/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:03:52,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:03:52,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:03:52,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:03:52,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:03:52,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:03:52,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:03:52,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:03:52,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:03:52,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:03:52,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:03:52,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:03:52,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:03:52,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:03:52,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:03:52,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:03:52,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:03:52,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:03:52,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:03:52,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:03:52,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:03:52,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:03:52,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:03:52,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:03:52,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:03:52,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:03:52,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:03:52,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:03:52,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:03:52,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:03:52,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:03:52,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:03:52,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:03:52,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:03:52,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:03:52,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:03:52,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:03:52,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:03:52,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:03:52,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:03:52,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:03:52,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:03:52,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:03:52,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:03:52,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:03:52,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:03:52,725 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:03:52,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:03:52,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:03:52,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:03:52,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:03:52,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:03:52,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:03:52,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:03:52,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:03:52,729 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:03:52,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:03:52,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:03:52,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:03:52,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:03:52,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:03:52,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:03:52,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:03:52,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:03:52,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:03:52,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:03:52,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:03:52,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:03:52,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:03:52,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:03:52,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:03:52,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:03:53,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:03:53,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:03:53,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:03:53,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:03:53,210 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:03:53,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2020-10-27 20:03:53,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9171e0e54/028f5d178b7047fe988c0cb39df290b4/FLAG0a45f215d [2020-10-27 20:03:54,150 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:03:54,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2020-10-27 20:03:54,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9171e0e54/028f5d178b7047fe988c0cb39df290b4/FLAG0a45f215d [2020-10-27 20:03:54,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9171e0e54/028f5d178b7047fe988c0cb39df290b4 [2020-10-27 20:03:54,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:03:54,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:03:54,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:03:54,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:03:54,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:03:54,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:03:54" (1/1) ... [2020-10-27 20:03:54,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a617057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:54, skipping insertion in model container [2020-10-27 20:03:54,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:03:54" (1/1) ... [2020-10-27 20:03:54,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:03:54,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:03:55,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:03:55,054 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:03:55,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:03:55,178 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:03:55,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55 WrapperNode [2020-10-27 20:03:55,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:03:55,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:03:55,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:03:55,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:03:55,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... [2020-10-27 20:03:55,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:03:55,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:03:55,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:03:55,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:03:55,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:03:55,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:03:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:03:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:03:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:03:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:03:55,362 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:03:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 20:03:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-27 20:03:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-27 20:03:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2020-10-27 20:03:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:03:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:03:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:03:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:03:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:03:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:03:55,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:03:55,366 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:03:55,366 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:03:55,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:03:55,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:03:55,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:03:55,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:03:55,368 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:03:55,368 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:03:55,368 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:03:55,368 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:03:55,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:03:55,369 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:03:55,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:03:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:03:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:03:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:03:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:03:55,371 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:03:55,372 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:03:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:03:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:03:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:03:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:03:55,373 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:03:55,374 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:03:55,375 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:03:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:03:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:03:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:03:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:03:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:03:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:03:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:03:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:03:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:03:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:03:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-27 20:03:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:03:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:03:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:03:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:03:55,862 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:03:56,093 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:03:56,094 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 20:03:56,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:03:56 BoogieIcfgContainer [2020-10-27 20:03:56,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:03:56,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:03:56,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:03:56,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:03:56,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:03:54" (1/3) ... [2020-10-27 20:03:56,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1732835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:03:56, skipping insertion in model container [2020-10-27 20:03:56,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:03:55" (2/3) ... [2020-10-27 20:03:56,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1732835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:03:56, skipping insertion in model container [2020-10-27 20:03:56,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:03:56" (3/3) ... [2020-10-27 20:03:56,107 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2020-10-27 20:03:56,122 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:03:56,128 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:03:56,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:03:56,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:03:56,176 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:03:56,176 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:03:56,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:03:56,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:03:56,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:03:56,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:03:56,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:03:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-27 20:03:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:03:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:56,207 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] [2020-10-27 20:03:56,207 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:56,214 INFO L82 PathProgramCache]: Analyzing trace with hash -725526549, now seen corresponding path program 1 times [2020-10-27 20:03:56,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:56,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226571533] [2020-10-27 20:03:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:56,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:56,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:56,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:03:56,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-27 20:03:56,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:56,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 20:03:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:03:56,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:56,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:56,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:56,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:56,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 20:03:56,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:56,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:56,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:03:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:57,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:57,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:03:57,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:03:57,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:03:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:57,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:57,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:03:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:57,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:57,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:03:57,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:57,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 20:03:57,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:57,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:57,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:03:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:57,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:57,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:03:57,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:03:57,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:57,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226571533] [2020-10-27 20:03:57,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:03:57,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:03:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255759100] [2020-10-27 20:03:57,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:03:57,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:03:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:03:57,123 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-10-27 20:03:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:03:57,367 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2020-10-27 20:03:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:03:57,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:03:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:03:57,380 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:03:57,381 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:03:57,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:03:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:03:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-27 20:03:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:03:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-27 20:03:57,438 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 31 [2020-10-27 20:03:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:03:57,439 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-27 20:03:57,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:03:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-27 20:03:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:03:57,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:03:57,442 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] [2020-10-27 20:03:57,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:03:57,443 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:03:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:03:57,444 INFO L82 PathProgramCache]: Analyzing trace with hash 264092693, now seen corresponding path program 1 times [2020-10-27 20:03:57,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:03:57,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235169074] [2020-10-27 20:03:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:03:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:57,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:59,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:03:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:03:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-27 20:03:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:03:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:03:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:03:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:59,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:03:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:59,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:59,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:03:59,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:03:59,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:59,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:03:59,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:03:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:59,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:03:59,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:03:59,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:03:59,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:03:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:03:59,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:59,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:03:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:59,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:03:59,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:59,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-27 20:03:59,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:03:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:03:59,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:03:59,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:03:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:03:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:03:59,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:03:59,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:03:59,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:03:59,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 20:03:59,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:03:59,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:03:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:03:59,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:03:59,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:03:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:03:59,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235169074] [2020-10-27 20:03:59,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:03:59,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 20:03:59,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678590080] [2020-10-27 20:03:59,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:03:59,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:03:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:03:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:03:59,936 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 12 states. [2020-10-27 20:04:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:00,424 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-27 20:04:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:04:00,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 20:04:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:00,427 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:04:00,427 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:04:00,428 INFO L677 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 [2020-10-27 20:04:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:04:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-27 20:04:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:04:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 20:04:00,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 31 [2020-10-27 20:04:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:00,442 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 20:04:00,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:04:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 20:04:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:04:00,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:00,443 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] [2020-10-27 20:04:00,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:04:00,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash 265701407, now seen corresponding path program 1 times [2020-10-27 20:04:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:00,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252492862] [2020-10-27 20:04:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:00,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:04:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:04:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:01,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:01,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:01,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:01,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:01,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:01,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:01,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:01,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:01,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:01,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:01,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:04:01,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:01,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:04:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:01,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:01,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:01,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:04:01,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:04:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:01,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:04:01,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:01,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:01,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:01,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:01,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:04:01,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:01,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252492862] [2020-10-27 20:04:01,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:01,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:04:01,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797384754] [2020-10-27 20:04:01,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:04:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:04:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:04:01,713 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 7 states. [2020-10-27 20:04:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:01,964 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-27 20:04:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:04:01,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-27 20:04:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:01,966 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:04:01,966 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:04:01,967 INFO L677 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 [2020-10-27 20:04:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:04:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-27 20:04:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:04:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-27 20:04:01,976 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-10-27 20:04:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:01,977 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-27 20:04:01,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:04:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-27 20:04:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:04:01,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:01,978 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] [2020-10-27 20:04:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:04:01,979 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2032441523, now seen corresponding path program 1 times [2020-10-27 20:04:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99057905] [2020-10-27 20:04:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:02,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:02,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:04:07,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:04:07,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:04:07,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:04:07,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:07,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:07,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:07,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:07,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:07,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:04:07,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:07,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 20:04:07,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:07,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:07,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:07,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:07,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:07,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:04:07,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:07,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:07,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:04:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:04:07,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:07,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:04:07,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:04:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:07,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:07,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:07,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:07,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:04:07,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:07,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:04:07,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99057905] [2020-10-27 20:04:07,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:07,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:04:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241052155] [2020-10-27 20:04:07,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:04:07,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:04:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:04:07,231 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 5 states. [2020-10-27 20:04:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:07,424 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-27 20:04:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:04:07,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-27 20:04:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:07,428 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:04:07,428 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:04:07,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:04:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:04:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:04:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:04:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 20:04:07,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 41 [2020-10-27 20:04:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:07,449 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 20:04:07,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:04:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 20:04:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:04:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:07,453 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] [2020-10-27 20:04:07,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:04:07,471 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2121977163, now seen corresponding path program 1 times [2020-10-27 20:04:07,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:07,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550327314] [2020-10-27 20:04:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:07,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:12,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:12,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:04:12,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:04:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:04:12,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:04:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:12,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:04:12,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:12,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:12,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:12,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:12,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:12,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:12,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:12,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:12,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:12,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:04:12,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:12,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:13,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:13,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:13,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:13,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:13,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:04:13,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:13,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:13,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:04:13,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:13,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:04:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:13,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 20:04:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 20:04:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:04:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:04:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:13,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:13,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:13,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:13,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 20:04:13,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:04:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550327314] [2020-10-27 20:04:13,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:13,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:04:13,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673589568] [2020-10-27 20:04:13,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:04:13,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:04:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:04:13,657 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 19 states. [2020-10-27 20:04:14,947 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 20:04:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:15,241 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-27 20:04:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:04:15,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-27 20:04:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:15,243 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:04:15,243 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:04:15,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:04:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:04:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:04:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:04:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-27 20:04:15,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 41 [2020-10-27 20:04:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:15,254 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-27 20:04:15,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:04:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-27 20:04:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:04:15,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:15,256 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, 1, 1] [2020-10-27 20:04:15,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:04:15,257 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -367459373, now seen corresponding path program 1 times [2020-10-27 20:04:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:15,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793888252] [2020-10-27 20:04:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:15,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:15,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:15,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:17,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:18,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:20,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:04:20,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:04:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:04:20,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:04:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 20:04:20,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:04:20,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:20,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:20,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:20,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:20,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:20,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:20,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:20,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:20,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:04:20,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:20,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:04:20,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:20,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:20,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:20,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:20,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:20,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:20,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:20,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:04:20,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:20,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:20,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:04:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:20,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,409 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 27 [2020-10-27 20:04:21,711 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 40 [2020-10-27 20:04:21,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:21,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:21,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 20:04:21,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:21,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:04:21,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793888252] [2020-10-27 20:04:21,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:21,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 20:04:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497770012] [2020-10-27 20:04:21,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:04:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:04:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:04:21,923 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 13 states. [2020-10-27 20:04:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:22,585 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-27 20:04:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:04:22,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-27 20:04:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:22,588 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:04:22,588 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:04:22,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:04:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:04:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-27 20:04:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:04:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-27 20:04:22,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 44 [2020-10-27 20:04:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:22,610 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-27 20:04:22,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:04:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-27 20:04:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 20:04:22,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:22,617 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, 1, 1] [2020-10-27 20:04:22,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:04:22,618 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -365850659, now seen corresponding path program 1 times [2020-10-27 20:04:22,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:22,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932670101] [2020-10-27 20:04:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:22,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:23,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:23,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:04:23,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:23,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-27 20:04:23,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:04:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:23,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:23,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:23,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:23,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:23,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:23,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:23,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:23,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:23,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:23,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:23,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:24,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:24,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:24,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:24,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:24,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:24,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:04:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:24,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:24,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:24,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:04:24,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:24,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:24,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:24,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:24,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:24,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:24,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:24,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:24,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:04:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932670101] [2020-10-27 20:04:24,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:24,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:04:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407832074] [2020-10-27 20:04:24,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:04:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:04:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:04:24,112 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 8 states. [2020-10-27 20:04:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:24,382 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-27 20:04:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:04:24,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-27 20:04:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:24,384 INFO L225 Difference]: With dead ends: 91 [2020-10-27 20:04:24,384 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:04:24,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:04:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:04:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-27 20:04:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 20:04:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-27 20:04:24,395 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 44 [2020-10-27 20:04:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:24,395 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-27 20:04:24,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:04:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-27 20:04:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:04:24,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:24,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:24,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:04:24,397 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1407253065, now seen corresponding path program 1 times [2020-10-27 20:04:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:24,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969294524] [2020-10-27 20:04:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:24,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:25,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:28,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4416 [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:04:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:04:28,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:29,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:29,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:29,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:29,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:29,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:04:29,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:29,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:04:29,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:29,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:29,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:29,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:29,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:29,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:04:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:29,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:04:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:29,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:04:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:29,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:04:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:30,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:30,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:30,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:30,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:30,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 20:04:30,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:30,663 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 20:04:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:04:30,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969294524] [2020-10-27 20:04:30,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:30,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:04:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989828407] [2020-10-27 20:04:30,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:04:30,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:04:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:04:30,695 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 21 states. [2020-10-27 20:04:32,264 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 20:04:32,579 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-27 20:04:32,914 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-27 20:04:33,266 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-27 20:04:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:33,491 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-27 20:04:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:04:33,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-27 20:04:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:33,498 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:04:33,498 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:04:33,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:04:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:04:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:04:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:04:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-27 20:04:33,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 54 [2020-10-27 20:04:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:33,524 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-27 20:04:33,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:04:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-27 20:04:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:04:33,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:33,525 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] [2020-10-27 20:04:33,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:04:33,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1582114330, now seen corresponding path program 1 times [2020-10-27 20:04:33,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:33,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129223059] [2020-10-27 20:04:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5267 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 20:04:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:04:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:38,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:38,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:38,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:38,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:38,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:38,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:38,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:38,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:38,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:38,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:04:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:38,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:04:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:39,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:39,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:04:39,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:40,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:40,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:40,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:40,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-27 20:04:40,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129223059] [2020-10-27 20:04:40,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:40,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:04:40,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998715779] [2020-10-27 20:04:40,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:04:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:04:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:04:40,244 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 14 states. [2020-10-27 20:04:40,964 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 20:04:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:41,302 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-27 20:04:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:04:41,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 20:04:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:41,304 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:04:41,305 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:04:41,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:04:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:04:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 20:04:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:04:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-27 20:04:41,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 56 [2020-10-27 20:04:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:41,316 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-27 20:04:41,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:04:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-27 20:04:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 20:04:41,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:41,317 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] [2020-10-27 20:04:41,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:04:41,317 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1583723044, now seen corresponding path program 1 times [2020-10-27 20:04:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:41,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556931298] [2020-10-27 20:04:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:43,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:43,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 20:04:43,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2253 [2020-10-27 20:04:43,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:43,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:04:43,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:43,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:04:43,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:44,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:04:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:04:44,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:44,851 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-27 20:04:45,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:04:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:45,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:45,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:04:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:45,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:45,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:45,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:45,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:45,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:04:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:45,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:04:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,584 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 20:04:47,103 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-27 20:04:47,554 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 20:04:48,179 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2020-10-27 20:04:48,927 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-27 20:04:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:49,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:49,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:49,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:49,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:49,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 20:04:49,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:49,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:04:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:49,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:50,254 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 51 [2020-10-27 20:04:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:04:50,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556931298] [2020-10-27 20:04:50,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:50,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:04:50,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76429361] [2020-10-27 20:04:50,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:04:50,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:04:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:04:50,299 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 31 states. [2020-10-27 20:04:50,983 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 20:04:51,722 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 20:04:52,121 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 20:04:52,945 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 20:04:53,323 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-27 20:04:54,446 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-10-27 20:04:55,386 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 104 [2020-10-27 20:04:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:56,428 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-27 20:04:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:04:56,429 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2020-10-27 20:04:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:56,431 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:04:56,431 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:04:56,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=187, Invalid=2069, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:04:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:04:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-27 20:04:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:04:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-27 20:04:56,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 56 [2020-10-27 20:04:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:56,447 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-27 20:04:56,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:04:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-27 20:04:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:04:56,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:56,449 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, 1, 1] [2020-10-27 20:04:56,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:04:56,449 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1543958549, now seen corresponding path program 1 times [2020-10-27 20:04:56,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:56,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721258050] [2020-10-27 20:04:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:56,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:59,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:00,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:05:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 20:05:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:05:01,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:01,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:01,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:05:01,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:05:01,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:05:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:01,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:05:01,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:01,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:05:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:01,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:05:01,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:01,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:01,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:01,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:05:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:05:01,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 20:05:01,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:05:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:01,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:05:01,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:02,670 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2020-10-27 20:05:03,211 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 35 [2020-10-27 20:05:05,195 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 272 DAG size of output: 44 [2020-10-27 20:05:08,405 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 316 DAG size of output: 52 [2020-10-27 20:05:14,207 WARN L193 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 515 DAG size of output: 45 [2020-10-27 20:05:19,839 WARN L193 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 515 DAG size of output: 46 [2020-10-27 20:05:25,539 WARN L193 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 505 DAG size of output: 39 [2020-10-27 20:05:25,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:25,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:05:25,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:05:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:05:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:05:25,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721258050] [2020-10-27 20:05:25,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:25,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:05:25,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366767577] [2020-10-27 20:05:25,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:05:25,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:25,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:05:25,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:05:25,693 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 17 states. [2020-10-27 20:05:26,485 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2020-10-27 20:05:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:27,633 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-10-27 20:05:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:05:27,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-27 20:05:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:27,634 INFO L225 Difference]: With dead ends: 69 [2020-10-27 20:05:27,635 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:05:27,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:05:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:05:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-27 20:05:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:05:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-27 20:05:27,659 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 58 [2020-10-27 20:05:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:27,659 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-27 20:05:27,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:05:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-27 20:05:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:05:27,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:27,660 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, 1, 1] [2020-10-27 20:05:27,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:05:27,660 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1545567263, now seen corresponding path program 1 times [2020-10-27 20:05:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:27,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367140999] [2020-10-27 20:05:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:31,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3782 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:05:31,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:31,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:31,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:31,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:31,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:31,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:31,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:05:31,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:31,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:32,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:05:32,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:05:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:05:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:32,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:05:32,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:32,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:05:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:32,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:32,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:32,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:32,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:32,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 20:05:32,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:33,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:05:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:05:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:34,143 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 20:05:34,739 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-27 20:05:35,305 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-27 20:05:35,897 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-27 20:05:36,303 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 20:05:36,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:05:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:37,016 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-27 20:05:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:05:37,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367140999] [2020-10-27 20:05:37,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:37,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:05:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96247196] [2020-10-27 20:05:37,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:05:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:05:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:05:37,057 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 32 states. [2020-10-27 20:05:37,770 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-27 20:05:38,706 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-27 20:05:39,174 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-27 20:05:39,958 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 20:05:40,470 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:05:41,346 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 20:05:41,736 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 20:05:42,480 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2020-10-27 20:05:43,398 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 100 [2020-10-27 20:05:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:44,949 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-27 20:05:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:05:44,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2020-10-27 20:05:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:44,952 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:05:44,953 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:05:44,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=205, Invalid=2447, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:05:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:05:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-27 20:05:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:05:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-27 20:05:44,981 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 58 [2020-10-27 20:05:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:44,983 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-27 20:05:44,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:05:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-27 20:05:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:05:44,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:44,985 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, 1, 1] [2020-10-27 20:05:44,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:05:44,985 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash -627318977, now seen corresponding path program 2 times [2020-10-27 20:05:44,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:44,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415241907] [2020-10-27 20:05:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:45,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:05:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:05:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4802 [2020-10-27 20:05:49,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:05:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:05:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:49,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:49,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:49,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:49,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:49,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:05:49,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:49,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:49,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:49,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:05:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:05:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:51,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:05:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:51,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:05:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:51,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:51,442 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 20:05:51,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:05:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:05:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:52,090 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-27 20:05:52,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:52,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:52,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:52,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 20:05:52,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:05:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:52,822 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-10-27 20:05:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:05:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415241907] [2020-10-27 20:05:52,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:52,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:05:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207209900] [2020-10-27 20:05:52,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:05:52,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:05:52,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:05:52,854 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 28 states. [2020-10-27 20:05:53,737 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 20:05:55,240 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-27 20:05:55,812 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 20:05:56,142 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-27 20:05:56,519 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-27 20:05:56,847 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-27 20:05:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:57,357 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-27 20:05:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:05:57,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-27 20:05:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:57,360 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:05:57,360 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:05:57,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:05:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:05:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-27 20:05:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:05:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-27 20:05:57,373 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 58 [2020-10-27 20:05:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:57,373 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-27 20:05:57,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:05:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-27 20:05:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:05:57,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:57,375 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, 1, 1] [2020-10-27 20:05:57,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:05:57,375 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:57,376 INFO L82 PathProgramCache]: Analyzing trace with hash -764008624, now seen corresponding path program 2 times [2020-10-27 20:05:57,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:57,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447517230] [2020-10-27 20:05:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:57,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:00,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:06:02,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:06:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:06:02,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:06:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 20:06:02,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:06:02,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:02,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:02,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:02,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:02,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:02,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:02,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:06:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:02,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:06:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:02,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:02,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:06:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:02,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:02,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:06:02,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:02,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 20:06:02,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:06:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:06:02,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:03,337 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-27 20:06:03,805 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-10-27 20:06:04,632 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 42 [2020-10-27 20:06:07,991 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 627 DAG size of output: 55 [2020-10-27 20:06:11,323 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 630 DAG size of output: 76 [2020-10-27 20:06:14,298 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 608 DAG size of output: 49 [2020-10-27 20:06:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:06:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:14,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:14,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:14,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:06:14,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 20:06:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447517230] [2020-10-27 20:06:14,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:14,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:06:14,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471758767] [2020-10-27 20:06:14,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:06:14,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:06:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:06:14,517 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 18 states. [2020-10-27 20:06:15,712 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 20:06:16,086 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 20:06:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:16,463 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-27 20:06:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:06:16,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-27 20:06:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:16,466 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:06:16,466 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 20:06:16,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:06:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 20:06:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-10-27 20:06:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:06:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-27 20:06:16,478 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 60 [2020-10-27 20:06:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:16,478 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-27 20:06:16,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:06:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-27 20:06:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:06:16,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:16,479 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, 1, 1, 1, 1] [2020-10-27 20:06:16,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:06:16,480 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash -762399910, now seen corresponding path program 2 times [2020-10-27 20:06:16,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:16,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219231246] [2020-10-27 20:06:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:16,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:17,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:21,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:06:21,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:22,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:22,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:22,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:22,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:22,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:22,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:06:22,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:22,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:22,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:22,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:06:22,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:06:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:22,791 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-27 20:06:23,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:06:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:23,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:23,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:23,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:06:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:23,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:06:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:23,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:23,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:23,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:23,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:23,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:06:23,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:23,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:06:23,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:23,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:06:23,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:23,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:06:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:06:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:23,928 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 20:06:24,261 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 20:06:24,567 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-27 20:06:25,308 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2020-10-27 20:06:25,530 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 20:06:25,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:06:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:25,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:06:25,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:06:25,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:06:25,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:26,013 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 20:06:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:06:26,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219231246] [2020-10-27 20:06:26,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:26,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:06:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95380774] [2020-10-27 20:06:26,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:06:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:06:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=925, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:06:26,050 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 32 states. [2020-10-27 20:06:26,810 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 20:06:27,795 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-27 20:06:28,751 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2020-10-27 20:06:29,758 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 113 [2020-10-27 20:06:30,490 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 20:06:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:31,678 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-10-27 20:06:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:06:31,679 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 60 [2020-10-27 20:06:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:31,680 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:06:31,680 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:06:31,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:06:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:06:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-27 20:06:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:06:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-10-27 20:06:31,695 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 60 [2020-10-27 20:06:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:31,695 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-10-27 20:06:31,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:06:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-10-27 20:06:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:06:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:31,698 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2020-10-27 20:06:31,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:06:31,698 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1777630155, now seen corresponding path program 3 times [2020-10-27 20:06:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237780354] [2020-10-27 20:06:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:31,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:32,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:32,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:06:32,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:06:32,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-27 20:06:32,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:06:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:06:32,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:06:32,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:32,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:32,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:32,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:32,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:06:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:32,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:32,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:32,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:32,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:06:32,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:32,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 20:06:32,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:06:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:32,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:06:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:06:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:33,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:06:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:06:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:06:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:33,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:06:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:06:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:33,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:06:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:33,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:06:33,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:33,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 20:06:33,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:33,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:06:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:06:33,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:06:33,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:06:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:33,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:33,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:33,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:33,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:33,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 20:06:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237780354] [2020-10-27 20:06:33,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:33,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:06:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123967491] [2020-10-27 20:06:33,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:06:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:06:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:06:33,266 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 14 states. [2020-10-27 20:06:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:34,056 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-27 20:06:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:06:34,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 20:06:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:34,059 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:06:34,059 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 20:06:34,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:06:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 20:06:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-27 20:06:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 20:06:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-10-27 20:06:34,075 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 62 [2020-10-27 20:06:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:34,075 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-10-27 20:06:34,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:06:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-10-27 20:06:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:06:34,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:34,077 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2020-10-27 20:06:34,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:06:34,077 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1779238869, now seen corresponding path program 3 times [2020-10-27 20:06:34,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:34,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40231782] [2020-10-27 20:06:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:35,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:38,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:39,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:06:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:40,113 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 43 [2020-10-27 20:06:40,560 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-10-27 20:06:40,977 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-27 20:06:41,263 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 20:06:41,429 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-10-27 20:06:41,608 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-10-27 20:06:41,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:06:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:41,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:41,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:06:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:41,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:06:41,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:41,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:06:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:41,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:06:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:41,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:41,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:41,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:06:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:41,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:41,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:06:41,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:06:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:06:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:41,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:06:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:41,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:42,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:06:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:06:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:43,639 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 43 [2020-10-27 20:06:45,708 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 268 DAG size of output: 57 [2020-10-27 20:06:51,328 WARN L193 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 599 DAG size of output: 58 [2020-10-27 20:06:51,560 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2020-10-27 20:06:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:06:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:06:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:06:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:06:51,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40231782] [2020-10-27 20:06:51,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:06:51,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:06:51,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293337129] [2020-10-27 20:06:51,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:06:51,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:06:51,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:06:51,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:06:51,672 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 19 states. [2020-10-27 20:06:52,662 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-27 20:06:53,095 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 20:06:53,436 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 20:06:53,737 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-27 20:06:54,162 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-27 20:06:54,335 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-27 20:06:54,497 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:06:54,801 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-27 20:06:55,297 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-10-27 20:06:55,660 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 20:06:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:06:55,662 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-10-27 20:06:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:06:55,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-27 20:06:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:06:55,665 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:06:55,665 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:06:55,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:06:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:06:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-10-27 20:06:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:06:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-10-27 20:06:55,684 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 62 [2020-10-27 20:06:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:06:55,684 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-10-27 20:06:55,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:06:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-10-27 20:06:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 20:06:55,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:06:55,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 20:06:55,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:06:55,686 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:06:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:06:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash -392520533, now seen corresponding path program 3 times [2020-10-27 20:06:55,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:06:55,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866294411] [2020-10-27 20:06:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:06:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:06:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:06:56,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4996 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:07:00,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:07:00,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:00,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:00,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:00,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:00,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:07:00,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:07:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:07:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:07:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:00,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:00,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:00,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:07:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:00,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:00,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:00,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:00,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:00,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:07:00,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:07:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:00,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:00,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:07:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:01,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:01,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:01,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:07:01,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:07:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 20:07:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:01,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:07:01,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:01,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:01,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:07:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:01,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:01,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:01,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:01,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:07:01,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:01,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:07:01,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866294411] [2020-10-27 20:07:01,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:07:01,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:07:01,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600073703] [2020-10-27 20:07:01,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:07:01,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:07:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:07:01,068 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 9 states. [2020-10-27 20:07:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:01,440 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2020-10-27 20:07:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:07:01,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-27 20:07:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:01,444 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:07:01,444 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 20:07:01,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:07:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 20:07:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 20:07:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:07:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-27 20:07:01,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 68 [2020-10-27 20:07:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:01,457 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-27 20:07:01,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:07:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-27 20:07:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:07:01,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:01,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-27 20:07:01,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:07:01,459 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:01,459 INFO L82 PathProgramCache]: Analyzing trace with hash 456105350, now seen corresponding path program 4 times [2020-10-27 20:07:01,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:01,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003214285] [2020-10-27 20:07:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:06,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:07:06,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:06,736 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-10-27 20:07:06,867 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-27 20:07:07,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:07:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:07,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:07,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:07,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:07,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:07:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:07,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:07:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:07,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:07,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:07,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:07,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:07,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 20:07:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:07,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:07,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:07,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:07:07,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:07:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:07:07,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:07,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 20:07:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:07,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:07,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:07,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:07:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:08,952 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2020-10-27 20:07:11,002 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 300 DAG size of output: 53 [2020-10-27 20:07:17,698 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 828 DAG size of output: 53 [2020-10-27 20:07:25,245 WARN L193 SmtUtils]: Spent 7.05 s on a formula simplification. DAG size of input: 828 DAG size of output: 53 [2020-10-27 20:07:31,600 WARN L193 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 779 DAG size of output: 47 [2020-10-27 20:07:31,989 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 33 [2020-10-27 20:07:31,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:07:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:32,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:07:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:07:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 20:07:32,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003214285] [2020-10-27 20:07:32,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:07:32,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:07:32,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034380522] [2020-10-27 20:07:32,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:07:32,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:07:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:07:32,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:07:32,119 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-10-27 20:07:33,374 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-27 20:07:33,882 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 20:07:35,180 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:07:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:07:35,452 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-27 20:07:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:07:35,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-27 20:07:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:07:35,454 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:07:35,454 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:07:35,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:07:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:07:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 20:07:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 20:07:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-27 20:07:35,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 64 [2020-10-27 20:07:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:07:35,471 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-27 20:07:35,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:07:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-27 20:07:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 20:07:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:35,474 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-27 20:07:35,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:07:35,474 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 457714064, now seen corresponding path program 4 times [2020-10-27 20:07:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682065888] [2020-10-27 20:07:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:35,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:07:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking...