15:55:34,766 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-12 15:55:40,192 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 15:55:51,797 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-12 15:55:53,115 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2020-10-12 15:55:54,335 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-10-12 15:56:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:56:02,828 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-12 15:56:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:56:02,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2020-10-12 15:56:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:56:02,833 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:56:02,834 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:56:02,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=170, Invalid=2182, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:56:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:56:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-10-12 15:56:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 15:56:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-10-12 15:56:02,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 56 [2020-10-12 15:56:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:56:02,853 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-10-12 15:56:02,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:56:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-10-12 15:56:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:56:02,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:56:02,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:56:02,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:56:02,855 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:56:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:56:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 194726471, now seen corresponding path program 2 times [2020-10-12 15:56:02,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:56:02,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967022537] [2020-10-12 15:56:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:56:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:02,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:05,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:07,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:56:07,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:08,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:56:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:08,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:08,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:56:08,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:08,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:56:08,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:08,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:56:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:08,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:08,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:56:08,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:56:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:08,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 15:56:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:09,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:56:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:56:09,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:09,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 15:56:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:09,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:56:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:09,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:56:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:09,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:09,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:56:09,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:09,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:56:09,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:10,355 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-12 15:56:10,641 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 15:56:11,224 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-12 15:56:11,494 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-12 15:56:11,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 15:56:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:56:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:56:11,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:56:11,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 15:56:11,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:56:11,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 15:56:11,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:56:11,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:56:11,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:56:11,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:56:11,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:56:12,016 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-12 15:56:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:56:12,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967022537] [2020-10-12 15:56:12,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:56:12,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:56:12,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996186865] [2020-10-12 15:56:12,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:56:12,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:56:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:56:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:56:12,046 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 31 states. [2020-10-12 15:56:13,059 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47