/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_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:21:06,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:21:06,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:21:06,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:21:06,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:21:06,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:21:06,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:21:06,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:21:06,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:21:06,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:21:06,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:21:06,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:21:06,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:21:06,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:21:06,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:21:06,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:21:06,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:21:06,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:21:06,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:21:06,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:21:06,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:21:06,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:21:06,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:21:06,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:21:06,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:21:06,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:21:06,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:21:06,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:21:06,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:21:06,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:21:06,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:21:06,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:21:06,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:21:06,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:21:06,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:21:06,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:21:06,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:21:06,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:21:06,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:21:06,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:21:06,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:21:06,508 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 01:21:06,561 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:21:06,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:21:06,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:21:06,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:21:06,567 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:21:06,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:21:06,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:21:06,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:21:06,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:21:06,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:21:06,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:21:06,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:21:06,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:21:06,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:21:06,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:21:06,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:21:06,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:21:06,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:21:06,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:21:06,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:21:06,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:21:06,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:21:06,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:21:06,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:21:06,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:21:06,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:21:06,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:21:06,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:21:06,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:21:06,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:21:07,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:21:07,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:21:07,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:21:07,070 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:21:07,070 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:21:07,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_prepend_equal.i [2020-10-27 01:21:07,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96dcbedbe/1df4ff88add54312a553855fae435ac6/FLAG8f31e5912 [2020-10-27 01:21:07,871 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:21:07,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2c_prepend_equal.i [2020-10-27 01:21:07,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96dcbedbe/1df4ff88add54312a553855fae435ac6/FLAG8f31e5912 [2020-10-27 01:21:08,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96dcbedbe/1df4ff88add54312a553855fae435ac6 [2020-10-27 01:21:08,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:21:08,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:21:08,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:21:08,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:21:08,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:21:08,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee1a2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08, skipping insertion in model container [2020-10-27 01:21:08,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:21:08,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:21:08,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:21:08,646 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:21:08,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:21:08,848 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:21:08,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08 WrapperNode [2020-10-27 01:21:08,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:21:08,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:21:08,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:21:08,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:21:08,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (1/1) ... [2020-10-27 01:21:08,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:21:08,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:21:08,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:21:08,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:21:08,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (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 01:21:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:21:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:21:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:21:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:21:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:21:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:21:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 01:21:09,079 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2020-10-27 01:21:09,079 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2020-10-27 01:21:09,079 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2020-10-27 01:21:09,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:21:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:21:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:21:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:21:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:21:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:21:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:21:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:21:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:21:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:21:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:21:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:21:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:21:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:21:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:21:09,085 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:21:09,086 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:21:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:21:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:21:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:21:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:21:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:21:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:21:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:21:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:21:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:21:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:21:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:21:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:21:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:21:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:21:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:21:09,090 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:21:09,091 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:21:09,092 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:21:09,092 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:21:09,092 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:21:09,092 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:21:09,092 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:21:09,093 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:21:09,094 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:21:09,095 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:21:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:21:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:21:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:21:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:21:09,096 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:21:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:21:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:21:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:21:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:21:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:21:09,098 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2020-10-27 01:21:09,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:21:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:21:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2020-10-27 01:21:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:21:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:21:09,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:21:09,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:21:09,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:21:09,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:21:09,677 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:21:09,867 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:21:09,867 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 01:21:09,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:21:09 BoogieIcfgContainer [2020-10-27 01:21:09,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:21:09,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:21:09,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:21:09,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:21:09,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:21:08" (1/3) ... [2020-10-27 01:21:09,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6571584c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:21:09, skipping insertion in model container [2020-10-27 01:21:09,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:21:08" (2/3) ... [2020-10-27 01:21:09,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6571584c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:21:09, skipping insertion in model container [2020-10-27 01:21:09,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:21:09" (3/3) ... [2020-10-27 01:21:09,880 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2020-10-27 01:21:09,893 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:21:09,899 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:21:09,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:21:09,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:21:09,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:21:09,944 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:21:09,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:21:09,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:21:09,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:21:09,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:21:09,945 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:21:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-27 01:21:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:21:09,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:09,974 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 01:21:09,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 639176777, now seen corresponding path program 1 times [2020-10-27 01:21:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:09,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948304324] [2020-10-27 01:21:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:21:15,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:21:15,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:21:15,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:21:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:15,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:21:15,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:21:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:15,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:15,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:21:15,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:21:15,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:15,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 01:21:15,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:21:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:15,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:21:15,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:15,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:15,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:15,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:15,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:21:15,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:15,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:15,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:15,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:15,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:15,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:21:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:16,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:16,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:16,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:16,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 01:21:16,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:21:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:16,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:16,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:16,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:16,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:16,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:16,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:16,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 01:21:16,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:21:16,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:16,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:16,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:21:16,356 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 01:21:16,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948304324] [2020-10-27 01:21:16,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:16,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:21:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125172994] [2020-10-27 01:21:16,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:21:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:21:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:21:16,389 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 18 states. [2020-10-27 01:21:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:17,970 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2020-10-27 01:21:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:21:17,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-27 01:21:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:17,984 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:21:17,984 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:21:17,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:21:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:21:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:21:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:21:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-27 01:21:18,045 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-27 01:21:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:18,046 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-27 01:21:18,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:21:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-27 01:21:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:21:18,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:18,049 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 01:21:18,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:21:18,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1305858988, now seen corresponding path program 1 times [2020-10-27 01:21:18,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:18,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436703255] [2020-10-27 01:21:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:21:23,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:21:23,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 01:21:23,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:23,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:21:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:23,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:23,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:21:23,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:23,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:23,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:21:23,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:21:23,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:23,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:23,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:21:23,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:21:23,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:23,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:21:23,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 01:21:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:23,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:23,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:21:23,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:21:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:23,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:23,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:23,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:23,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:23,299 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 01:21:23,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436703255] [2020-10-27 01:21:23,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:21:23,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:21:23,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386120280] [2020-10-27 01:21:23,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:21:23,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:21:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:21:23,303 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2020-10-27 01:21:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:23,614 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-27 01:21:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:21:23,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-27 01:21:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:23,616 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:21:23,616 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:21:23,617 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 01:21:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:21:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-27 01:21:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:21:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 01:21:23,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 38 [2020-10-27 01:21:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:23,627 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 01:21:23,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:21:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 01:21:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:21:23,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:23,649 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 01:21:23,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:21:23,650 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1119452514, now seen corresponding path program 1 times [2020-10-27 01:21:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300640747] [2020-10-27 01:21:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:24,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:28,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:28,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:21:28,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:21:28,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:21:28,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:21:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:21:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:21:28,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:28,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:28,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:28,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:28,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:21:28,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:28,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:28,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:28,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:29,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:21:29,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:29,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:29,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:21:29,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:29,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:29,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:29,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:29,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:21:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:29,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:29,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 01:21:29,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:21:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:29,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:29,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:29,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 01:21:29,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:21:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:29,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:29,588 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 01:21:29,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300640747] [2020-10-27 01:21:29,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:29,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:21:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397079952] [2020-10-27 01:21:29,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:21:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:21:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:21:29,594 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 19 states. [2020-10-27 01:21:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:31,049 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-27 01:21:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:21:31,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-27 01:21:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:31,052 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:21:31,052 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:21:31,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:21:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:21:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-27 01:21:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:21:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 01:21:31,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 48 [2020-10-27 01:21:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:31,077 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 01:21:31,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:21:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 01:21:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:21:31,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:31,079 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 01:21:31,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:21:31,080 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -439394144, now seen corresponding path program 1 times [2020-10-27 01:21:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:31,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514533176] [2020-10-27 01:21:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:21:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:21:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:34,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:34,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:21:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:34,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:21:34,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:34,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:34,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:21:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:34,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:35,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:35,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:35,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:21:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:35,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:21:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:35,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:35,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:35,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 01:21:35,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:21:35,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:35,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:35,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:36,102 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-27 01:21:36,404 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-27 01:21:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:36,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:36,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:36,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 01:21:36,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:21:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:36,929 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-27 01:21:36,956 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 01:21:36,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514533176] [2020-10-27 01:21:36,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:21:36,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:21:36,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347316698] [2020-10-27 01:21:36,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:21:36,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:21:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:21:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:21:36,961 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 26 states. [2020-10-27 01:21:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:21:38,525 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-27 01:21:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:21:38,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2020-10-27 01:21:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:21:38,528 INFO L225 Difference]: With dead ends: 49 [2020-10-27 01:21:38,529 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:21:38,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:21:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:21:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 01:21:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:21:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-27 01:21:38,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 48 [2020-10-27 01:21:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:21:38,541 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-27 01:21:38,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:21:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-27 01:21:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:21:38,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:21:38,543 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 01:21:38,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:21:38,544 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:21:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:21:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash 991393127, now seen corresponding path program 1 times [2020-10-27 01:21:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:21:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21236773] [2020-10-27 01:21:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:21:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:38,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:21:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:21:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:21:43,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:43,942 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 01:21:44,056 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-27 01:21:44,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:21:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:44,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:21:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:21:44,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:44,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:21:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:44,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:44,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:21:44,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:21:44,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:21:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:21:44,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:44,980 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-27 01:21:45,224 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-27 01:21:45,375 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-27 01:21:45,564 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-27 01:21:45,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:21:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:21:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:21:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:21:45,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:21:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:45,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:45,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:45,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:21:45,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 01:21:45,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:45,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:21:45,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:45,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:21:45,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:21:46,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:21:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:21:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:21:46,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:21:46,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:21:46,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:21:46,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-27 01:21:46,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:21:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:21:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:21:46,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:21:46,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0