/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:19:26,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:19:26,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:19:26,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:19:26,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:19:26,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:19:26,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:19:26,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:19:26,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:19:26,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:19:26,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:19:26,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:19:26,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:19:26,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:19:26,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:19:26,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:19:26,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:19:26,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:19:26,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:19:26,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:19:26,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:19:26,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:19:26,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:19:26,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:19:26,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:19:26,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:19:26,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:19:26,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:19:26,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:19:26,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:19:26,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:19:26,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:19:26,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:19:26,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:19:26,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:19:26,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:19:26,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:19:26,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:19:26,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:19:26,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:19:26,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:19:26,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:19:26,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:19:26,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:19:26,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:19:26,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:19:26,550 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:19:26,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:19:26,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:19:26,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:19:26,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:19:26,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:19:26,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:19:26,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:19:26,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:19:26,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:19:26,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:19:26,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:19:26,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:19:26,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:19:26,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:19:26,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:19:26,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:19:26,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:26,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:19:26,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:19:26,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:19:26,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:19:26,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:19:26,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:19:26,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:19:26,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:19:27,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:19:27,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:19:27,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:19:27,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:19:27,045 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:19:27,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-27 01:19:27,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/945bfcf53/8d10be95c9dd445abffc350ebe8d0c9c/FLAG516f9c24f [2020-10-27 01:19:27,790 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:19:27,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-10-27 01:19:27,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/945bfcf53/8d10be95c9dd445abffc350ebe8d0c9c/FLAG516f9c24f [2020-10-27 01:19:28,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/945bfcf53/8d10be95c9dd445abffc350ebe8d0c9c [2020-10-27 01:19:28,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:19:28,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:19:28,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:28,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:19:28,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:19:28,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356c194a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28, skipping insertion in model container [2020-10-27 01:19:28,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:19:28,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:19:28,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:28,592 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:19:28,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:19:28,723 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:19:28,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28 WrapperNode [2020-10-27 01:19:28,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:19:28,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:19:28,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:19:28,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:19:28,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... [2020-10-27 01:19:28,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:19:28,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:19:28,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:19:28,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:19:28,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:19:28,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:19:28,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:19:28,928 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:19:28,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:19:28,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:19:28,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 01:19:28,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 01:19:28,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 01:19:28,930 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:19:28,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:19:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:19:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:19:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:19:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:19:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:19:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:19:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:19:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:19:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:19:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:19:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:19:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:19:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:19:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:19:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:19:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:19:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:19:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:19:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:19:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:19:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:19:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:19:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:19:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:19:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:19:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 01:19:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 01:19:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 01:19:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:19:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:19:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:19:28,940 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:19:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:19:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:19:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:19:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:19:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:19:28,959 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:19:28,960 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:19:28,960 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:19:28,960 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:19:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:19:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:19:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:19:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:19:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:19:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:19:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:19:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:19:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:19:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:19:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:19:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:19:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:19:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:19:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:19:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:19:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:19:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:19:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:19:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:19:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:19:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:19:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:19:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:19:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:19:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:19:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:19:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:19:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:19:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:19:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:19:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:19:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:19:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:19:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:19:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:19:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:19:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:19:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:19:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:19:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:19:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:19:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:19:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:19:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:19:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:19:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:19:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:19:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:19:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:19:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:19:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:19:28,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:19:28,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:19:28,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:19:28,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:19:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:19:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:19:29,561 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:19:29,766 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:19:29,766 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:19:29,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:29 BoogieIcfgContainer [2020-10-27 01:19:29,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:19:29,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:19:29,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:19:29,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:19:29,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:19:28" (1/3) ... [2020-10-27 01:19:29,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dbd47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:29, skipping insertion in model container [2020-10-27 01:19:29,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:19:28" (2/3) ... [2020-10-27 01:19:29,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dbd47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:19:29, skipping insertion in model container [2020-10-27 01:19:29,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:19:29" (3/3) ... [2020-10-27 01:19:29,777 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-27 01:19:29,790 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:19:29,796 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:19:29,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:19:29,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:19:29,838 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:19:29,838 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:19:29,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:19:29,839 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:19:29,839 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:19:29,839 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:19:29,839 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:19:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 01:19:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:19:29,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:29,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:29,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-27 01:19:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:29,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716426265] [2020-10-27 01:19:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:30,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:30,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:19:30,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:19:30,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 01:19:30,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:30,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:19:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:30,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:30,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:30,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:30,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:30,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 01:19:30,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:30,880 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 01:19:30,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716426265] [2020-10-27 01:19:30,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:30,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245715076] [2020-10-27 01:19:30,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:30,919 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-27 01:19:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:31,410 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-27 01:19:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:31,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:19:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:31,423 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:19:31,423 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:19:31,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:19:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-27 01:19:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:19:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 01:19:31,476 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2020-10-27 01:19:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:31,476 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 01:19:31,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 01:19:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:19:31,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:31,478 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:31,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:19:31,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-27 01:19:31,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:31,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372221896] [2020-10-27 01:19:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:19:31,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:31,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 01:19:31,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:19:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:31,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:31,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:31,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:31,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:19:31,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:31,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:31,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:31,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:31,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:31,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372221896] [2020-10-27 01:19:31,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:31,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:31,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715031628] [2020-10-27 01:19:31,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:31,716 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-27 01:19:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:31,948 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 01:19:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:31,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:19:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:31,950 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:19:31,951 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:19:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:19:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-27 01:19:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:19:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-27 01:19:31,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-27 01:19:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:31,960 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-27 01:19:31,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-27 01:19:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:19:31,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:31,962 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:31,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:19:31,962 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-27 01:19:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:31,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511133409] [2020-10-27 01:19:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:19:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:19:32,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:32,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:32,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:32,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:32,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:32,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:32,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511133409] [2020-10-27 01:19:32,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:19:32,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:19:32,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447351618] [2020-10-27 01:19:32,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:19:32,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:19:32,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:19:32,233 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-27 01:19:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:32,463 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-27 01:19:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:19:32,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:19:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:32,465 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:19:32,465 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:19:32,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:19:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:19:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-27 01:19:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:19:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-27 01:19:32,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-27 01:19:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:32,473 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-27 01:19:32,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:19:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-27 01:19:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:19:32,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:32,474 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:19:32,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:19:32,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:32,475 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-27 01:19:32,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:32,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483253076] [2020-10-27 01:19:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:19:32,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 01:19:32,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:19:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:19:32,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:32,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:32,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:32,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:32,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:32,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:32,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:32,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:32,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483253076] [2020-10-27 01:19:32,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:32,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:32,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704309977] [2020-10-27 01:19:32,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:32,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:32,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:32,985 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-27 01:19:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:33,436 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-27 01:19:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:33,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:19:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:33,438 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:19:33,438 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:19:33,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:19:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-27 01:19:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:19:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 01:19:33,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2020-10-27 01:19:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:33,446 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 01:19:33,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 01:19:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:19:33,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:33,448 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:19:33,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:19:33,448 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-27 01:19:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:33,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332007727] [2020-10-27 01:19:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:33,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:33,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:19:33,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:19:33,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:34,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:19:34,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332007727] [2020-10-27 01:19:34,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:34,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:19:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945674781] [2020-10-27 01:19:34,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:19:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:19:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:19:34,029 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-27 01:19:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:34,624 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-27 01:19:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:19:34,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-27 01:19:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:34,626 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:19:34,626 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:19:34,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:19:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-27 01:19:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:19:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-27 01:19:34,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2020-10-27 01:19:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:34,635 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-27 01:19:34,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:19:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-27 01:19:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:19:34,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:34,637 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:19:34,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:19:34,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash 965245677, now seen corresponding path program 1 times [2020-10-27 01:19:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:34,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240265837] [2020-10-27 01:19:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:34,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:34,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:34,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:19:34,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:34,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 01:19:34,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:34,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:35,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:35,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:35,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:35,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:19:35,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:35,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240265837] [2020-10-27 01:19:35,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:35,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:35,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959233103] [2020-10-27 01:19:35,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:35,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:35,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:35,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:35,129 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-10-27 01:19:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:35,757 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-27 01:19:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:35,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:19:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:35,760 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:19:35,760 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:19:35,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:19:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-27 01:19:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:19:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-27 01:19:35,783 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 28 [2020-10-27 01:19:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:35,784 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-27 01:19:35,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-27 01:19:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:35,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:35,788 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:19:35,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:19:35,789 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash -596532632, now seen corresponding path program 1 times [2020-10-27 01:19:35,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:35,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492558957] [2020-10-27 01:19:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:36,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 01:19:36,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:36,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:36,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:36,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:36,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:36,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:36,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492558957] [2020-10-27 01:19:36,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:36,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:36,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301632789] [2020-10-27 01:19:36,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:36,270 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 10 states. [2020-10-27 01:19:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:36,816 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-27 01:19:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:36,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:19:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:36,822 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:19:36,823 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:19:36,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:19:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-27 01:19:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:19:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 01:19:36,838 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-27 01:19:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:36,838 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 01:19:36,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 01:19:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:36,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:36,841 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:36,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:19:36,841 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 2 times [2020-10-27 01:19:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:36,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870990863] [2020-10-27 01:19:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:36,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:37,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:19:37,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:19:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:19:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:37,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:37,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:37,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:19:37,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:37,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:37,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:37,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870990863] [2020-10-27 01:19:37,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:37,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:19:37,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942114661] [2020-10-27 01:19:37,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:19:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:19:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:19:37,319 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-27 01:19:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:37,782 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-27 01:19:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:37,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:19:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:37,785 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:19:37,785 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:19:37,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:19:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 01:19:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:19:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-27 01:19:37,792 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-27 01:19:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:37,793 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-27 01:19:37,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:19:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-27 01:19:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:37,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:37,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:37,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:19:37,794 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-27 01:19:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:37,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621823088] [2020-10-27 01:19:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:38,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 01:19:38,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:19:38,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:38,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:19:38,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:38,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:38,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621823088] [2020-10-27 01:19:38,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:38,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:19:38,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261337136] [2020-10-27 01:19:38,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:19:38,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:19:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:19:38,301 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-27 01:19:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:38,701 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 01:19:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:19:38,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:19:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:38,703 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:19:38,703 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:19:38,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:19:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:19:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-27 01:19:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:19:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-27 01:19:38,712 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2020-10-27 01:19:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:38,713 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-27 01:19:38,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:19:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-27 01:19:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:19:38,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:38,714 INFO L422 BasicCegarLoop]: trace histogram [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 01:19:38,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:19:38,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-27 01:19:38,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:38,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533154929] [2020-10-27 01:19:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:38,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:38,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:19:38,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:38,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:39,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:39,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:39,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:39,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:39,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533154929] [2020-10-27 01:19:39,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:39,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:19:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223365023] [2020-10-27 01:19:39,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:19:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:19:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:19:39,206 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 11 states. [2020-10-27 01:19:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:39,644 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 01:19:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:19:39,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:19:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:39,646 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:19:39,647 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:19:39,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:19:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:19:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:19:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:19:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-27 01:19:39,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-27 01:19:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:39,654 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-27 01:19:39,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:19:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-27 01:19:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:19:39,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:39,655 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 01:19:39,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:19:39,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash -981048684, now seen corresponding path program 3 times [2020-10-27 01:19:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:39,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435743709] [2020-10-27 01:19:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:39,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:39,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:19:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:19:39,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:40,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:40,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:40,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:40,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:19:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:40,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435743709] [2020-10-27 01:19:40,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:40,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:19:40,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118950581] [2020-10-27 01:19:40,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:19:40,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:19:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:19:40,312 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-27 01:19:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:41,468 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-27 01:19:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:19:41,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:19:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:41,470 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:19:41,470 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:19:41,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:19:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-27 01:19:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:19:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-27 01:19:41,478 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 32 [2020-10-27 01:19:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:41,479 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-27 01:19:41,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:19:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-27 01:19:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:19:41,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:41,480 INFO L422 BasicCegarLoop]: trace histogram [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 01:19:41,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:19:41,481 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1704140972, now seen corresponding path program 1 times [2020-10-27 01:19:41,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:41,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549785485] [2020-10-27 01:19:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:19:41,505 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:19:41,505 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:19:41,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:19:41,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:19:41 BoogieIcfgContainer [2020-10-27 01:19:41,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:19:41,535 INFO L168 Benchmark]: Toolchain (without parser) took 13450.84 ms. Allocated memory was 163.6 MB in the beginning and 285.2 MB in the end (delta: 121.6 MB). Free memory was 137.1 MB in the beginning and 192.4 MB in the end (delta: -55.3 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:19:41,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 163.6 MB. Free memory was 134.3 MB in the beginning and 134.2 MB in the end (delta: 103.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:19:41,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 636.08 ms. Allocated memory is still 163.6 MB. Free memory was 136.6 MB in the beginning and 114.9 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:19:41,545 INFO L168 Benchmark]: Boogie Preprocessor took 105.43 ms. Allocated memory is still 163.6 MB. Free memory was 114.9 MB in the beginning and 112.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:19:41,545 INFO L168 Benchmark]: RCFGBuilder took 934.65 ms. Allocated memory is still 163.6 MB. Free memory was 112.2 MB in the beginning and 107.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:19:41,549 INFO L168 Benchmark]: TraceAbstraction took 11761.74 ms. Allocated memory was 163.6 MB in the beginning and 285.2 MB in the end (delta: 121.6 MB). Free memory was 107.3 MB in the beginning and 192.4 MB in the end (delta: -85.2 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:19:41,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 163.6 MB. Free memory was 134.3 MB in the beginning and 134.2 MB in the end (delta: 103.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 636.08 ms. Allocated memory is still 163.6 MB. Free memory was 136.6 MB in the beginning and 114.9 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 105.43 ms. Allocated memory is still 163.6 MB. Free memory was 114.9 MB in the beginning and 112.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 934.65 ms. Allocated memory is still 163.6 MB. Free memory was 112.2 MB in the beginning and 107.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11761.74 ms. Allocated memory was 163.6 MB in the beginning and 285.2 MB in the end (delta: 121.6 MB). Free memory was 107.3 MB in the beginning and 192.4 MB in the end (delta: -85.2 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.6s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 237 SDtfs, 497 SDslu, 955 SDs, 0 SdLazy, 1800 SolverSat, 231 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 115 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 330 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 72709 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 10/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...