/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-simple/sll2n_prepend_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:07:55,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:07:55,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:07:55,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:07:55,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:07:56,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:07:56,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:07:56,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:07:56,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:07:56,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:07:56,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:07:56,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:07:56,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:07:56,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:07:56,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:07:56,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:07:56,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:07:56,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:07:56,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:07:56,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:07:56,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:07:56,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:07:56,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:07:56,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:07:56,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:07:56,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:07:56,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:07:56,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:07:56,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:07:56,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:07:56,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:07:56,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:07:56,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:07:56,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:07:56,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:07:56,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:07:56,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:07:56,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:07:56,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:07:56,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:07:56,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:07:56,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:07:56,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:07:56,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:07:56,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:07:56,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:07:56,154 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:07:56,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:07:56,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:07:56,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:07:56,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:07:56,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:07:56,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:07:56,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:07:56,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:07:56,157 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:07:56,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:07:56,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:07:56,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:07:56,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:07:56,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:07:56,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:07:56,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:07:56,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:07:56,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:07:56,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:07:56,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:07:56,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:07:56,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:07:56,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:07:56,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:07:56,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:07:56,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:07:56,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:07:56,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:07:56,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:07:56,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:07:56,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_prepend_unequal.i [2020-10-27 20:07:56,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a9cd107/9f5135e38c87405e8ca668281becda06/FLAGe174ede3f [2020-10-27 20:07:57,501 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:07:57,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_prepend_unequal.i [2020-10-27 20:07:57,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a9cd107/9f5135e38c87405e8ca668281becda06/FLAGe174ede3f [2020-10-27 20:07:57,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81a9cd107/9f5135e38c87405e8ca668281becda06 [2020-10-27 20:07:57,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:07:57,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:07:57,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:07:57,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:07:57,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:07:57,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:07:57" (1/1) ... [2020-10-27 20:07:57,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252e0a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:57, skipping insertion in model container [2020-10-27 20:07:57,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:07:57" (1/1) ... [2020-10-27 20:07:57,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:07:57,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:07:58,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:07:58,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:07:58,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:07:58,292 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:07:58,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58 WrapperNode [2020-10-27 20:07:58,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:07:58,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:07:58,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:07:58,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:07:58,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... [2020-10-27 20:07:58,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:07:58,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:07:58,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:07:58,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:07:58,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:07:58,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:07:58,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:07:58,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:07:58,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:07:58,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:07:58,456 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:07:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 20:07:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-27 20:07:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-27 20:07:58,459 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2020-10-27 20:07:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:07:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:07:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:07:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:07:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:07:58,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:07:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:07:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:07:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:07:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:07:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:07:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:07:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:07:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:07:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:07:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:07:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:07:58,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:07:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:07:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:07:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:07:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:07:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:07:58,473 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:07:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:07:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:07:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:07:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:07:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:07:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:07:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:07:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:07:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:07:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:07:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:07:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:07:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:07:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:07:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:07:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:07:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:07:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:07:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:07:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:07:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:07:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 20:07:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:07:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:07:58,483 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:07:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:07:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:07:58,484 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:07:58,485 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:07:58,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:07:58,487 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:07:58,488 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:07:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:07:58,489 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:07:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:07:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:07:58,490 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-27 20:07:58,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:07:58,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:07:58,493 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2020-10-27 20:07:58,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:07:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 20:07:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:07:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:07:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:07:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:07:59,046 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:07:59,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:07:59,373 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:07:59,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:07:59 BoogieIcfgContainer [2020-10-27 20:07:59,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:07:59,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:07:59,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:07:59,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:07:59,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:07:57" (1/3) ... [2020-10-27 20:07:59,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f78c780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:07:59, skipping insertion in model container [2020-10-27 20:07:59,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:07:58" (2/3) ... [2020-10-27 20:07:59,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f78c780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:07:59, skipping insertion in model container [2020-10-27 20:07:59,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:07:59" (3/3) ... [2020-10-27 20:07:59,394 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2020-10-27 20:07:59,408 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:07:59,415 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:07:59,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:07:59,477 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:07:59,477 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:07:59,477 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:07:59,478 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:07:59,478 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:07:59,478 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:07:59,478 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:07:59,478 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:07:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-27 20:07:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:07:59,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:07:59,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:07:59,518 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:07:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:07:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1332459150, now seen corresponding path program 1 times [2020-10-27 20:07:59,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:07:59,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636576134] [2020-10-27 20:07:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:07:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:07:59,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:08:01,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:01,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-27 20:08:01,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:08:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:08:01,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:01,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:01,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:01,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:08:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:08:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:01,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:08:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:01,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:01,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:01,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:01,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:01,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:01,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:01,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:01,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:01,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:01,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636576134] [2020-10-27 20:08:01,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:01,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:08:01,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623285200] [2020-10-27 20:08:01,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:08:01,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:01,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:08:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:08:01,678 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 7 states. [2020-10-27 20:08:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:02,182 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-10-27 20:08:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:08:02,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-27 20:08:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:02,197 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:08:02,197 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 20:08:02,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:08:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 20:08:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-27 20:08:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:08:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 20:08:02,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 29 [2020-10-27 20:08:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:02,268 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 20:08:02,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:08:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 20:08:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:08:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:02,272 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 20:08:02,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:08:02,272 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1169543150, now seen corresponding path program 1 times [2020-10-27 20:08:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:02,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4879876] [2020-10-27 20:08:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 20:08:04,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:04,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2015 [2020-10-27 20:08:04,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:08:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:08:04,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:04,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:04,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:04,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:04,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:04,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:04,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:04,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:04,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:04,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:08:04,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:08:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:04,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:04,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:08:04,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:04,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:04,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:04,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 20:08:04,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:08:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:08:04,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:04,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:04,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:04,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:04,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 20:08:04,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:04,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:04,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:04,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:08:04,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:08:04,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4879876] [2020-10-27 20:08:04,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:04,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 20:08:04,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721114122] [2020-10-27 20:08:04,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:08:04,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:08:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:08:04,992 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-27 20:08:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:05,503 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-27 20:08:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:08:05,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 20:08:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:05,507 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:08:05,508 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:08:05,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:08:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:08:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 20:08:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:08:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 20:08:05,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 38 [2020-10-27 20:08:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:05,530 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 20:08:05,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:08:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 20:08:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:08:05,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:05,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:05,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:08:05,533 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1373420899, now seen corresponding path program 1 times [2020-10-27 20:08:05,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:05,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171000351] [2020-10-27 20:08:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:05,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:06,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:09,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:09,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:08:09,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:09,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3941 [2020-10-27 20:08:09,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:08:09,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:09,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:08:09,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:09,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:09,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:09,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:09,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:09,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:09,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:09,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:09,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:09,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:09,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:08:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:09,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:08:09,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:09,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:09,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:09,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:09,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:09,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:08:09,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:09,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:09,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:09,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:09,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:09,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 20:08:09,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:10,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:10,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:10,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:10,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:10,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:08:10,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:10,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:08:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171000351] [2020-10-27 20:08:10,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:10,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:08:10,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576707448] [2020-10-27 20:08:10,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:08:10,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:08:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:08:10,336 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 20 states. [2020-10-27 20:08:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:11,201 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-27 20:08:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:08:11,202 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-27 20:08:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:11,203 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:08:11,204 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:08:11,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:08:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:08:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-27 20:08:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:08:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-27 20:08:11,222 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 40 [2020-10-27 20:08:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:11,222 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-27 20:08:11,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:08:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-27 20:08:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 20:08:11,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:11,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:11,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:08:11,226 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1375029613, now seen corresponding path program 1 times [2020-10-27 20:08:11,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:11,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137467850] [2020-10-27 20:08:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:11,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:11,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:12,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:12,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:08:12,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:12,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1689 [2020-10-27 20:08:12,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:12,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:12,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:12,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:12,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:12,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:13,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:08:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:08:13,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:13,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:13,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:13,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:08:13,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:13,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:13,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:13,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:13,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:13,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 20:08:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:13,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:13,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:13,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:13,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:13,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:13,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:13,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:13,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:08:13,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137467850] [2020-10-27 20:08:13,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:13,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:08:13,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816525771] [2020-10-27 20:08:13,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:08:13,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:08:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:08:13,156 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-10-27 20:08:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:13,355 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-27 20:08:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:08:13,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-27 20:08:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:13,357 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:08:13,357 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:08:13,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:08:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:08:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 20:08:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:08:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 20:08:13,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 40 [2020-10-27 20:08:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:13,367 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 20:08:13,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:08:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 20:08:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:08:13,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:13,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:13,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:08:13,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash -15043223, now seen corresponding path program 2 times [2020-10-27 20:08:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:13,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70755801] [2020-10-27 20:08:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:13,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:17,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:08:17,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3797 [2020-10-27 20:08:17,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:08:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:17,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:08:17,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:17,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:17,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:17,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:17,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:17,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:17,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:17,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:17,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:17,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 20:08:17,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:08:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:17,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:17,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:17,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:08:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:17,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:17,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:08:17,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:17,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:17,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:17,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:08:17,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:17,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:08:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:17,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:18,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 20:08:18,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:08:18,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:18,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:18,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:18,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:18,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:18,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:18,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 20:08:18,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:18,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:18,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:18,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:18,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:18,954 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-27 20:08:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 20:08:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70755801] [2020-10-27 20:08:18,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:18,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:08:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791276684] [2020-10-27 20:08:18,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:08:18,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:08:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:08:18,983 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 22 states. [2020-10-27 20:08:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:20,470 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-27 20:08:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:08:20,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 20:08:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:20,472 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:08:20,472 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:08:20,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:08:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:08:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 20:08:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:08:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-27 20:08:20,482 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 49 [2020-10-27 20:08:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:20,483 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-27 20:08:20,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:08:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-27 20:08:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:08:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:20,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:20,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:08:20,484 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1548678918, now seen corresponding path program 1 times [2020-10-27 20:08:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:20,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706163389] [2020-10-27 20:08:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:20,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:21,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:22,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:08:22,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:22,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:22,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:22,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:22,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:08:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:08:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:22,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:22,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:22,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:08:22,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:22,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:08:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:22,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:23,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:23,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:23,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:23,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:08:23,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:23,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:23,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:08:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:23,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:23,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:23,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:24,098 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-27 20:08:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:24,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:24,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:24,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:24,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:08:24,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:24,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:24,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:08:24,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706163389] [2020-10-27 20:08:24,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:24,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:08:24,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397005524] [2020-10-27 20:08:24,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:08:24,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:24,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:08:24,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:08:24,437 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 26 states. [2020-10-27 20:08:26,137 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 20:08:26,319 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-27 20:08:26,525 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-27 20:08:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:27,004 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-10-27 20:08:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:08:27,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-27 20:08:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:27,006 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:08:27,006 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:08:27,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:08:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:08:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-27 20:08:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:08:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-27 20:08:27,026 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 51 [2020-10-27 20:08:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:27,027 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-27 20:08:27,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:08:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-27 20:08:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:08:27,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:27,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:27,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:08:27,028 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1547070204, now seen corresponding path program 1 times [2020-10-27 20:08:27,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:27,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424183859] [2020-10-27 20:08:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:27,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:32,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:32,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:08:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:32,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:32,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:32,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:32,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:32,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:32,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:08:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:32,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:08:32,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:33,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:33,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:33,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:33,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:33,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:33,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:08:33,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:33,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:33,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:08:33,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:33,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:08:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:33,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:33,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:33,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:33,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:08:33,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:08:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:33,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:33,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:08:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:33,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:08:33,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:33,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:34,069 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 20:08:34,789 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 20:08:34,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:34,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:34,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:34,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:34,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:34,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:08:34,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:34,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:34,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:35,253 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 20:08:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:08:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424183859] [2020-10-27 20:08:35,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:35,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:08:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118755704] [2020-10-27 20:08:35,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:08:35,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:08:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:08:35,283 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 27 states. [2020-10-27 20:08:35,929 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 20:08:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:37,878 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-27 20:08:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:08:37,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-10-27 20:08:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:37,881 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:08:37,881 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:08:37,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:08:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:08:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-27 20:08:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:08:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-27 20:08:37,892 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 51 [2020-10-27 20:08:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:37,893 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-27 20:08:37,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:08:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-27 20:08:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:08:37,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:37,894 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:37,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:08:37,894 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash -652825131, now seen corresponding path program 2 times [2020-10-27 20:08:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:37,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128958442] [2020-10-27 20:08:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:38,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:38,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:08:38,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 20:08:38,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:38,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:38,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:38,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:38,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:38,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:38,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:38,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:38,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:38,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:38,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:38,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:38,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:38,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:38,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:38,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:08:38,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:38,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:39,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:08:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:08:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:08:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:08:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:39,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:08:39,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128958442] [2020-10-27 20:08:39,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:39,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:08:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363439922] [2020-10-27 20:08:39,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:08:39,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:39,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:08:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:08:39,089 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 13 states. [2020-10-27 20:08:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:39,572 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-27 20:08:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:08:39,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-27 20:08:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:39,574 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:08:39,574 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:08:39,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:08:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:08:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-10-27 20:08:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:08:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-27 20:08:39,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 53 [2020-10-27 20:08:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:39,597 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-27 20:08:39,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:08:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-27 20:08:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:08:39,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:39,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:39,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:08:39,604 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash -651216417, now seen corresponding path program 2 times [2020-10-27 20:08:39,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:39,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497109196] [2020-10-27 20:08:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:40,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:42,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2809 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:08:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:42,894 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2020-10-27 20:08:43,221 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 51 [2020-10-27 20:08:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:43,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:43,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:43,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:43,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:43,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:43,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:43,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:08:43,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:44,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:08:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:44,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:44,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:44,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:44,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 20:08:44,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:08:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:44,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:08:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:08:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:44,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:08:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:44,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:44,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:44,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 20:08:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:08:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:45,531 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 20:08:48,843 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 240 DAG size of output: 157 [2020-10-27 20:08:49,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:08:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:49,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:49,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:08:49,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:08:49,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:08:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:08:49,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:08:49,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:08:49,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497109196] [2020-10-27 20:08:49,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:08:49,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:08:49,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339585916] [2020-10-27 20:08:49,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:08:49,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:08:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:08:49,580 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 29 states. [2020-10-27 20:08:51,525 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 20:08:51,846 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-27 20:08:52,121 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 20:08:52,431 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2020-10-27 20:08:52,720 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-27 20:08:52,995 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-27 20:08:53,216 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-27 20:08:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:53,506 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 20:08:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:08:53,507 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 53 [2020-10-27 20:08:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:53,508 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:08:53,508 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:08:53,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=158, Invalid=1734, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:08:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:08:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-27 20:08:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:08:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-27 20:08:53,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 53 [2020-10-27 20:08:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:53,535 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-27 20:08:53,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:08:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-27 20:08:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:08:53,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:53,540 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-27 20:08:53,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:08:53,540 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash 123365219, now seen corresponding path program 3 times [2020-10-27 20:08:53,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:53,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166499706] [2020-10-27 20:08:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:58,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:08:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:59,092 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 96 [2020-10-27 20:08:59,499 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 99 [2020-10-27 20:08:59,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:59,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:59,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:59,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:59,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:08:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:59,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:09:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:09:00,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:01,614 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-27 20:09:01,856 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-27 20:09:02,113 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-27 20:09:02,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 20:09:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:02,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:02,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 20:09:02,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:09:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:02,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:09:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:09:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:02,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:02,834 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-27 20:09:02,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 20:09:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:09:02,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:03,412 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 20:09:03,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 20:09:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:03,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 20:09:03,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:03,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:09:03,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:09:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:10,507 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39