./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbc7a588e1092d0916f2339b4d4b9e0fa8415335 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:05:08,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:05:08,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:05:08,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:05:08,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:05:08,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:05:08,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:05:08,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:05:08,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:05:08,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:05:08,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:05:08,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:05:08,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:05:08,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:05:08,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:05:08,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:05:08,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:05:08,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:05:08,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:05:08,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:05:08,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:05:08,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:05:08,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:05:08,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:05:08,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:05:08,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:05:08,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:05:08,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:05:08,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:05:08,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:05:08,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:05:08,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:05:08,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:05:08,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:05:08,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:05:08,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:05:08,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:05:08,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:05:08,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:05:08,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:05:08,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:05:08,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:05:08,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:05:08,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:05:08,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:05:08,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:05:08,435 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:05:08,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:05:08,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:05:08,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:05:08,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:05:08,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:05:08,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:05:08,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:05:08,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:05:08,439 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:05:08,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:05:08,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:05:08,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:05:08,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:05:08,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:05:08,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:05:08,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:05:08,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:05:08,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:05:08,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:05:08,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:05:08,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:05:08,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:05:08,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:05:08,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2020-10-19 18:05:08,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:05:08,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:05:08,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:05:08,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:05:08,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:05:08,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-10-19 18:05:08,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d486eba1b/89d956035db34645ba92b90505c45eeb/FLAG599e456b0 [2020-10-19 18:05:09,327 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:05:09,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-10-19 18:05:09,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d486eba1b/89d956035db34645ba92b90505c45eeb/FLAG599e456b0 [2020-10-19 18:05:09,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d486eba1b/89d956035db34645ba92b90505c45eeb [2020-10-19 18:05:09,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:05:09,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:05:09,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:05:09,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:05:09,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:05:09,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:05:09" (1/1) ... [2020-10-19 18:05:09,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b01165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:09, skipping insertion in model container [2020-10-19 18:05:09,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:05:09" (1/1) ... [2020-10-19 18:05:09,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:05:09,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:05:10,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:05:10,107 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:05:10,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:05:10,212 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:05:10,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10 WrapperNode [2020-10-19 18:05:10,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:05:10,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:05:10,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:05:10,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:05:10,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (1/1) ... [2020-10-19 18:05:10,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:05:10,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:05:10,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:05:10,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:05:10,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (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 [2020-10-19 18:05:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:05:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:05:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:05:10,336 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-19 18:05:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:05:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:05:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:05:10,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:05:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:05:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:05:10,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:05:10,344 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:05:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:05:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:05:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:05:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:05:10,345 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:05:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:05:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:05:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:05:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:05:10,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:05:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:05:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:05:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:05:10,347 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:05:10,348 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:05:10,349 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:05:10,350 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:05:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:05:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:05:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:05:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:05:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:05:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:05:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:05:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:05:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:05:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:05:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:05:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:05:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:05:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:05:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:05:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:05:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:05:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:05:10,358 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:05:10,359 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:05:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:05:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:05:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:05:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:05:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-19 18:05:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:05:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:05:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:05:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:05:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:05:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:05:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:05:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:05:10,877 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:05:10,878 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:05:10,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:05:10 BoogieIcfgContainer [2020-10-19 18:05:10,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:05:10,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:05:10,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:05:10,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:05:10,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:05:09" (1/3) ... [2020-10-19 18:05:10,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd99951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:05:10, skipping insertion in model container [2020-10-19 18:05:10,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:05:10" (2/3) ... [2020-10-19 18:05:10,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd99951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:05:10, skipping insertion in model container [2020-10-19 18:05:10,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:05:10" (3/3) ... [2020-10-19 18:05:10,890 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2020-10-19 18:05:10,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:05:10,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-19 18:05:10,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-19 18:05:10,946 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:05:10,947 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:05:10,947 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:05:10,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:05:10,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:05:10,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:05:10,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:05:10,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:05:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-10-19 18:05:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:05:10,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:10,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:10,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -334073084, now seen corresponding path program 1 times [2020-10-19 18:05:10,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:10,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563502963] [2020-10-19 18:05:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:11,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563502963] [2020-10-19 18:05:11,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:11,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:05:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380846116] [2020-10-19 18:05:11,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:05:11,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:05:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:05:11,256 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-10-19 18:05:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:11,410 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-19 18:05:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:05:11,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:05:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:11,422 INFO L225 Difference]: With dead ends: 62 [2020-10-19 18:05:11,422 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 18:05:11,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:05:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 18:05:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-19 18:05:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 18:05:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-19 18:05:11,466 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-10-19 18:05:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:11,467 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-19 18:05:11,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:05:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-19 18:05:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:05:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:11,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:11,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:05:11,469 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545344, now seen corresponding path program 1 times [2020-10-19 18:05:11,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:11,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102077972] [2020-10-19 18:05:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102077972] [2020-10-19 18:05:11,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:11,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:05:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045989227] [2020-10-19 18:05:11,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:05:11,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:05:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:05:11,644 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-10-19 18:05:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:11,819 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-19 18:05:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:05:11,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:05:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:11,821 INFO L225 Difference]: With dead ends: 58 [2020-10-19 18:05:11,822 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 18:05:11,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:05:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 18:05:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-19 18:05:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 18:05:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-19 18:05:11,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 10 [2020-10-19 18:05:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:11,837 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-19 18:05:11,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:05:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-19 18:05:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:05:11,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:11,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:11,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:05:11,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545343, now seen corresponding path program 1 times [2020-10-19 18:05:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:11,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742381158] [2020-10-19 18:05:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742381158] [2020-10-19 18:05:11,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:11,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:05:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106024762] [2020-10-19 18:05:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:05:11,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:05:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:05:11,991 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2020-10-19 18:05:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:12,220 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-19 18:05:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:05:12,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 18:05:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:12,223 INFO L225 Difference]: With dead ends: 109 [2020-10-19 18:05:12,223 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 18:05:12,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:05:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 18:05:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-19 18:05:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 18:05:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-19 18:05:12,234 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2020-10-19 18:05:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:12,234 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-19 18:05:12,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:05:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-19 18:05:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:05:12,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:12,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:12,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:05:12,236 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:12,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421434, now seen corresponding path program 1 times [2020-10-19 18:05:12,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:12,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515319345] [2020-10-19 18:05:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:12,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:12,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515319345] [2020-10-19 18:05:12,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692973592] [2020-10-19 18:05:12,368 INFO L95 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 [2020-10-19 18:05:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:05:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:12,617 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-19 18:05:12,618 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-10-19 18:05:12,619 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:05:12,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:05:12,646 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:05:12,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2020-10-19 18:05:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:12,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:05:12,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-10-19 18:05:12,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152185153] [2020-10-19 18:05:12,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:05:12,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:12,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:05:12,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:05:12,709 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2020-10-19 18:05:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:12,809 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-19 18:05:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:05:12,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-19 18:05:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:12,811 INFO L225 Difference]: With dead ends: 108 [2020-10-19 18:05:12,811 INFO L226 Difference]: Without dead ends: 108 [2020-10-19 18:05:12,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:05:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-19 18:05:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2020-10-19 18:05:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 18:05:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-19 18:05:12,818 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2020-10-19 18:05:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:12,819 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-19 18:05:12,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:05:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-19 18:05:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:05:12,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:12,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:13,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:13,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184100, now seen corresponding path program 1 times [2020-10-19 18:05:13,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:13,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810329708] [2020-10-19 18:05:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:13,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810329708] [2020-10-19 18:05:13,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:13,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:05:13,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998070906] [2020-10-19 18:05:13,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:05:13,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:13,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:05:13,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:05:13,114 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-10-19 18:05:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:13,253 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-19 18:05:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:05:13,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-19 18:05:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:13,254 INFO L225 Difference]: With dead ends: 54 [2020-10-19 18:05:13,254 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 18:05:13,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:05:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 18:05:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-19 18:05:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:05:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-19 18:05:13,260 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2020-10-19 18:05:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:13,261 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-19 18:05:13,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:05:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-19 18:05:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:05:13,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:13,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:13,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:05:13,262 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184099, now seen corresponding path program 1 times [2020-10-19 18:05:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:13,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501398997] [2020-10-19 18:05:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:13,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501398997] [2020-10-19 18:05:13,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:13,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:05:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305113946] [2020-10-19 18:05:13,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:05:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:13,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:05:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:05:13,359 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2020-10-19 18:05:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:13,704 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-19 18:05:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:05:13,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-19 18:05:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:13,706 INFO L225 Difference]: With dead ends: 99 [2020-10-19 18:05:13,706 INFO L226 Difference]: Without dead ends: 99 [2020-10-19 18:05:13,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:05:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-19 18:05:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-10-19 18:05:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-19 18:05:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-19 18:05:13,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2020-10-19 18:05:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:13,715 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-19 18:05:13,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:05:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-19 18:05:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:05:13,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:13,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:13,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:05:13,717 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 139066936, now seen corresponding path program 1 times [2020-10-19 18:05:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:13,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041705410] [2020-10-19 18:05:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041705410] [2020-10-19 18:05:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485216319] [2020-10-19 18:05:13,813 INFO L95 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 [2020-10-19 18:05:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 18:05:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:13,940 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-19 18:05:13,941 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-10-19 18:05:13,941 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:05:13,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:05:13,955 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:05:13,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-10-19 18:05:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:05:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-19 18:05:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6186356] [2020-10-19 18:05:14,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:05:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:05:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:05:14,021 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-10-19 18:05:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:14,171 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-10-19 18:05:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:05:14,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-19 18:05:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:14,173 INFO L225 Difference]: With dead ends: 104 [2020-10-19 18:05:14,173 INFO L226 Difference]: Without dead ends: 104 [2020-10-19 18:05:14,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:05:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-19 18:05:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-10-19 18:05:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-19 18:05:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-19 18:05:14,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2020-10-19 18:05:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:14,181 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-19 18:05:14,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:05:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-19 18:05:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:05:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:14,182 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:14,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:14,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2134408578, now seen corresponding path program 1 times [2020-10-19 18:05:14,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:14,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660272986] [2020-10-19 18:05:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:14,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:14,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660272986] [2020-10-19 18:05:14,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186978991] [2020-10-19 18:05:14,455 INFO L95 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 [2020-10-19 18:05:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:05:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:14,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:05:14,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-19 18:05:14,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823861480] [2020-10-19 18:05:14,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:05:14,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:05:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:05:14,597 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 5 states. [2020-10-19 18:05:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:14,639 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-10-19 18:05:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:05:14,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-19 18:05:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:14,640 INFO L225 Difference]: With dead ends: 97 [2020-10-19 18:05:14,641 INFO L226 Difference]: Without dead ends: 97 [2020-10-19 18:05:14,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:05:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-19 18:05:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-19 18:05:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 18:05:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-19 18:05:14,646 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2020-10-19 18:05:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:14,647 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-19 18:05:14,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:05:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-19 18:05:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:05:14,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:14,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:14,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:14,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1700324605, now seen corresponding path program 1 times [2020-10-19 18:05:14,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:14,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251755701] [2020-10-19 18:05:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:14,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251755701] [2020-10-19 18:05:14,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851981512] [2020-10-19 18:05:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 18:05:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 18:05:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:15,127 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-19 18:05:15,127 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-10-19 18:05:15,128 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:05:15,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:05:15,147 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:05:15,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-10-19 18:05:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:15,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:05:15,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-19 18:05:15,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240363078] [2020-10-19 18:05:15,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:05:15,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:05:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:05:15,250 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2020-10-19 18:05:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:15,813 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-19 18:05:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:05:15,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-19 18:05:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:15,817 INFO L225 Difference]: With dead ends: 112 [2020-10-19 18:05:15,817 INFO L226 Difference]: Without dead ends: 112 [2020-10-19 18:05:15,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-19 18:05:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-19 18:05:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-10-19 18:05:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-19 18:05:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-19 18:05:15,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2020-10-19 18:05:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:15,824 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-19 18:05:15,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:05:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-19 18:05:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:05:15,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:15,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:16,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:16,040 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -247582013, now seen corresponding path program 1 times [2020-10-19 18:05:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:16,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574528598] [2020-10-19 18:05:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-19 18:05:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:05:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574528598] [2020-10-19 18:05:16,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:16,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:05:16,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884033287] [2020-10-19 18:05:16,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:05:16,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:05:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:05:16,125 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-10-19 18:05:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:16,390 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-19 18:05:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:05:16,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-19 18:05:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:16,392 INFO L225 Difference]: With dead ends: 71 [2020-10-19 18:05:16,392 INFO L226 Difference]: Without dead ends: 71 [2020-10-19 18:05:16,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:05:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-19 18:05:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-19 18:05:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-19 18:05:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-19 18:05:16,396 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2020-10-19 18:05:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:16,397 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-19 18:05:16,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:05:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-19 18:05:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:05:16,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:16,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:16,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:05:16,398 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash -247582012, now seen corresponding path program 1 times [2020-10-19 18:05:16,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:16,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094370754] [2020-10-19 18:05:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-19 18:05:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:05:16,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094370754] [2020-10-19 18:05:16,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:16,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:05:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286730996] [2020-10-19 18:05:16,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:05:16,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:05:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:05:16,477 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 6 states. [2020-10-19 18:05:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:16,758 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-19 18:05:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:05:16,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-19 18:05:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:16,760 INFO L225 Difference]: With dead ends: 74 [2020-10-19 18:05:16,760 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 18:05:16,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:05:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 18:05:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-19 18:05:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 18:05:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-19 18:05:16,764 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2020-10-19 18:05:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:16,764 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-19 18:05:16,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:05:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-19 18:05:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:05:16,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:16,766 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:16,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:05:16,766 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash 474007128, now seen corresponding path program 2 times [2020-10-19 18:05:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:16,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743133306] [2020-10-19 18:05:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:05:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743133306] [2020-10-19 18:05:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108890446] [2020-10-19 18:05:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-19 18:05:16,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:05:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:05:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 18:05:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:16,977 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-19 18:05:16,978 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-10-19 18:05:16,978 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:05:16,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:05:16,984 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:05:16,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-10-19 18:05:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:05:17,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:05:17,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2020-10-19 18:05:17,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483321498] [2020-10-19 18:05:17,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:05:17,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:05:17,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:05:17,104 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 13 states. [2020-10-19 18:05:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:18,444 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-19 18:05:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-19 18:05:18,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-19 18:05:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:18,446 INFO L225 Difference]: With dead ends: 120 [2020-10-19 18:05:18,446 INFO L226 Difference]: Without dead ends: 120 [2020-10-19 18:05:18,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-19 18:05:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-19 18:05:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2020-10-19 18:05:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-19 18:05:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-19 18:05:18,453 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 23 [2020-10-19 18:05:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:18,454 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-19 18:05:18,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:05:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-19 18:05:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:05:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:18,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:18,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 18:05:18,667 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1256876169, now seen corresponding path program 1 times [2020-10-19 18:05:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:18,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176948642] [2020-10-19 18:05:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:18,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-19 18:05:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:05:18,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176948642] [2020-10-19 18:05:18,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:05:18,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:05:18,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625229498] [2020-10-19 18:05:18,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:05:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:05:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:05:18,731 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-10-19 18:05:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:18,930 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-19 18:05:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:05:18,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-19 18:05:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:18,933 INFO L225 Difference]: With dead ends: 78 [2020-10-19 18:05:18,933 INFO L226 Difference]: Without dead ends: 78 [2020-10-19 18:05:18,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:05:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-19 18:05:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-19 18:05:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:05:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-19 18:05:18,937 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 25 [2020-10-19 18:05:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:18,938 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-19 18:05:18,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:05:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-19 18:05:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:05:18,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:18,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:18,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:05:18,940 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:18,940 INFO L82 PathProgramCache]: Analyzing trace with hash 254265955, now seen corresponding path program 1 times [2020-10-19 18:05:18,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:18,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792578376] [2020-10-19 18:05:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:19,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:05:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 18:05:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792578376] [2020-10-19 18:05:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228304741] [2020-10-19 18:05:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:05:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 18:05:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:05:19,186 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-19 18:05:19,187 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-10-19 18:05:19,187 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:05:19,198 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:05:19,201 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:05:19,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-10-19 18:05:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 18:05:19,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:05:19,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-10-19 18:05:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186037524] [2020-10-19 18:05:19,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:05:19,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:05:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:05:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:05:19,318 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 7 states. [2020-10-19 18:05:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:05:19,490 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-19 18:05:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:05:19,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-19 18:05:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:05:19,492 INFO L225 Difference]: With dead ends: 90 [2020-10-19 18:05:19,492 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 18:05:19,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:05:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 18:05:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-19 18:05:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-19 18:05:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-19 18:05:19,500 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 25 [2020-10-19 18:05:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:05:19,500 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-19 18:05:19,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:05:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-19 18:05:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:05:19,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:05:19,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:05:19,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:05:19,714 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:05:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:05:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -972185287, now seen corresponding path program 1 times [2020-10-19 18:05:19,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:05:19,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592296782] [2020-10-19 18:05:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:05:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:05:19,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:05:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:05:19,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:05:19,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:05:19,773 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:05:19,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:05:19,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:05:19 BoogieIcfgContainer [2020-10-19 18:05:19,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:05:19,840 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:05:19,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:05:19,841 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:05:19,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:05:10" (3/4) ... [2020-10-19 18:05:19,843 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:05:19,905 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:05:19,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:05:19,907 INFO L168 Benchmark]: Toolchain (without parser) took 10244.59 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 331.4 MB). Free memory was 960.0 MB in the beginning and 1.3 GB in the end (delta: -313.7 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:05:19,908 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:05:19,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:05:19,915 INFO L168 Benchmark]: Boogie Preprocessor took 62.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:05:19,916 INFO L168 Benchmark]: RCFGBuilder took 603.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:05:19,917 INFO L168 Benchmark]: TraceAbstraction took 8958.36 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -221.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:05:19,917 INFO L168 Benchmark]: Witness Printer took 65.34 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:05:19,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 543.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 603.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8958.36 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -221.7 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 65.34 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=56, \old(a)=53, \old(b)=57, \old(b)=50, \old(n)=55, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] b[-1] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b[-1]=0, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L547] free(a) [L547] free(b) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 1231 SDslu, 955 SDs, 0 SdLazy, 1689 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 288 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 385 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 44965 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1011 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 12 PerfectInterpolantSequences, 34/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...