/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/ldv-regression/alt_test.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:04:17,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:04:17,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:04:17,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:04:17,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:04:17,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:04:17,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:04:17,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:04:17,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:04:17,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:04:17,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:04:17,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:04:17,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:04:17,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:04:17,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:04:17,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:04:17,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:04:17,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:04:17,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:04:17,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:04:17,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:04:17,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:04:17,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:04:17,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:04:17,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:04:17,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:04:17,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:04:17,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:04:17,948 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 23:04:17,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:04:17,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:04:17,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:04:17,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:04:17,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:04:17,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:04:17,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:04:17,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:04:17,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:04:17,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:04:17,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:04:17,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:04:17,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:04:17,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:04:17,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:04:17,985 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:04:17,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:04:17,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:04:17,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:04:17,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:04:17,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:04:17,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:04:17,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:04:18,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:04:18,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:04:18,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:04:18,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:04:18,456 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:04:18,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alt_test.i [2021-02-23 23:04:18,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd13774d3/613bdfc7d24049c5809e969659bbd102/FLAGae7667cb6 [2021-02-23 23:04:19,340 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:04:19,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i [2021-02-23 23:04:19,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd13774d3/613bdfc7d24049c5809e969659bbd102/FLAGae7667cb6 [2021-02-23 23:04:19,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd13774d3/613bdfc7d24049c5809e969659bbd102 [2021-02-23 23:04:19,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:04:19,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:04:19,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:04:19,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:04:19,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:04:19,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:04:19" (1/1) ... [2021-02-23 23:04:19,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c23bb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:19, skipping insertion in model container [2021-02-23 23:04:19,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:04:19" (1/1) ... [2021-02-23 23:04:19,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:04:19,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:04:20,009 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i[22285,22298] [2021-02-23 23:04:20,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:04:20,033 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:04:20,086 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/alt_test.i[22285,22298] [2021-02-23 23:04:20,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:04:20,162 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:04:20,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20 WrapperNode [2021-02-23 23:04:20,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:04:20,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:04:20,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:04:20,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:04:20,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (1/1) ... [2021-02-23 23:04:20,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:04:20,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:04:20,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:04:20,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:04:20,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (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 23:04:20,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:04:20,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:04:20,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:04:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 23:04:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 23:04:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-23 23:04:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-23 23:04:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-23 23:04:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 23:04:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:04:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure l_malloc [2021-02-23 23:04:20,404 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2021-02-23 23:04:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:04:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:04:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:04:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:04:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:04:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:04:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:04:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:04:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:04:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:04:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:04:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:04:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:04:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:04:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:04:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:04:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 23:04:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:04:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:04:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:04:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:04:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:04:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:04:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:04:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:04:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:04:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:04:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:04:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:04:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:04:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:04:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:04:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:04:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:04:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:04:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:04:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:04:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:04:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:04:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:04:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:04:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:04:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:04:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:04:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:04:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:04:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:04:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:04:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:04:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:04:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:04:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:04:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:04:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:04:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:04:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:04:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:04:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:04:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:04:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:04:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:04:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:04:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:04:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 23:04:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure l_malloc [2021-02-23 23:04:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2021-02-23 23:04:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:04:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:04:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:04:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:04:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:04:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:04:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:04:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:04:21,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:04:21,294 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 23:04:21,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:04:21 BoogieIcfgContainer [2021-02-23 23:04:21,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:04:21,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:04:21,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:04:21,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:04:21,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:04:19" (1/3) ... [2021-02-23 23:04:21,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db110d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:04:21, skipping insertion in model container [2021-02-23 23:04:21,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:04:20" (2/3) ... [2021-02-23 23:04:21,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db110d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:04:21, skipping insertion in model container [2021-02-23 23:04:21,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:04:21" (3/3) ... [2021-02-23 23:04:21,307 INFO L111 eAbstractionObserver]: Analyzing ICFG alt_test.i [2021-02-23 23:04:21,314 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:04:21,320 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:04:21,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:04:21,369 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:04:21,369 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:04:21,369 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:04:21,369 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:04:21,370 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:04:21,370 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:04:21,370 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:04:21,370 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:04:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-23 23:04:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:04:21,399 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:21,400 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] [2021-02-23 23:04:21,400 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -229608300, now seen corresponding path program 1 times [2021-02-23 23:04:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:21,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622848832] [2021-02-23 23:04:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:21,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:21,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:21,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:21,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 23:04:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:21,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:21,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:21,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:21,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:21,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:21,862 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 23:04:21,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622848832] [2021-02-23 23:04:21,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:21,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 23:04:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224988223] [2021-02-23 23:04:21,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 23:04:21,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 23:04:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:04:21,898 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2021-02-23 23:04:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:22,201 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-02-23 23:04:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 23:04:22,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-02-23 23:04:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:22,226 INFO L225 Difference]: With dead ends: 68 [2021-02-23 23:04:22,227 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 23:04:22,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:04:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 23:04:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 23:04:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 23:04:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 23:04:22,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-02-23 23:04:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:22,368 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 23:04:22,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 23:04:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 23:04:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 23:04:22,373 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:22,374 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] [2021-02-23 23:04:22,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:04:22,374 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash 941411187, now seen corresponding path program 1 times [2021-02-23 23:04:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:22,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407630063] [2021-02-23 23:04:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:22,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:22,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 23:04:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:04:22,550 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 23:04:22,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407630063] [2021-02-23 23:04:22,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:22,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 23:04:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704217381] [2021-02-23 23:04:22,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 23:04:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 23:04:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:04:22,554 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 5 states. [2021-02-23 23:04:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:22,711 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-02-23 23:04:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 23:04:22,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2021-02-23 23:04:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:22,714 INFO L225 Difference]: With dead ends: 45 [2021-02-23 23:04:22,714 INFO L226 Difference]: Without dead ends: 41 [2021-02-23 23:04:22,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:04:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-23 23:04:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-02-23 23:04:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-23 23:04:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-02-23 23:04:22,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 32 [2021-02-23 23:04:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:22,730 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-02-23 23:04:22,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 23:04:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-02-23 23:04:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 23:04:22,731 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:22,732 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] [2021-02-23 23:04:22,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:04:22,732 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 623439375, now seen corresponding path program 1 times [2021-02-23 23:04:22,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:22,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4069279] [2021-02-23 23:04:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:22,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:22,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:04:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 23:04:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:04:22,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:22,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:22,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:04:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 23:04:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:04:22,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:22,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:04:22,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:04:23,001 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 23:04:23,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4069279] [2021-02-23 23:04:23,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:04:23,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 23:04:23,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998037274] [2021-02-23 23:04:23,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 23:04:23,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:04:23,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 23:04:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 23:04:23,005 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 12 states. [2021-02-23 23:04:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:04:23,306 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-02-23 23:04:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 23:04:23,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2021-02-23 23:04:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:04:23,308 INFO L225 Difference]: With dead ends: 56 [2021-02-23 23:04:23,309 INFO L226 Difference]: Without dead ends: 41 [2021-02-23 23:04:23,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:04:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-23 23:04:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-02-23 23:04:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-23 23:04:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-02-23 23:04:23,320 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-02-23 23:04:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:04:23,321 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-02-23 23:04:23,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 23:04:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-02-23 23:04:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:04:23,322 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:04:23,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:04:23,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:04:23,323 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:04:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:04:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash 666606726, now seen corresponding path program 1 times [2021-02-23 23:04:23,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:04:23,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593302390] [2021-02-23 23:04:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:04:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:23,347 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:04:23,372 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:04:23,407 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:04:23,407 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:04:23,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:04:23,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:04:23 BoogieIcfgContainer [2021-02-23 23:04:23,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:04:23,483 INFO L168 Benchmark]: Toolchain (without parser) took 3853.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.1 MB in the beginning and 101.0 MB in the end (delta: 25.1 MB). Peak memory consumption was 56.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:23,484 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:04:23,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 514.45 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 103.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:23,485 INFO L168 Benchmark]: Boogie Preprocessor took 85.28 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 133.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:23,486 INFO L168 Benchmark]: RCFGBuilder took 1046.62 ms. Allocated memory is still 151.0 MB. Free memory was 133.9 MB in the beginning and 94.8 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:23,487 INFO L168 Benchmark]: TraceAbstraction took 2182.95 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 94.3 MB in the beginning and 101.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:04:23,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 514.45 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 103.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.28 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 133.9 MB in the end (delta: -30.2 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1046.62 ms. Allocated memory is still 151.0 MB. Free memory was 133.9 MB in the beginning and 94.8 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2182.95 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 94.3 MB in the beginning and 101.0 MB in the end (delta: -6.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; VAL [\old(globalState)=56, globalState=0] [L523] CALL, EXPR l_malloc(sizeof(int)) VAL [\old(globalState)=0, \old(size)=4, globalState=0] [L529] void *retVal = malloc(size); VAL [\old(globalState)=0, \old(size)=4, globalState=0, malloc(size)={-1:0}, retVal={-1:0}, size=4] [L530] COND TRUE retVal != ((void *)0) VAL [\old(globalState)=0, \old(size)=4, globalState=0, malloc(size)={-1:0}, retVal={-1:0}, size=4] [L531] globalState=1 VAL [\old(globalState)=0, \old(size)=4, globalState=1, malloc(size)={-1:0}, retVal={-1:0}, size=4] [L532] return retVal; VAL [\old(globalState)=0, \old(size)=4, \result={-1:0}, globalState=1, malloc(size)={-1:0}, retVal={-1:0}, size=4] [L523] RET, EXPR l_malloc(sizeof(int)) VAL [\old(argc)=55, \old(globalState)=0, argc=55, argv={53:52}, argv={53:52}, globalState=1, l_malloc(sizeof(int))={-1:0}] [L523] int *a = (int*) l_malloc(sizeof(int)); VAL [\old(argc)=55, \old(globalState)=0, a={-1:0}, argc=55, argv={53:52}, argv={53:52}, globalState=1, l_malloc(sizeof(int))={-1:0}] [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1, ptr={-1:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, globalState=1, ptr={-1:0}, ptr={-1:0}] [L536] globalState = 0 VAL [\old(globalState)=1, globalState=0, ptr={-1:0}, ptr={-1:0}] [L524] RET l_free(a) VAL [\old(argc)=55, \old(globalState)=0, a={-1:0}, argc=55, argv={53:52}, argv={53:52}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0, ptr={-1:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, globalState=0, ptr={-1:0}, ptr={-1:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=0, globalState=0, ptr={-1:0}, ptr={-1:0}] [L535] CALL __blast_assert () VAL [\old(globalState)=0, globalState=0] [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 63 SDslu, 260 SDs, 0 SdLazy, 291 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 9835 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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...