./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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_1-1.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 978f701fee046cd9a3f43bfb12d114d1876d2f10 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 05:57:53,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:57:53,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:57:53,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:57:53,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:57:53,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:57:53,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:57:53,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:57:53,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:57:53,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:57:53,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:57:53,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:57:53,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:57:53,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:57:53,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:57:53,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:57:53,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:57:53,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:57:53,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:57:53,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:57:53,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:57:53,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:57:53,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:57:53,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:57:53,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:57:53,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:57:53,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:57:53,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:57:53,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:57:53,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:57:53,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:57:53,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:57:53,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:57:53,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:57:53,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:57:53,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:57:53,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:57:53,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:57:53,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:57:53,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:57:53,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:57:53,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:57:53,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:57:53,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:57:53,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:57:53,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:57:53,729 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:57:53,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:57:53,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:57:53,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:57:53,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:57:53,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:57:53,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:57:53,732 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:57:53,732 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:57:53,733 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:57:53,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:57:53,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:57:53,734 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:57:53,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:57:53,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:57:53,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:57:53,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:57:53,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:57:53,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:57:53,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:57:53,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:57:53,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:57:53,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:57:53,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:57:53,737 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 -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2020-10-20 05:57:53,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:57:53,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:57:53,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:57:53,995 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:57:53,996 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:57:53,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-10-20 05:57:54,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f633e2fd/e47e5cee8d1d4913bea2abefcc0daded/FLAGae3b52ab6 [2020-10-20 05:57:54,597 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:57:54,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2020-10-20 05:57:54,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f633e2fd/e47e5cee8d1d4913bea2abefcc0daded/FLAGae3b52ab6 [2020-10-20 05:57:54,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f633e2fd/e47e5cee8d1d4913bea2abefcc0daded [2020-10-20 05:57:54,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:57:54,883 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:57:54,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:57:54,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:57:54,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:57:54,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:57:54" (1/1) ... [2020-10-20 05:57:54,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ce402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:54, skipping insertion in model container [2020-10-20 05:57:54,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:57:54" (1/1) ... [2020-10-20 05:57:54,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:57:54,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:57:55,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:57:55,359 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:57:55,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:57:55,467 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:57:55,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55 WrapperNode [2020-10-20 05:57:55,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:57:55,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:57:55,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:57:55,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:57:55,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (1/1) ... [2020-10-20 05:57:55,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:57:55,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:57:55,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:57:55,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:57:55,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (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 [2020-10-20 05:57:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:57:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:57:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 05:57:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:57:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:57:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:57:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:57:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:57:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-20 05:57:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:57:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:57:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 05:57:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-20 05:57:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-20 05:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 05:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:57:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:57:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:57:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:57:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:57:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:57:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:57:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:57:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:57:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:57:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:57:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:57:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:57:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:57:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:57:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:57:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:57:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:57:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:57:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:57:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:57:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:57:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:57:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:57:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:57:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:57:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:57:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:57:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:57:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:57:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:57:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:57:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:57:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:57:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:57:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:57:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:57:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:57:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:57:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:57:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:57:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:57:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:57:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:57:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:57:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:57:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:57:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:57:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:57:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:57:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:57:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:57:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:57:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:57:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:57:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:57:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:57:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:57:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:57:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:57:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:57:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:57:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:57:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:57:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:57:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:57:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:57:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:57:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:57:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:57:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:57:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:57:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:57:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:57:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:57:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:57:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:57:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:57:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:57:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:57:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:57:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:57:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:57:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:57:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:57:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:57:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:57:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:57:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:57:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:57:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:57:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:57:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-20 05:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:57:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 05:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 05:57:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:57:56,257 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:57:56,258 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 05:57:56,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:56 BoogieIcfgContainer [2020-10-20 05:57:56,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:57:56,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:57:56,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:57:56,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:57:56,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:57:54" (1/3) ... [2020-10-20 05:57:56,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579fa1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:57:56, skipping insertion in model container [2020-10-20 05:57:56,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:57:55" (2/3) ... [2020-10-20 05:57:56,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579fa1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:57:56, skipping insertion in model container [2020-10-20 05:57:56,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:56" (3/3) ... [2020-10-20 05:57:56,270 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2020-10-20 05:57:56,283 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:57:56,291 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-20 05:57:56,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-20 05:57:56,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:57:56,329 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:57:56,329 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:57:56,329 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:57:56,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:57:56,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:57:56,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:57:56,330 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:57:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-10-20 05:57:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 05:57:56,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:56,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:56,366 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]=== [2020-10-20 05:57:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash -334073084, now seen corresponding path program 1 times [2020-10-20 05:57:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:56,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785241190] [2020-10-20 05:57:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:56,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:56,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785241190] [2020-10-20 05:57:56,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:57:56,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:57:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894789011] [2020-10-20 05:57:56,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 05:57:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:56,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 05:57:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 05:57:56,740 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-10-20 05:57:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:56,943 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-20 05:57:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 05:57:56,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 05:57:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:56,955 INFO L225 Difference]: With dead ends: 62 [2020-10-20 05:57:56,956 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 05:57:56,957 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 [2020-10-20 05:57:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 05:57:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-20 05:57:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-20 05:57:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-20 05:57:57,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-10-20 05:57:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:57,001 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-20 05:57:57,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 05:57:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-20 05:57:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:57:57,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:57,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:57,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:57:57,004 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]=== [2020-10-20 05:57:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545344, now seen corresponding path program 1 times [2020-10-20 05:57:57,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593153391] [2020-10-20 05:57:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:57,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593153391] [2020-10-20 05:57:57,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:57:57,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:57:57,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916812309] [2020-10-20 05:57:57,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:57:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:57,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:57:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:57:57,151 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-10-20 05:57:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:57,296 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-20 05:57:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:57:57,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 05:57:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:57,298 INFO L225 Difference]: With dead ends: 58 [2020-10-20 05:57:57,298 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 05:57:57,299 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 [2020-10-20 05:57:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 05:57:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-20 05:57:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 05:57:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-20 05:57:57,308 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 10 [2020-10-20 05:57:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:57,308 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-20 05:57:57,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:57:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-20 05:57:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:57:57,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:57,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:57,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:57:57,310 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]=== [2020-10-20 05:57:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545343, now seen corresponding path program 1 times [2020-10-20 05:57:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:57,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67107574] [2020-10-20 05:57:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:57,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67107574] [2020-10-20 05:57:57,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:57:57,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:57:57,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449548805] [2020-10-20 05:57:57,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:57:57,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:57,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:57:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:57:57,433 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2020-10-20 05:57:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:57,666 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-20 05:57:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:57:57,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 05:57:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:57,670 INFO L225 Difference]: With dead ends: 109 [2020-10-20 05:57:57,670 INFO L226 Difference]: Without dead ends: 109 [2020-10-20 05:57:57,670 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 [2020-10-20 05:57:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-20 05:57:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-20 05:57:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-20 05:57:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-20 05:57:57,681 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2020-10-20 05:57:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:57,681 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-20 05:57:57,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:57:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-20 05:57:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 05:57:57,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:57,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:57,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:57:57,683 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]=== [2020-10-20 05:57:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421434, now seen corresponding path program 1 times [2020-10-20 05:57:57,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:57,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618751609] [2020-10-20 05:57:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:57,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618751609] [2020-10-20 05:57:57,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726156347] [2020-10-20 05:57:57,793 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 [2020-10-20 05:57:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 05:57:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:57:58,057 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-20 05:57:58,058 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 [2020-10-20 05:57:58,059 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:57:58,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:57:58,079 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. [2020-10-20 05:57:58,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2020-10-20 05:57:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:58,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:57:58,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-10-20 05:57:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671152216] [2020-10-20 05:57:58,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:57:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:58,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:57:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:57:58,114 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2020-10-20 05:57:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:58,229 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-20 05:57:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:57:58,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-20 05:57:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:58,231 INFO L225 Difference]: With dead ends: 108 [2020-10-20 05:57:58,231 INFO L226 Difference]: Without dead ends: 108 [2020-10-20 05:57:58,232 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 [2020-10-20 05:57:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-20 05:57:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2020-10-20 05:57:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 05:57:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-20 05:57:58,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2020-10-20 05:57:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:58,240 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-20 05:57:58,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:57:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-20 05:57:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 05:57:58,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:58,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:58,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:57:58,455 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]=== [2020-10-20 05:57:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:58,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184100, now seen corresponding path program 1 times [2020-10-20 05:57:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:58,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847449239] [2020-10-20 05:57:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:58,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:58,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847449239] [2020-10-20 05:57:58,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:57:58,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:57:58,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045542340] [2020-10-20 05:57:58,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:57:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:57:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:57:58,590 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-10-20 05:57:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:58,753 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-20 05:57:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:57:58,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-20 05:57:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:58,755 INFO L225 Difference]: With dead ends: 54 [2020-10-20 05:57:58,755 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 05:57:58,755 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 [2020-10-20 05:57:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 05:57:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-20 05:57:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 05:57:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-20 05:57:58,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2020-10-20 05:57:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:58,764 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-20 05:57:58,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:57:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-20 05:57:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 05:57:58,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:58,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:58,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 05:57:58,765 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]=== [2020-10-20 05:57:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:58,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184099, now seen corresponding path program 1 times [2020-10-20 05:57:58,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:58,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898250109] [2020-10-20 05:57:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:58,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:58,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898250109] [2020-10-20 05:57:58,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:57:58,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:57:58,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931283562] [2020-10-20 05:57:58,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:57:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:57:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:57:58,900 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2020-10-20 05:57:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:59,186 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-20 05:57:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:57:59,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-20 05:57:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:59,188 INFO L225 Difference]: With dead ends: 99 [2020-10-20 05:57:59,189 INFO L226 Difference]: Without dead ends: 99 [2020-10-20 05:57:59,189 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 [2020-10-20 05:57:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-20 05:57:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-10-20 05:57:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-20 05:57:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-20 05:57:59,197 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2020-10-20 05:57:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:59,197 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-20 05:57:59,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:57:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-20 05:57:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:57:59,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:59,199 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:59,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 05:57:59,199 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]=== [2020-10-20 05:57:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash 139066936, now seen corresponding path program 1 times [2020-10-20 05:57:59,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:59,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796107985] [2020-10-20 05:57:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:57:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:59,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:57:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796107985] [2020-10-20 05:57:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164573808] [2020-10-20 05:57:59,334 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 [2020-10-20 05:57:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:57:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 05:57:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:57:59,495 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-20 05:57:59,495 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 [2020-10-20 05:57:59,496 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:57:59,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:57:59,512 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. [2020-10-20 05:57:59,513 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-10-20 05:57:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:57:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:57:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-20 05:57:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290376171] [2020-10-20 05:57:59,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:57:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:57:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:57:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:57:59,579 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-10-20 05:57:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:57:59,759 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-10-20 05:57:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:57:59,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-20 05:57:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:57:59,760 INFO L225 Difference]: With dead ends: 104 [2020-10-20 05:57:59,761 INFO L226 Difference]: Without dead ends: 104 [2020-10-20 05:57:59,763 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 [2020-10-20 05:57:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-20 05:57:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-10-20 05:57:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-20 05:57:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-20 05:57:59,777 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2020-10-20 05:57:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:57:59,777 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-20 05:57:59,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:57:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-20 05:57:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 05:57:59,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:57:59,779 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:57:59,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:57:59,980 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]=== [2020-10-20 05:57:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:57:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2134408578, now seen corresponding path program 1 times [2020-10-20 05:57:59,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:57:59,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472956276] [2020-10-20 05:57:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:58:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:58:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:58:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472956276] [2020-10-20 05:58:00,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158754231] [2020-10-20 05:58:00,087 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 [2020-10-20 05:58:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 05:58:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:58:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:58:00,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:58:00,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-20 05:58:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127313638] [2020-10-20 05:58:00,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:58:00,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:58:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:58:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:58:00,224 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 5 states. [2020-10-20 05:58:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:58:00,273 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-10-20 05:58:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:58:00,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-20 05:58:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:58:00,274 INFO L225 Difference]: With dead ends: 97 [2020-10-20 05:58:00,274 INFO L226 Difference]: Without dead ends: 97 [2020-10-20 05:58:00,275 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 [2020-10-20 05:58:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-20 05:58:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-20 05:58:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 05:58:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-20 05:58:00,281 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2020-10-20 05:58:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:58:00,282 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-20 05:58:00,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:58:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-20 05:58:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 05:58:00,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:58:00,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:58:00,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:58:00,497 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]=== [2020-10-20 05:58:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:58:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1700324605, now seen corresponding path program 1 times [2020-10-20 05:58:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:58:00,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157341832] [2020-10-20 05:58:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:58:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:58:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:58:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157341832] [2020-10-20 05:58:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549222131] [2020-10-20 05:58:00,625 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 [2020-10-20 05:58:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 05:58:00,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:58:00,763 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-10-20 05:58:00,763 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 [2020-10-20 05:58:00,764 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:58:00,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:58:00,778 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. [2020-10-20 05:58:00,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-10-20 05:58:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:58:00,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:58:00,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-20 05:58:00,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361582278] [2020-10-20 05:58:00,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 05:58:00,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:58:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 05:58:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:58:00,895 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2020-10-20 05:58:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:58:01,489 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-20 05:58:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:58:01,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-20 05:58:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:58:01,493 INFO L225 Difference]: With dead ends: 112 [2020-10-20 05:58:01,493 INFO L226 Difference]: Without dead ends: 112 [2020-10-20 05:58:01,493 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 [2020-10-20 05:58:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-20 05:58:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-10-20 05:58:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 05:58:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-20 05:58:01,499 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2020-10-20 05:58:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:58:01,500 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-20 05:58:01,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 05:58:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-20 05:58:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 05:58:01,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:58:01,501 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] [2020-10-20 05:58:01,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:58:01,715 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]=== [2020-10-20 05:58:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:58:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash -247582013, now seen corresponding path program 1 times [2020-10-20 05:58:01,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:58:01,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585913447] [2020-10-20 05:58:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:58:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:01,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:58:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:01,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-20 05:58:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:58:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:58:01,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585913447] [2020-10-20 05:58:01,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:58:01,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:58:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977738085] [2020-10-20 05:58:01,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:58:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:58:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:58:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:58:01,788 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-10-20 05:58:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:58:02,019 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-20 05:58:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:58:02,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-20 05:58:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:58:02,020 INFO L225 Difference]: With dead ends: 71 [2020-10-20 05:58:02,020 INFO L226 Difference]: Without dead ends: 71 [2020-10-20 05:58:02,021 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 [2020-10-20 05:58:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-20 05:58:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-20 05:58:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-20 05:58:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-20 05:58:02,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2020-10-20 05:58:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:58:02,028 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-20 05:58:02,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:58:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-20 05:58:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 05:58:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:58:02,031 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] [2020-10-20 05:58:02,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 05:58:02,032 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]=== [2020-10-20 05:58:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:58:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash -247582012, now seen corresponding path program 1 times [2020-10-20 05:58:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:58:02,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322372008] [2020-10-20 05:58:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:58:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:58:02,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:58:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:58:02,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:58:02,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 05:58:02,120 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 05:58:02,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 05:58:02,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:58:02 BoogieIcfgContainer [2020-10-20 05:58:02,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 05:58:02,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 05:58:02,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 05:58:02,183 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 05:58:02,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:57:56" (3/4) ... [2020-10-20 05:58:02,186 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 05:58:02,279 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 05:58:02,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 05:58:02,281 INFO L168 Benchmark]: Toolchain (without parser) took 7403.59 ms. Allocated memory was 34.1 MB in the beginning and 91.2 MB in the end (delta: 57.1 MB). Free memory was 6.5 MB in the beginning and 21.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 41.8 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,282 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory is still 12.5 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 05:58:02,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 583.93 ms. Allocated memory was 34.1 MB in the beginning and 45.1 MB in the end (delta: 11.0 MB). Free memory was 5.6 MB in the beginning and 14.9 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,283 INFO L168 Benchmark]: Boogie Preprocessor took 96.62 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 14.9 MB in the beginning and 28.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,284 INFO L168 Benchmark]: RCFGBuilder took 695.46 ms. Allocated memory was 46.7 MB in the beginning and 50.3 MB in the end (delta: 3.7 MB). Free memory was 28.3 MB in the beginning and 21.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,285 INFO L168 Benchmark]: TraceAbstraction took 5909.11 ms. Allocated memory was 50.3 MB in the beginning and 91.2 MB in the end (delta: 40.9 MB). Free memory was 20.7 MB in the beginning and 24.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,286 INFO L168 Benchmark]: Witness Printer took 97.67 ms. Allocated memory is still 91.2 MB. Free memory was 24.3 MB in the beginning and 21.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. [2020-10-20 05:58:02,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 33.6 MB. Free memory is still 12.5 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 583.93 ms. Allocated memory was 34.1 MB in the beginning and 45.1 MB in the end (delta: 11.0 MB). Free memory was 5.6 MB in the beginning and 14.9 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 96.62 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 14.9 MB in the beginning and 28.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 695.46 ms. Allocated memory was 46.7 MB in the beginning and 50.3 MB in the end (delta: 3.7 MB). Free memory was 28.3 MB in the beginning and 21.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5909.11 ms. Allocated memory was 50.3 MB in the beginning and 91.2 MB in the end (delta: 40.9 MB). Free memory was 20.7 MB in the beginning and 24.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 14.3 GB. * Witness Printer took 97.67 ms. Allocated memory is still 91.2 MB. Free memory was 24.3 MB in the beginning and 21.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=53, \old(a)=56, \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] = 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] [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[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 558 SDtfs, 836 SDslu, 760 SDs, 0 SdLazy, 1083 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 21313 SizeOfPredicates, 16 NumberOfNonLiveVariables, 650 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 10/21 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...