/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/dll2c_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:19:47,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:19:47,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:19:47,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:19:47,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:19:47,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:19:47,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:19:47,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:19:47,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:19:47,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:19:47,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:19:47,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:19:47,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:19:47,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:19:47,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:19:47,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:19:47,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:19:47,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:19:47,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:19:47,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:19:47,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:19:47,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:19:47,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:19:47,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:19:47,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:19:47,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:19:47,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:19:47,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:19:47,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:19:47,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:19:47,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:19:47,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:19:47,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:19:47,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:19:47,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:19:47,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:19:47,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:19:47,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:19:47,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:19:47,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:19:47,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:19:47,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:19:47,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:19:47,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:19:47,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:19:47,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:19:47,551 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:19:47,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:19:47,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:19:47,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:19:47,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:19:47,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:19:47,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:19:47,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:19:47,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:19:47,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:19:47,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:19:47,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:19:47,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:19:47,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:19:47,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:19:47,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:19:47,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:19:47,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:47,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:19:47,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:19:47,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:19:47,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:19:47,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:19:47,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:19:47,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:19:47,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:19:48,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:19:48,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:19:48,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:19:48,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:19:48,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:19:48,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_append_equal.i [2020-10-27 01:19:48,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b89882e5e/a2cac69fa7d648fbbe509266a4f35b01/FLAGd77503ed2 [2020-10-27 01:19:49,044 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:19:49,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2c_append_equal.i [2020-10-27 01:19:49,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b89882e5e/a2cac69fa7d648fbbe509266a4f35b01/FLAGd77503ed2 [2020-10-27 01:19:49,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b89882e5e/a2cac69fa7d648fbbe509266a4f35b01 [2020-10-27 01:19:49,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:19:49,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:19:49,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:49,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:19:49,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:19:49,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:49,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a8c0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49, skipping insertion in model container [2020-10-27 01:19:49,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:49,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:19:49,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:19:49,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:49,757 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:19:49,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:49,944 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:19:49,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49 WrapperNode [2020-10-27 01:19:49,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:49,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:19:49,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:19:49,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:19:49,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:49,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... [2020-10-27 01:19:50,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:19:50,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:19:50,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:19:50,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:19:50,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:50,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:19:50,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:19:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:19:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:19:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:19:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:19:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 01:19:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2020-10-27 01:19:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2020-10-27 01:19:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_append [2020-10-27 01:19:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:19:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:19:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:19:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:19:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:19:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:19:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:19:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:19:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:19:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:19:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:19:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:19:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:19:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:19:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:19:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:19:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:19:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:19:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:19:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:19:50,159 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:19:50,160 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:19:50,161 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2020-10-27 01:19:50,162 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_append [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:19:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:19:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:19:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:19:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:19:50,628 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:19:50,796 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:19:50,796 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:19:50,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:50 BoogieIcfgContainer [2020-10-27 01:19:50,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:19:50,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:19:50,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:19:50,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:19:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:19:49" (1/3) ... [2020-10-27 01:19:50,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7266390e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:50, skipping insertion in model container [2020-10-27 01:19:50,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:49" (2/3) ... [2020-10-27 01:19:50,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7266390e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:50, skipping insertion in model container [2020-10-27 01:19:50,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:50" (3/3) ... [2020-10-27 01:19:50,809 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2020-10-27 01:19:50,822 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:19:50,828 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:19:50,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:19:50,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:19:50,875 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:19:50,875 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:19:50,875 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:19:50,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:19:50,875 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:19:50,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:19:50,876 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:19:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-27 01:19:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:19:50,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:50,906 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] [2020-10-27 01:19:50,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1169346361, now seen corresponding path program 1 times [2020-10-27 01:19:50,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:50,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670854855] [2020-10-27 01:19:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:51,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:19:56,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:19:56,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:19:56,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:19:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:19:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:19:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:56,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:19:56,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:56,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:19:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:19:56,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:56,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 01:19:56,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:19:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:19:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:56,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:56,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:19:56,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:56,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 01:19:56,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:56,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:56,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:56,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:19:56,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:56,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:19:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:57,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:57,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:19:57,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:57,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 01:19:57,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:19:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:19:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:57,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:19:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:57,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:57,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:57,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:19:57,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:57,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 01:19:57,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:57,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:19:57,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:19:57,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:19:57,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:19:57,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670854855] [2020-10-27 01:19:57,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:57,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:19:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421242119] [2020-10-27 01:19:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:19:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:19:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:19:57,523 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 18 states. [2020-10-27 01:19:58,499 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 01:19:58,915 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 01:19:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:59,498 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2020-10-27 01:19:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:19:59,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-27 01:19:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:59,511 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:19:59,511 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:19:59,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:19:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:19:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:19:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:19:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-27 01:19:59,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-27 01:19:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:59,571 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-27 01:19:59,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:19:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-27 01:19:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:19:59,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:59,574 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] [2020-10-27 01:19:59,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:19:59,575 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:59,575 INFO L82 PathProgramCache]: Analyzing trace with hash -502664150, now seen corresponding path program 1 times [2020-10-27 01:19:59,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:59,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034969596] [2020-10-27 01:19:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:59,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:20:02,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3153 [2020-10-27 01:20:02,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:20:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:20:02,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:02,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:02,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:02,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:02,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:02,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:20:02,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 01:20:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:20:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:20:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:20:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:20:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:02,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:20:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:02,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:02,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:02,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:20:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:20:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:03,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:03,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:03,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:03,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:20:03,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034969596] [2020-10-27 01:20:03,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:20:03,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:20:03,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704578520] [2020-10-27 01:20:03,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:20:03,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:20:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:20:03,027 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2020-10-27 01:20:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:03,343 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-27 01:20:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:20:03,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 01:20:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:03,346 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:20:03,346 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:20:03,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:20:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:20:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-27 01:20:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:20:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 01:20:03,374 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 38 [2020-10-27 01:20:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:03,374 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 01:20:03,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:20:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 01:20:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:03,377 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:20:03,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1972632988, now seen corresponding path program 1 times [2020-10-27 01:20:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078422349] [2020-10-27 01:20:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:08,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:20:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:08,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:08,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:08,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:08,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:20:08,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:20:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:09,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:09,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:09,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:20:09,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:20:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:20:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:20:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:09,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:09,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:09,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 01:20:09,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:09,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:20:09,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:09,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:20:09,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:09,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:09,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:09,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:09,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 01:20:09,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:20:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:09,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:20:09,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078422349] [2020-10-27 01:20:09,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:09,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:20:09,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994505021] [2020-10-27 01:20:09,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:20:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:09,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:20:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:20:09,716 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 19 states. [2020-10-27 01:20:10,744 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 01:20:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:11,089 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-27 01:20:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:20:11,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 01:20:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:11,094 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:20:11,094 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:20:11,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:20:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:20:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 01:20:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:20:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 01:20:11,105 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 48 [2020-10-27 01:20:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:11,105 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 01:20:11,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:20:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 01:20:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:20:11,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:11,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:11,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:20:11,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1642275938, now seen corresponding path program 1 times [2020-10-27 01:20:11,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:11,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359915199] [2020-10-27 01:20:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:11,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:15,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:20:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4222 [2020-10-27 01:20:15,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:20:15,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:15,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:20:15,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:15,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:15,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:15,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:15,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:15,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:16,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:20:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:16,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:16,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:16,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:16,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 01:20:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:20:16,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:16,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:20:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:20:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:17,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:20:17,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:20:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:20:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:17,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:20:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:17,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:17,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:17,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:17,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:20:17,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:20:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:17,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:20:17,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:20:18,199 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 01:20:18,604 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-27 01:20:18,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:18,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:18,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:18,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:18,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 01:20:18,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:18,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:20:18,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:18,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:18,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:19,803 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 50 [2020-10-27 01:20:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:20:19,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359915199] [2020-10-27 01:20:19,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:19,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:20:19,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026825468] [2020-10-27 01:20:19,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:20:19,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:19,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:20:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:20:19,838 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 28 states. [2020-10-27 01:20:20,599 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 01:20:20,949 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-27 01:20:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:22,368 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-27 01:20:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:20:22,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2020-10-27 01:20:22,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:22,370 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:20:22,370 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:20:22,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:20:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:20:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-27 01:20:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:20:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-27 01:20:22,388 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 48 [2020-10-27 01:20:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:22,389 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-27 01:20:22,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:20:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-27 01:20:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:20:22,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:22,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:22,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:20:22,391 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1147981399, now seen corresponding path program 1 times [2020-10-27 01:20:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:22,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388399358] [2020-10-27 01:20:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:27,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:27,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:20:27,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:27,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:20:27,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:20:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:20:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:27,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:27,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:27,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:20:27,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:27,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:27,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:27,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:27,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:28,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:28,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:20:28,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:28,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 01:20:28,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:28,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:20:28,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:28,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:28,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:20:28,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:20:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:20:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:20:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:28,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:28,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:28,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:28,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:28,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:20:28,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:20:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:20:28,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:28,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:20:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:29,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:29,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:20:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:29,694 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-27 01:20:30,079 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-27 01:20:30,351 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 01:20:30,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:30,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:20:30,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388399358] [2020-10-27 01:20:30,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:30,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:20:30,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587578566] [2020-10-27 01:20:30,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:20:30,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:20:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:20:30,647 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 28 states. [2020-10-27 01:20:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:32,693 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-27 01:20:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:20:32,693 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-27 01:20:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:32,695 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:20:32,695 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:20:32,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:20:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:20:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-27 01:20:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:20:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-27 01:20:32,710 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 51 [2020-10-27 01:20:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:32,711 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-27 01:20:32,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:20:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-27 01:20:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:20:32,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:32,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:32,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:20:32,713 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:32,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1189038412, now seen corresponding path program 1 times [2020-10-27 01:20:32,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:32,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900724206] [2020-10-27 01:20:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:32,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:37,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:37,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:20:37,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:37,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:20:37,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:20:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:37,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:20:37,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:38,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:38,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:38,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:38,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:38,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:38,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:20:38,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:38,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-27 01:20:38,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:20:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:38,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:20:38,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:39,084 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-27 01:20:39,361 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 01:20:39,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:39,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:20:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:39,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:20:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:40,023 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 01:20:40,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:20:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:40,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:40,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:40,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:40,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:40,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 454 [2020-10-27 01:20:40,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:20:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:20:40,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:41,074 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-27 01:20:42,006 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2020-10-27 01:20:42,257 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 01:20:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:42,939 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2020-10-27 01:20:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:20:42,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900724206] [2020-10-27 01:20:42,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:42,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:20:42,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9627708] [2020-10-27 01:20:42,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:20:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:42,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:20:42,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:20:42,970 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 29 states. [2020-10-27 01:20:43,923 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-27 01:20:45,082 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 01:20:45,469 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-27 01:20:45,692 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-27 01:20:46,187 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2020-10-27 01:20:46,722 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 105 [2020-10-27 01:20:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:20:48,311 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-10-27 01:20:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:20:48,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2020-10-27 01:20:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:20:48,313 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:20:48,313 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:20:48,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=168, Invalid=2088, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:20:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:20:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-27 01:20:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:20:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-27 01:20:48,327 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 52 [2020-10-27 01:20:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:20:48,328 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-27 01:20:48,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:20:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-27 01:20:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:20:48,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:20:48,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:20:48,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:20:48,330 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:20:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:20:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1063517678, now seen corresponding path program 2 times [2020-10-27 01:20:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:20:48,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629084069] [2020-10-27 01:20:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:20:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:48,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:20:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:20:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:20:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:53,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:20:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:53,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:53,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:20:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:53,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:20:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:54,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:54,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:20:54,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:54,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-27 01:20:54,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:20:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:54,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:20:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:55,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 01:20:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:20:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:20:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:55,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:20:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:55,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:55,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:20:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:20:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:55,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 01:20:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:55,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:20:55,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:20:55,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:20:55,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 01:20:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:55,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:56,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:56,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:20:56,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:20:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:56,703 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-27 01:20:57,348 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2020-10-27 01:20:57,560 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 01:20:57,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:20:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:20:57,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:20:57,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:20:57,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:20:57,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:20:57,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:20:58,058 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 01:20:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:20:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629084069] [2020-10-27 01:20:58,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:20:58,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:20:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816364659] [2020-10-27 01:20:58,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:20:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:20:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:20:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:20:58,084 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 33 states. [2020-10-27 01:20:59,698 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 01:21:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:00,674 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-27 01:21:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:21:00,675 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 58 [2020-10-27 01:21:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:00,677 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:21:00,677 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:21:00,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:21:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:21:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-27 01:21:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:21:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-27 01:21:00,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-10-27 01:21:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-27 01:21:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:21:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-27 01:21:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:21:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:00,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:21:00,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:21:00,716 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:00,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2126022957, now seen corresponding path program 1 times [2020-10-27 01:21:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:00,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147339224] [2020-10-27 01:21:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:00,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:03,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:03,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:21:03,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:03,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2949 [2020-10-27 01:21:03,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:21:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:21:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:04,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:04,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:04,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:21:04,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:04,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 01:21:04,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:21:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:21:04,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:04,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:04,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:04,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:05,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:05,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:21:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:05,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:21:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:05,981 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 01:21:06,295 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:21:06,523 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 01:21:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:21:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:21:06,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147339224] [2020-10-27 01:21:06,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:06,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:21:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112763449] [2020-10-27 01:21:06,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:21:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:21:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:21:06,861 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 29 states. [2020-10-27 01:21:07,470 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-27 01:21:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:09,792 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-27 01:21:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:21:09,793 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2020-10-27 01:21:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:09,794 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:21:09,794 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:21:09,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:21:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:21:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-27 01:21:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:21:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-27 01:21:09,806 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 55 [2020-10-27 01:21:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:09,807 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-27 01:21:09,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:21:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-27 01:21:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:21:09,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:09,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-27 01:21:09,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:21:09,809 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1443555638, now seen corresponding path program 2 times [2020-10-27 01:21:09,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:09,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775674591] [2020-10-27 01:21:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:10,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:21:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,072 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-27 01:21:15,187 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-27 01:21:15,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:21:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,974 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-27 01:21:16,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:16,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:16,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:16,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:21:16,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:16,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:16,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:16,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:16,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:16,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:16,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:16,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:21:16,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:21:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:16,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:21:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:16,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:21:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:17,323 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 01:21:17,667 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-27 01:21:18,126 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-10-27 01:21:18,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:18,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:18,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:21:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775674591] [2020-10-27 01:21:18,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:18,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:21:18,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20883461] [2020-10-27 01:21:18,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:21:18,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:21:18,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:21:18,469 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 31 states. [2020-10-27 01:21:19,800 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-27 01:21:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:21,651 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-27 01:21:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:21:21,652 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2020-10-27 01:21:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:21,654 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:21:21,655 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:21:21,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:21:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:21:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2020-10-27 01:21:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:21:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-27 01:21:21,668 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 56 [2020-10-27 01:21:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:21,668 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-27 01:21:21,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:21:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-27 01:21:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:21:21,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:21,670 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-27 01:21:21,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:21:21,670 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash 640616117, now seen corresponding path program 2 times [2020-10-27 01:21:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:21,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836197951] [2020-10-27 01:21:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:21,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:22,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:26,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:26,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:21:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:27,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:27,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:27,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:27,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:27,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:27,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:21:27,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:28,121 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-27 01:21:28,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:28,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:28,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:21:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:28,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:21:28,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 01:21:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:28,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:28,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:28,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:28,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:21:28,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:21:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:28,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 01:21:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:29,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,736 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2020-10-27 01:21:30,680 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-27 01:21:32,609 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 137 DAG size of output: 109 [2020-10-27 01:21:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:32,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:32,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:32,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:32,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 01:21:32,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:21:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:32,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:21:32,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836197951] [2020-10-27 01:21:32,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:32,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:21:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356505906] [2020-10-27 01:21:32,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:21:32,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:21:32,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:21:32,999 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 33 states. [2020-10-27 01:21:35,650 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-27 01:21:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:36,683 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-10-27 01:21:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:21:36,684 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-10-27 01:21:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:36,686 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:21:36,686 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:21:36,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:21:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:21:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2020-10-27 01:21:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:21:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-27 01:21:36,700 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 61 [2020-10-27 01:21:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:36,701 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-27 01:21:36,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:21:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-27 01:21:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:21:36,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:36,702 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 01:21:36,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:21:36,703 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:36,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1577090264, now seen corresponding path program 3 times [2020-10-27 01:21:36,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:36,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162163421] [2020-10-27 01:21:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:41,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:21:41,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:41,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:41,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:42,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:42,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:21:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:43,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:43,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:43,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:43,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:43,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:21:43,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:43,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:44,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:44,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:44,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:44,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 01:21:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:44,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:44,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:44,800 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 01:21:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 01:21:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:21:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:46,076 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-27 01:21:46,727 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2020-10-27 01:23:17,028 WARN L193 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 221 DAG size of output: 195 [2020-10-27 01:23:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:23:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:17,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:17,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:23:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:17,875 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-27 01:23:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:23:17,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162163421] [2020-10-27 01:23:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:23:17,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:23:17,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905813204] [2020-10-27 01:23:17,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:23:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:23:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:23:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1107, Unknown=2, NotChecked=0, Total=1190 [2020-10-27 01:23:17,921 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 35 states. [2020-10-27 01:23:22,187 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 01:23:23,680 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-27 01:23:27,652 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 201 [2020-10-27 01:23:32,035 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 01:23:35,795 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 01:23:36,165 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 01:23:37,143 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 01:23:38,255 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 01:23:40,366 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-27 01:23:40,727 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 01:23:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:23:44,244 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-27 01:23:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:23:44,246 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2020-10-27 01:23:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:23:44,248 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:23:44,248 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:23:44,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 108.8s TimeCoverageRelationStatistics Valid=222, Invalid=2856, Unknown=2, NotChecked=0, Total=3080 [2020-10-27 01:23:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:23:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-27 01:23:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:23:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-27 01:23:44,261 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 62 [2020-10-27 01:23:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:23:44,262 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-27 01:23:44,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:23:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-27 01:23:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:23:44,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:23:44,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:23:44,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:23:44,263 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:23:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:23:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 463542013, now seen corresponding path program 2 times [2020-10-27 01:23:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:23:44,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065056961] [2020-10-27 01:23:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:23:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:44,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:23:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:23:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:23:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:23:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:23:45,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:45,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:23:45,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:23:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:23:45,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:23:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:23:45,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:23:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-27 01:23:45,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:23:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:23:45,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:23:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:23:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:23:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:23:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:23:45,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:23:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:23:45,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:23:45,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:23:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:23:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:23:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:23:45,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:23:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:23:45,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065056961] [2020-10-27 01:23:45,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:23:45,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:23:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579619924] [2020-10-27 01:23:45,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:23:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:23:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:23:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:23:45,991 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 13 states. [2020-10-27 01:23:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:23:46,859 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-27 01:23:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:23:46,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 01:23:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:23:46,863 INFO L225 Difference]: With dead ends: 85 [2020-10-27 01:23:46,863 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:23:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:23:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:23:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-27 01:23:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:23:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-10-27 01:23:46,895 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 59 [2020-10-27 01:23:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:23:46,897 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-10-27 01:23:46,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:23:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-10-27 01:23:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:23:46,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:23:46,900 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:23:46,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:23:46,901 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:23:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:23:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1523547104, now seen corresponding path program 4 times [2020-10-27 01:23:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:23:46,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557723527] [2020-10-27 01:23:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:23:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:23:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking...