./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 981f9605b8ccc487ab91eaf7b6ca746d6b73f5da ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:55:26,532 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:55:26,533 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:55:26,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:55:26,540 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:55:26,541 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:55:26,541 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:55:26,543 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:55:26,544 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:55:26,545 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:55:26,545 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:55:26,545 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:55:26,546 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:55:26,547 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:55:26,547 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:55:26,548 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:55:26,548 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:55:26,549 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:55:26,550 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:55:26,551 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:55:26,552 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:55:26,553 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:55:26,554 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:55:26,555 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:55:26,555 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:55:26,555 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:55:26,556 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:55:26,556 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:55:26,557 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:55:26,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:55:26,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:55:26,558 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:55:26,558 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:55:26,558 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:55:26,559 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:55:26,559 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:55:26,559 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 09:55:26,569 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:55:26,569 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:55:26,570 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:55:26,570 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 09:55:26,571 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 09:55:26,571 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 09:55:26,571 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 09:55:26,571 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:55:26,571 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:55:26,571 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:55:26,572 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:55:26,573 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:55:26,573 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:55:26,574 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:55:26,574 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer 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 ! call(__VERIFIER_error())) ) 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 -> 981f9605b8ccc487ab91eaf7b6ca746d6b73f5da [2018-11-18 09:55:26,599 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:55:26,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:55:26,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:55:26,612 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:55:26,612 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:55:26,613 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-18 09:55:26,656 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/data/d445362d1/32ef8eb352bc4f659ad4e45140334fa3/FLAG80330f03d [2018-11-18 09:55:27,039 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:55:27,040 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-18 09:55:27,049 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/data/d445362d1/32ef8eb352bc4f659ad4e45140334fa3/FLAG80330f03d [2018-11-18 09:55:27,059 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/data/d445362d1/32ef8eb352bc4f659ad4e45140334fa3 [2018-11-18 09:55:27,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:55:27,062 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 09:55:27,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:55:27,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:55:27,065 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:55:27,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0670bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27, skipping insertion in model container [2018-11-18 09:55:27,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:55:27,105 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:55:27,312 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:55:27,319 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:55:27,350 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:55:27,433 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:55:27,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27 WrapperNode [2018-11-18 09:55:27,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:55:27,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:55:27,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:55:27,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:55:27,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... [2018-11-18 09:55:27,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:55:27,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:55:27,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:55:27,474 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:55:27,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/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 [2018-11-18 09:55:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:55:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:55:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure exit [2018-11-18 09:55:27,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2018-11-18 09:55:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2018-11-18 09:55:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure select [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure random [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2018-11-18 09:55:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2018-11-18 09:55:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2018-11-18 09:55:27,520 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2018-11-18 09:55:27,521 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2018-11-18 09:55:27,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure __secure_getenv [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2018-11-18 09:55:27,523 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure system [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2018-11-18 09:55:27,524 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure div [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2018-11-18 09:55:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2018-11-18 09:55:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 09:55:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 09:55:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 09:55:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:55:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:55:27,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 09:55:27,789 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:55:27,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:55:27 BoogieIcfgContainer [2018-11-18 09:55:27,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:55:27,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:55:27,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:55:27,793 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:55:27,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:55:27" (1/3) ... [2018-11-18 09:55:27,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512e8612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:55:27, skipping insertion in model container [2018-11-18 09:55:27,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:55:27" (2/3) ... [2018-11-18 09:55:27,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512e8612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:55:27, skipping insertion in model container [2018-11-18 09:55:27,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:55:27" (3/3) ... [2018-11-18 09:55:27,795 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-18 09:55:27,801 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:55:27,806 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:55:27,819 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:55:27,839 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:55:27,839 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:55:27,840 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:55:27,840 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:55:27,840 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:55:27,840 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:55:27,840 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:55:27,840 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:55:27,840 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:55:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-11-18 09:55:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 09:55:27,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:55:27,855 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:55:27,857 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:55:27,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:55:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1673529273, now seen corresponding path program 1 times [2018-11-18 09:55:27,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:55:27,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:55:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:27,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:55:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:55:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:55:27,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:55:27,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:55:27,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 09:55:27,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 09:55:27,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:55:27,967 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2018-11-18 09:55:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:55:27,983 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2018-11-18 09:55:27,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 09:55:27,984 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-11-18 09:55:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:55:27,991 INFO L225 Difference]: With dead ends: 57 [2018-11-18 09:55:27,991 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 09:55:27,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:55:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 09:55:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-18 09:55:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 09:55:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-11-18 09:55:28,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2018-11-18 09:55:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:55:28,018 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-11-18 09:55:28,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 09:55:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-11-18 09:55:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 09:55:28,019 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:55:28,019 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:55:28,019 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:55:28,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:55:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1336387516, now seen corresponding path program 1 times [2018-11-18 09:55:28,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:55:28,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:55:28,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:55:28,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:55:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:55:28,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:55:28,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 09:55:28,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:55:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:55:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:55:28,064 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-11-18 09:55:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:55:28,083 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2018-11-18 09:55:28,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:55:28,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-18 09:55:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:55:28,084 INFO L225 Difference]: With dead ends: 57 [2018-11-18 09:55:28,084 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 09:55:28,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:55:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 09:55:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-11-18 09:55:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 09:55:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-11-18 09:55:28,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2018-11-18 09:55:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:55:28,089 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-11-18 09:55:28,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:55:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-11-18 09:55:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 09:55:28,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:55:28,089 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:55:28,090 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:55:28,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:55:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1336380572, now seen corresponding path program 1 times [2018-11-18 09:55:28,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:55:28,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:55:28,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:55:28,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:55:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:55:28,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:55:28,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:55:28,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:55:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:55:28,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:55:28,157 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2018-11-18 09:55:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:55:28,229 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2018-11-18 09:55:28,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:55:28,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-11-18 09:55:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:55:28,230 INFO L225 Difference]: With dead ends: 70 [2018-11-18 09:55:28,231 INFO L226 Difference]: Without dead ends: 52 [2018-11-18 09:55:28,231 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:55:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-18 09:55:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2018-11-18 09:55:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 09:55:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2018-11-18 09:55:28,237 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 18 [2018-11-18 09:55:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:55:28,237 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2018-11-18 09:55:28,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:55:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2018-11-18 09:55:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 09:55:28,238 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:55:28,238 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:55:28,238 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:55:28,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:55:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1570857321, now seen corresponding path program 1 times [2018-11-18 09:55:28,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:55:28,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:55:28,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:55:28,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:55:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:55:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:55:28,282 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 09:55:28,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:55:28 BoogieIcfgContainer [2018-11-18 09:55:28,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:55:28,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:55:28,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:55:28,303 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:55:28,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:55:27" (3/4) ... [2018-11-18 09:55:28,305 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 09:55:28,341 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_deeba977-6fe4-4866-b015-6b7b9dc95bc0/bin-2019/uautomizer/witness.graphml [2018-11-18 09:55:28,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:55:28,341 INFO L168 Benchmark]: Toolchain (without parser) took 1279.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 957.6 MB in the beginning and 1.0 GB in the end (delta: -71.7 MB). Peak memory consumption was 72.5 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,343 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:55:28,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 957.6 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,343 INFO L168 Benchmark]: Boogie Preprocessor took 40.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,344 INFO L168 Benchmark]: RCFGBuilder took 315.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,344 INFO L168 Benchmark]: TraceAbstraction took 512.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,345 INFO L168 Benchmark]: Witness Printer took 38.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:55:28,347 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 370.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 957.6 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 315.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 512.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 11.5 GB. * Witness Printer took 38.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 668]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = 1; [L628] EXPR, FCALL malloc(sizeof(struct node)) [L628] List a = (List) malloc(sizeof(struct node)); VAL [a={10:0}, flag=1, malloc(sizeof(struct node))={10:0}] [L629] COND FALSE !(a == 0) VAL [a={10:0}, flag=1, malloc(sizeof(struct node))={10:0}] [L630] List t; [L631] List p = a; VAL [a={10:0}, flag=1, malloc(sizeof(struct node))={10:0}, p={10:0}] [L632] COND TRUE __VERIFIER_nondet_int() [L633] COND TRUE \read(flag) [L634] FCALL p->h = 2 [L635] flag = 0 VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={10:0}, p={10:0}] [L640] EXPR, FCALL malloc(sizeof(struct node)) [L640] t = (List) malloc(sizeof(struct node)) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] [L641] COND FALSE !(t == 0) VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] [L642] FCALL p->n = t [L643] EXPR, FCALL p->n [L643] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L645] FCALL p->h = 3 [L646] p = a [L647] flag = 1 VAL [a={10:0}, flag=1, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] [L648] EXPR, FCALL p->h VAL [a={10:0}, flag=1, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, p->h=2, t={12:0}] [L648] COND TRUE p->h != 3 [L649] COND TRUE \read(flag) [L650] flag = 0 [L651] EXPR, FCALL p->h VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, p->h=2, t={12:0}] [L651] COND TRUE p->h != 1 [L668] __VERIFIER_error() VAL [a={10:0}, flag=0, malloc(sizeof(struct node))={12:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, t={12:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. UNSAFE Result, 0.4s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 27 SDslu, 79 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 1585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...