/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:03:59,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:03:59,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:03:59,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:03:59,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:03:59,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:03:59,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:03:59,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:03:59,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:03:59,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:03:59,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:03:59,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:03:59,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:03:59,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:03:59,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:03:59,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:03:59,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:03:59,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:03:59,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:03:59,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:03:59,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:03:59,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:03:59,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:03:59,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:03:59,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 23:03:59,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 23:03:59,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 23:03:59,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 23:03:59,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 23:03:59,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 23:03:59,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 23:03:59,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 23:03:59,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 23:03:59,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 23:03:59,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 23:03:59,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 23:03:59,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 23:03:59,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 23:03:59,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:03:59,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:03:59,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:03:59,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:03:59,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:03:59,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:03:59,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:03:59,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:03:59,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:03:59,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:03:59,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:03:59,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:03:59,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:03:59,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:03:59,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:03:59,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:03:59,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:03:59,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:03:59,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:03:59,816 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:03:59,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:03:59,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:03:59,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:03:59,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:03:59,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:03:59,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:03:59,818 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:04:00,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:04:00,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:04:00,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:04:00,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:04:00,374 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:04:00,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2021-02-23 23:04:00,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf54591d2/76f1b4a401574d3b8f6ab14175168c1b/FLAG901a9e4bf [2021-02-23 23:04:01,497 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:04:01,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i [2021-02-23 23:04:01,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf54591d2/76f1b4a401574d3b8f6ab14175168c1b/FLAG901a9e4bf [2021-02-23 23:04:01,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf54591d2/76f1b4a401574d3b8f6ab14175168c1b [2021-02-23 23:04:01,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:04:01,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:04:01,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:04:01,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:04:01,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:04:01,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:04:01" (1/1) ... [2021-02-23 23:04:01,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18430203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:01, skipping insertion in model container [2021-02-23 23:04:01,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:04:01" (1/1) ... [2021-02-23 23:04:01,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:04:01,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:04:02,173 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i[23375,23388] [2021-02-23 23:04:02,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:04:02,211 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:04:02,329 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i[23375,23388] [2021-02-23 23:04:02,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:04:02,438 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:04:02,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02 WrapperNode [2021-02-23 23:04:02,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:04:02,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:04:02,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:04:02,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:04:02,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... [2021-02-23 23:04:02,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:04:02,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:04:02,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:04:02,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:04:02,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-23 23:04:02,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:04:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:04:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:04:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 23:04:02,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 23:04:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-23 23:04:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-23 23:04:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-23 23:04:02,835 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 23:04:02,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:04:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:04:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:04:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:04:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:04:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:04:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:04:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:04:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:04:02,837 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:04:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:04:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:04:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:04:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:04:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:04:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:04:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:04:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:04:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:04:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 23:04:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 23:04:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-23 23:04:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-23 23:04:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-23 23:04:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:04:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:04:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:04:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:04:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:04:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:04:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:04:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:04:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:04:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:04:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:04:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:04:02,844 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:04:02,845 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:04:02,846 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:04:02,847 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:04:02,848 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:04:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:04:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:04:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:04:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:04:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:04:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:04:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:04:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:04:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:04:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:04:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:04:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:04:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:04:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:04:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:04:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:04:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:04:02,855 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:04:02,855 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:04:02,855 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:04:02,855 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:04:02,855 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:04:02,856 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 23:04:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:04:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:04:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:04:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:04:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:04:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:04:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:04:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:04:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:04:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:04:03,397 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 23:04:03,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:04:03,725 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-23 23:04:03,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:04:03 BoogieIcfgContainer [2021-02-23 23:04:03,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:04:03,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:04:03,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:04:03,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:04:03,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:04:01" (1/3) ... [2021-02-23 23:04:03,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203379aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:04:03, skipping insertion in model container [2021-02-23 23:04:03,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:02" (2/3) ... [2021-02-23 23:04:03,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203379aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:04:03, skipping insertion in model container [2021-02-23 23:04:03,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:04:03" (3/3) ... [2021-02-23 23:04:03,760 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2021-02-23 23:04:03,774 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:04:03,781 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:04:03,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:04:03,844 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:04:03,844 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:04:03,844 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:04:03,844 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:04:03,845 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:04:03,845 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:04:03,845 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:04:03,845 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:04:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2021-02-23 23:04:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-23 23:04:03,888 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:03,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:03,890 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash -644551900, now seen corresponding path program 1 times [2021-02-23 23:04:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:03,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35757219] [2021-02-23 23:04:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:04,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35757219] [2021-02-23 23:04:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 23:04:04,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726049166] [2021-02-23 23:04:04,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 23:04:04,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 23:04:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:04:04,269 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 3 states. [2021-02-23 23:04:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:04,496 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-02-23 23:04:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 23:04:04,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-02-23 23:04:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:04,507 INFO L225 Difference]: With dead ends: 94 [2021-02-23 23:04:04,507 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 23:04:04,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:04:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 23:04:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-02-23 23:04:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-23 23:04:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-02-23 23:04:04,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 30 [2021-02-23 23:04:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:04,562 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-02-23 23:04:04,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 23:04:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-02-23 23:04:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 23:04:04,564 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:04,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:04,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:04:04,564 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash 338946844, now seen corresponding path program 1 times [2021-02-23 23:04:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:04,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379547507] [2021-02-23 23:04:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:04,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:04,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:04,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:04,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:04,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:04,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379547507] [2021-02-23 23:04:04,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:04,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:04:04,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885160278] [2021-02-23 23:04:04,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:04:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:04,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:04:04,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:04:04,869 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2021-02-23 23:04:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:05,329 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-02-23 23:04:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:04:05,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-02-23 23:04:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:05,333 INFO L225 Difference]: With dead ends: 126 [2021-02-23 23:04:05,333 INFO L226 Difference]: Without dead ends: 119 [2021-02-23 23:04:05,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:04:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-23 23:04:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-02-23 23:04:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-23 23:04:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-02-23 23:04:05,353 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 34 [2021-02-23 23:04:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:05,354 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-02-23 23:04:05,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:04:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-02-23 23:04:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:04:05,355 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:05,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:05,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:04:05,356 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash -618579532, now seen corresponding path program 1 times [2021-02-23 23:04:05,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:05,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885490033] [2021-02-23 23:04:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:05,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:05,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:05,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:05,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:05,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:05,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:05,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:05,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:05,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:05,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885490033] [2021-02-23 23:04:05,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:05,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:04:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664438893] [2021-02-23 23:04:05,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:04:05,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:04:05,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:04:05,602 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 7 states. [2021-02-23 23:04:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:05,988 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-02-23 23:04:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:04:05,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-02-23 23:04:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:05,991 INFO L225 Difference]: With dead ends: 121 [2021-02-23 23:04:05,991 INFO L226 Difference]: Without dead ends: 107 [2021-02-23 23:04:05,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:04:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-23 23:04:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 65. [2021-02-23 23:04:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 23:04:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-02-23 23:04:06,003 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 40 [2021-02-23 23:04:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:06,004 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-02-23 23:04:06,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:04:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-02-23 23:04:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:04:06,005 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:06,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:06,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:04:06,006 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1817495092, now seen corresponding path program 1 times [2021-02-23 23:04:06,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:06,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150764378] [2021-02-23 23:04:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:06,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:06,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:06,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:04:06,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:06,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:06,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150764378] [2021-02-23 23:04:06,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:06,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:04:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219033056] [2021-02-23 23:04:06,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:04:06,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:06,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:04:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:04:06,205 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2021-02-23 23:04:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:06,510 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2021-02-23 23:04:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 23:04:06,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-02-23 23:04:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:06,513 INFO L225 Difference]: With dead ends: 104 [2021-02-23 23:04:06,513 INFO L226 Difference]: Without dead ends: 86 [2021-02-23 23:04:06,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:04:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-23 23:04:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-02-23 23:04:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 23:04:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-02-23 23:04:06,523 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 40 [2021-02-23 23:04:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:06,523 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-02-23 23:04:06,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:04:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-02-23 23:04:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 23:04:06,525 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:06,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:06,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:04:06,525 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2124694086, now seen corresponding path program 1 times [2021-02-23 23:04:06,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:06,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759413171] [2021-02-23 23:04:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:06,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:06,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:06,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:06,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:04:06,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759413171] [2021-02-23 23:04:06,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:06,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:04:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597467126] [2021-02-23 23:04:06,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:04:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:04:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:04:06,699 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 4 states. [2021-02-23 23:04:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:06,880 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-02-23 23:04:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:04:06,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2021-02-23 23:04:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:06,882 INFO L225 Difference]: With dead ends: 115 [2021-02-23 23:04:06,882 INFO L226 Difference]: Without dead ends: 79 [2021-02-23 23:04:06,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:04:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-23 23:04:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-02-23 23:04:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 23:04:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-02-23 23:04:06,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 46 [2021-02-23 23:04:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:06,910 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-02-23 23:04:06,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:04:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-02-23 23:04:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 23:04:06,912 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:06,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:06,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:04:06,913 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -512547002, now seen corresponding path program 1 times [2021-02-23 23:04:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:06,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096045866] [2021-02-23 23:04:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:06,983 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:07,025 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:07,079 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:04:07,079 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:04:07,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:04:07,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:04:07 BoogieIcfgContainer [2021-02-23 23:04:07,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:04:07,129 INFO L168 Benchmark]: Toolchain (without parser) took 5426.37 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 133.4 MB in the beginning and 98.9 MB in the end (delta: 34.5 MB). Peak memory consumption was 73.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:07,129 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 157.3 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:04:07,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 719.50 ms. Allocated memory is still 157.3 MB. Free memory was 132.3 MB in the beginning and 110.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:07,130 INFO L168 Benchmark]: Boogie Preprocessor took 244.56 ms. Allocated memory is still 157.3 MB. Free memory was 110.4 MB in the beginning and 139.4 MB in the end (delta: -29.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:07,131 INFO L168 Benchmark]: RCFGBuilder took 1037.86 ms. Allocated memory is still 157.3 MB. Free memory was 139.4 MB in the beginning and 94.3 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:07,132 INFO L168 Benchmark]: TraceAbstraction took 3396.48 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 93.8 MB in the beginning and 98.9 MB in the end (delta: -5.1 MB). Peak memory consumption was 34.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:07,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 157.3 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 719.50 ms. Allocated memory is still 157.3 MB. Free memory was 132.3 MB in the beginning and 110.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 244.56 ms. Allocated memory is still 157.3 MB. Free memory was 110.4 MB in the beginning and 139.4 MB in the end (delta: -29.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1037.86 ms. Allocated memory is still 157.3 MB. Free memory was 139.4 MB in the beginning and 94.3 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3396.48 ms. Allocated memory was 157.3 MB in the beginning and 195.0 MB in the end (delta: 37.7 MB). Free memory was 93.8 MB in the beginning and 98.9 MB in the end (delta: -5.1 MB). Peak memory consumption was 34.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, flag=0] [L533] List p, a, t; VAL [flag=0] [L534] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}] [L535] COND FALSE !(a == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}] [L536] p = a VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L538] COND FALSE !(\read(flag)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L541] p->h = 2 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L543] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L544] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L545] p->n = t VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L546] EXPR p->n VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L546] p = p->n VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L548] p->h = 3 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L549] p = a VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L550] COND FALSE !(\read(flag)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L554] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L554] COND FALSE !(p->h == 1) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L556] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L556] COND TRUE p->h != 3 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L557] reach_error() VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 288 SDtfs, 238 SDslu, 531 SDs, 0 SdLazy, 598 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 126 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 185 ConstructedInterpolants, 0 QuantifiedInterpolants, 18175 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...