/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:16:26,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:16:26,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:16:26,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:16:26,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:16:26,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:16:26,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:16:26,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:16:26,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:16:26,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:16:26,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:16:26,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:16:26,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:16:26,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:16:26,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:16:26,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:16:26,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:16:26,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:16:26,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:16:26,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:16:26,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:16:26,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:16:26,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:16:26,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:16:26,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:16:26,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:16:26,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:16:26,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:16:26,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:16:26,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:16:26,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:16:26,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:16:26,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:16:26,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:16:26,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:16:26,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:16:26,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:16:26,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:16:26,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:16:26,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:16:26,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:16:26,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:16:26,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:16:26,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:16:26,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:16:26,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:16:26,438 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:16:26,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:16:26,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:16:26,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:16:26,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:16:26,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:16:26,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:16:26,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:16:26,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:16:26,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:16:26,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:16:26,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:16:26,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:16:26,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:16:26,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:16:26,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:16:26,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:16:26,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:16:26,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:16:26,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:16:26,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:16:26,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:16:26,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:16:26,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:16:26,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:16:26,725 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:16:26,726 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-07 11:16:26,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb1947d2/5a53d1c81427400f8fa94db1ce600e97/FLAG1023f7946 [2020-07-07 11:16:27,345 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:16:27,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-07 11:16:27,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb1947d2/5a53d1c81427400f8fa94db1ce600e97/FLAG1023f7946 [2020-07-07 11:16:27,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb1947d2/5a53d1c81427400f8fa94db1ce600e97 [2020-07-07 11:16:27,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:16:27,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:16:27,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:27,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:16:27,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:16:27,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:27" (1/1) ... [2020-07-07 11:16:27,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1087fc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:27, skipping insertion in model container [2020-07-07 11:16:27,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:27" (1/1) ... [2020-07-07 11:16:27,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:16:27,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:16:28,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:28,134 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:16:28,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:28,231 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:16:28,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28 WrapperNode [2020-07-07 11:16:28,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:28,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:16:28,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:16:28,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:16:28,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (1/1) ... [2020-07-07 11:16:28,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:16:28,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:16:28,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:16:28,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:16:28,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (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 [2020-07-07 11:16:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:16:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:16:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:16:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-07 11:16:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-07 11:16:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-07 11:16:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-07 11:16:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-07 11:16:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-07 11:16:28,379 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-07 11:16:28,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:16:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:16:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:16:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-07 11:16:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-07 11:16:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-07 11:16:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-07 11:16:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-07 11:16:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-07 11:16:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-07 11:16:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-07 11:16:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-07 11:16:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-07 11:16:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-07 11:16:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-07 11:16:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-07 11:16:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-07 11:16:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-07 11:16:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-07 11:16:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-07 11:16:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-07 11:16:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-07 11:16:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-07 11:16:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-07 11:16:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-07 11:16:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-07 11:16:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-07 11:16:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-07 11:16:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-07 11:16:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-07 11:16:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-07 11:16:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-07 11:16:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-07 11:16:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-07 11:16:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-07 11:16:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-07 11:16:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-07 11:16:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-07 11:16:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-07 11:16:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:16:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:16:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-07 11:16:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:16:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-07 11:16:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-07 11:16:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-07 11:16:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-07 11:16:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-07 11:16:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-07 11:16:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-07 11:16:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-07 11:16:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-07 11:16:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-07 11:16:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-07 11:16:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-07 11:16:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-07 11:16:28,400 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-07 11:16:28,400 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-07 11:16:28,400 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-07 11:16:28,400 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-07 11:16:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-07 11:16:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-07 11:16:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-07 11:16:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-07 11:16:28,401 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-07 11:16:28,402 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-07 11:16:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-07 11:16:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-07 11:16:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-07 11:16:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-07 11:16:28,403 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-07 11:16:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-07 11:16:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-07 11:16:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-07 11:16:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-07 11:16:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:16:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:16:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:16:28,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:16:28,896 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:16:28,896 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:16:28,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:28 BoogieIcfgContainer [2020-07-07 11:16:28,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:16:28,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:16:28,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:16:28,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:16:28,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:16:27" (1/3) ... [2020-07-07 11:16:28,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1514c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:28, skipping insertion in model container [2020-07-07 11:16:28,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:28" (2/3) ... [2020-07-07 11:16:28,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1514c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:28, skipping insertion in model container [2020-07-07 11:16:28,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:28" (3/3) ... [2020-07-07 11:16:28,907 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-07 11:16:28,917 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:16:28,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:16:28,937 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:16:28,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:16:28,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:16:28,956 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:16:28,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:16:28,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:16:28,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:16:28,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:16:28,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:16:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-07 11:16:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-07 11:16:28,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:28,982 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:28,982 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-07 11:16:28,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:28,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698458744] [2020-07-07 11:16:28,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:16:29,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698458744] [2020-07-07 11:16:29,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726204630] [2020-07-07 11:16:29,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:29,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-07 11:16:29,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 11:16:29,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:16:29,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2020-07-07 11:16:29,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696749255] [2020-07-07 11:16:29,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:16:29,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:16:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:29,789 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-07-07 11:16:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:29,818 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-07 11:16:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:16:29,819 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2020-07-07 11:16:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:29,828 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:16:29,829 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:16:29,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:16:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:16:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:16:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-07 11:16:29,875 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 45 [2020-07-07 11:16:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-07 11:16:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:16:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-07 11:16:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 11:16:29,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:29,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:30,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 11:16:30,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1842115760, now seen corresponding path program 1 times [2020-07-07 11:16:30,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:30,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725646391] [2020-07-07 11:16:30,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:16:30,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725646391] [2020-07-07 11:16:30,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875136183] [2020-07-07 11:16:30,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:30,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:16:30,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:16:30,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:30,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-07-07 11:16:30,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282860158] [2020-07-07 11:16:30,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:16:30,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:16:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:30,435 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-07-07 11:16:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:30,782 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2020-07-07 11:16:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:16:30,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-07-07 11:16:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:30,784 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:16:30,784 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:16:30,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:16:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:16:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-07 11:16:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 11:16:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-07 11:16:30,798 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 47 [2020-07-07 11:16:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:30,798 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-07 11:16:30,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:16:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-07 11:16:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 11:16:30,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:30,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:31,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:31,016 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:31,016 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-07 11:16:31,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:31,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245562813] [2020-07-07 11:16:31,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:16:31,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245562813] [2020-07-07 11:16:31,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:31,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 11:16:31,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335740108] [2020-07-07 11:16:31,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:16:31,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:16:31,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:16:31,358 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 12 states. [2020-07-07 11:16:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:31,911 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-07-07 11:16:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:16:31,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-07-07 11:16:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:31,915 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:16:31,915 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 11:16:31,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:16:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 11:16:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-07-07 11:16:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:16:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-07 11:16:31,925 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-07 11:16:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:31,925 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-07 11:16:31,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:16:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-07 11:16:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 11:16:31,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:31,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:31,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:16:31,927 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-07 11:16:31,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:31,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984112954] [2020-07-07 11:16:31,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:16:32,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984112954] [2020-07-07 11:16:32,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:32,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 11:16:32,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202612639] [2020-07-07 11:16:32,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:16:32,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:16:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:16:32,066 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-07-07 11:16:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:32,374 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-07 11:16:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:16:32,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-07 11:16:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:32,377 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:16:32,379 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:16:32,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:16:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:16:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-07 11:16:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:16:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-07 11:16:32,388 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-07 11:16:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:32,388 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-07 11:16:32,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:16:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-07 11:16:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 11:16:32,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:32,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:32,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:16:32,391 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-07 11:16:32,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:32,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702895677] [2020-07-07 11:16:32,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-07 11:16:33,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702895677] [2020-07-07 11:16:33,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893456791] [2020-07-07 11:16:33,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:33,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-07 11:16:33,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:33,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:33,246 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,254 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:33,255 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:33,301 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-07 11:16:33,301 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-07 11:16:33,302 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,307 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:33,307 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:13 [2020-07-07 11:16:33,484 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:33,484 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,494 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:33,498 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:33,499 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:33,509 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:33,510 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:33,510 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:54, output treesize:46 [2020-07-07 11:16:34,770 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-07 11:16:35,775 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-07 11:16:35,812 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:35,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2020-07-07 11:16:35,815 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:35,830 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:35,840 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-07 11:16:35,840 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:35,852 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:35,853 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:35,854 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2020-07-07 11:16:36,110 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2020-07-07 11:16:36,111 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:36,121 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:36,125 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-07-07 11:16:36,126 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:36,136 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:36,137 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:36,137 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:48, output treesize:7 [2020-07-07 11:16:36,141 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:36,142 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:36,144 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:36,144 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:36,144 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-07 11:16:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:16:36,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:36,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2020-07-07 11:16:36,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629514376] [2020-07-07 11:16:36,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 11:16:36,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 11:16:36,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1105, Unknown=1, NotChecked=0, Total=1190 [2020-07-07 11:16:36,234 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 35 states. [2020-07-07 11:16:38,273 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-07-07 11:16:42,029 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-07-07 11:16:43,736 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-07-07 11:16:45,842 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-07-07 11:16:49,744 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-07-07 11:16:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:50,911 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-07-07 11:16:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:16:50,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2020-07-07 11:16:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:50,915 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:16:50,915 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:16:50,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=263, Invalid=2492, Unknown=1, NotChecked=0, Total=2756 [2020-07-07 11:16:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:16:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-07 11:16:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 11:16:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-07 11:16:50,925 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 50 [2020-07-07 11:16:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:50,926 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-07 11:16:50,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 11:16:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-07 11:16:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-07 11:16:50,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:50,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:51,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:51,141 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-07 11:16:51,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:51,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525311210] [2020-07-07 11:16:51,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:16:52,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525311210] [2020-07-07 11:16:52,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687753122] [2020-07-07 11:16:52,951 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:53,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:16:53,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:16:53,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 113 conjunts are in the unsatisfiable core [2020-07-07 11:16:53,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:53,180 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-07 11:16:53,181 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,185 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:53,185 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-07 11:16:53,247 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-07 11:16:53,247 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2020-07-07 11:16:53,248 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,253 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:53,254 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,254 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2020-07-07 11:16:53,534 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:53,534 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,547 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:53,551 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:16:53,551 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:53,563 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:53,564 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:53,564 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:52 [2020-07-07 11:16:54,316 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-07 11:16:55,072 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-07 11:16:55,106 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,106 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 69 [2020-07-07 11:16:55,108 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:55,138 INFO L624 ElimStorePlain]: treesize reduction 32, result has 68.0 percent of original size [2020-07-07 11:16:55,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:16:55,147 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-07 11:16:55,148 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:55,159 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,160 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:55,160 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:46 [2020-07-07 11:16:55,432 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:55,464 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,468 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:55,490 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,494 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:55,516 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,520 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:55,533 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:55,534 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-07 11:16:55,535 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:63 [2020-07-07 11:17:08,002 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-07 11:17:11,779 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-07 11:17:11,842 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:11,842 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2020-07-07 11:17:11,843 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:17:11,865 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:17:11,875 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2020-07-07 11:17:11,876 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:17:11,903 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:17:11,910 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2020-07-07 11:17:11,911 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-07 11:17:11,931 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:17:11,940 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2020-07-07 11:17:11,941 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-07 11:17:11,979 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:11,981 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:17:11,982 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:108, output treesize:107 [2020-07-07 11:17:12,400 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:17:12,402 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:17:12,558 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:17:12,822 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:17:12,823 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 84 [2020-07-07 11:17:12,825 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:17:12,826 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-07 11:17:12,827 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:17:12,832 INFO L624 ElimStorePlain]: treesize reduction 77, result has 1.3 percent of original size [2020-07-07 11:17:12,832 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-07 11:17:12,832 INFO L512 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2020-07-07 11:17:12,833 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:17:12,833 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:139, output treesize:1 [2020-07-07 11:17:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:17:12,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:17:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2020-07-07 11:17:12,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849586571] [2020-07-07 11:17:12,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-07 11:17:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:17:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-07 11:17:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2115, Unknown=5, NotChecked=0, Total=2256 [2020-07-07 11:17:12,858 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 48 states. [2020-07-07 11:17:23,404 WARN L193 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-07-07 11:17:33,309 WARN L193 SmtUtils]: Spent 9.68 s on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2020-07-07 11:17:42,056 WARN L193 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-07-07 11:17:55,001 WARN L193 SmtUtils]: Spent 10.35 s on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-07-07 11:18:04,564 WARN L193 SmtUtils]: Spent 9.46 s on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2020-07-07 11:18:05,024 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-07-07 11:18:05,705 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-07-07 11:18:06,007 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-07-07 11:18:06,238 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-07-07 11:18:06,562 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-07-07 11:18:06,889 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2020-07-07 11:18:07,204 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-07-07 11:18:07,560 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-07-07 11:18:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:07,801 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-07-07 11:18:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:18:07,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2020-07-07 11:18:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:07,803 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:18:07,803 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 11:18:07,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=458, Invalid=4507, Unknown=5, NotChecked=0, Total=4970 [2020-07-07 11:18:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 11:18:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-07 11:18:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:18:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-07-07 11:18:07,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 53 [2020-07-07 11:18:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:07,816 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-07-07 11:18:07,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-07 11:18:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-07-07 11:18:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-07 11:18:07,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:07,817 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:08,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:08,023 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 1 times [2020-07-07 11:18:08,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:08,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347518499] [2020-07-07 11:18:08,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:18:08,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347518499] [2020-07-07 11:18:08,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088272550] [2020-07-07 11:18:08,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:09,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-07 11:18:09,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:09,328 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:18:09,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:18:09,350 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,356 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:18:09,357 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,382 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:18:09,383 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-07 11:18:09,384 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:23 [2020-07-07 11:18:09,697 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_26|], 2=[|v_#memory_$Pointer$.base_27|, |v_#memory_$Pointer$.base_29|]} [2020-07-07 11:18:09,709 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:18:09,709 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,717 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-07 11:18:09,718 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,770 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:18:09,773 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:18:09,776 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:18:09,822 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:18:09,825 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,828 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:09,859 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:18:09,860 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-07 11:18:09,860 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:129, output treesize:67 [2020-07-07 11:18:12,600 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-07 11:18:14,921 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-07 11:18:14,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:18:14,941 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-07 11:18:14,950 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:18:14,951 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 44 [2020-07-07 11:18:14,951 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:18:14,952 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:18:14,985 INFO L624 ElimStorePlain]: treesize reduction 16, result has 71.9 percent of original size [2020-07-07 11:18:14,986 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:18:14,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-07-07 11:18:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:18:15,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:15,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2020-07-07 11:18:15,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158200658] [2020-07-07 11:18:15,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 11:18:15,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:15,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 11:18:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1194, Unknown=1, NotChecked=0, Total=1332 [2020-07-07 11:18:15,324 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 37 states. [2020-07-07 11:18:17,454 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-07-07 11:18:21,927 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-07-07 11:18:24,026 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-07-07 11:18:27,146 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-07-07 11:18:33,131 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-07-07 11:18:43,051 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-07-07 11:19:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:05,301 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-07-07 11:19:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 11:19:05,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 53 [2020-07-07 11:19:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:05,303 INFO L225 Difference]: With dead ends: 85 [2020-07-07 11:19:05,303 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:19:05,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=566, Invalid=3339, Unknown=1, NotChecked=0, Total=3906 [2020-07-07 11:19:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:19:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-07-07 11:19:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 11:19:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-07-07 11:19:05,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 53 [2020-07-07 11:19:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:05,316 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-07-07 11:19:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 11:19:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-07-07 11:19:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 11:19:05,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:05,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:05,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:19:05,531 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-07 11:19:05,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:05,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061947946] [2020-07-07 11:19:05,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:05,634 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:19:05,634 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:19:05,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:19:05,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:19:05 BoogieIcfgContainer [2020-07-07 11:19:05,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:19:05,691 INFO L168 Benchmark]: Toolchain (without parser) took 158021.69 ms. Allocated memory was 135.8 MB in the beginning and 396.4 MB in the end (delta: 260.6 MB). Free memory was 98.7 MB in the beginning and 233.9 MB in the end (delta: -135.2 MB). Peak memory consumption was 125.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:05,691 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:19:05,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 560.96 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 98.3 MB in the beginning and 163.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:05,693 INFO L168 Benchmark]: Boogie Preprocessor took 69.51 ms. Allocated memory is still 199.8 MB. Free memory was 163.4 MB in the beginning and 160.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:05,693 INFO L168 Benchmark]: RCFGBuilder took 597.43 ms. Allocated memory is still 199.8 MB. Free memory was 160.2 MB in the beginning and 115.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:05,694 INFO L168 Benchmark]: TraceAbstraction took 156789.16 ms. Allocated memory was 199.8 MB in the beginning and 396.4 MB in the end (delta: 196.6 MB). Free memory was 114.3 MB in the beginning and 233.9 MB in the end (delta: -119.5 MB). Peak memory consumption was 77.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:05,696 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 560.96 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 98.3 MB in the beginning and 163.4 MB in the end (delta: -65.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.51 ms. Allocated memory is still 199.8 MB. Free memory was 163.4 MB in the beginning and 160.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.43 ms. Allocated memory is still 199.8 MB. Free memory was 160.2 MB in the beginning and 115.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 156789.16 ms. Allocated memory was 199.8 MB in the beginning and 396.4 MB in the end (delta: 196.6 MB). Free memory was 114.3 MB in the beginning and 233.9 MB in the end (delta: -119.5 MB). Peak memory consumption was 77.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=16, \old(head)=32, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={25:26}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={25:26}, malloc(sizeof(mlist))={-1:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={25:26}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-1:0}, k=2, l={-1:0}, l={25:26}, malloc(sizeof(mlist))={-1:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,2)=0, mylist={25:26}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, l={25:26}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, k=5, l={-5:0}, l={25:26}, malloc(sizeof(mlist))={-5:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={25:26}, l={-5:0}, malloc(sizeof(mlist))={-5:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-1, \old(head)=0, \old(k)=5, \result=0, head={-5:0}, k=5, l={25:26}, l={-5:0}, malloc(sizeof(mlist))={-5:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-5:0}, insert_list(mylist,5)=0, mylist={25:26}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-5, \old(k)=1, head={-5:0}, l={25:26}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-5, \old(head)=0, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={25:26}, malloc(sizeof(mlist))={-3:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-5, \old(head)=0, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={25:26}, malloc(sizeof(mlist))={-3:0}] [L539] head = l [L540] return 0; VAL [\old(head)=-5, \old(head)=0, \old(k)=1, \result=0, head={-3:0}, k=1, l={-3:0}, l={25:26}, malloc(sizeof(mlist))={-3:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={-3:0}, insert_list(mylist,1)=0, mylist={25:26}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=-3, \old(k)=3, head={-3:0}, l={25:26}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-3, \old(head)=0, \old(k)=3, head={-3:0}, k=3, l={25:26}, l={-4:0}, malloc(sizeof(mlist))={-4:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-3, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={25:26}, malloc(sizeof(mlist))={-4:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-3, \old(k)=3, \result=0, head={-4:0}, k=3, l={25:26}, l={-4:0}, malloc(sizeof(mlist))={-4:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-4:0}, insert_list(mylist,3)=0, mylist={25:26}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, l={-4:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-3:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-5:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-4:0}, k=2, l={-1:0}, l={-4:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={-1:0}, head={-4:0}, k=2, l={-1:0}, l={-4:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-4:0}, mylist={25:26}, search_list(head,2)={-1:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-4:0}, mylist={25:26}, temp={-1:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-4:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-4:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 156.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 120.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 638 SDslu, 822 SDs, 0 SdLazy, 3286 SolverSat, 450 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 35.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 512 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 115.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=7, 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, 7 MinimizatonAttempts, 26 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 33.2s InterpolantComputationTime, 646 NumberOfCodeBlocks, 646 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 578 ConstructedInterpolants, 12 QuantifiedInterpolants, 424870 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1698 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 266/402 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...