./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s4liff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0971d3f4e504a4d4e0b12e06b99b350fdf7a353d ............................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-5709675 [2021-10-15 19:18:34,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:18:34,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:18:34,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:18:34,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:18:34,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:18:34,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:18:34,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:18:34,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:18:34,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:18:34,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:18:34,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:18:34,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:18:34,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:18:34,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:18:34,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:18:34,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:18:34,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:18:34,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:18:34,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:18:34,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:18:34,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:18:34,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:18:34,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:18:34,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:18:34,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:18:34,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:18:34,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:18:34,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:18:34,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:18:34,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:18:34,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:18:34,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:18:34,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:18:34,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:18:34,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:18:34,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:18:34,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:18:34,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:18:34,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:18:34,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:18:34,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:18:34,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:18:34,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:18:34,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:18:34,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:18:34,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:18:34,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:18:34,861 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:18:34,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:18:34,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:18:34,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:18:34,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:18:34,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:18:34,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:18:34,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:18:34,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:18:34,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:18:34,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:18:34,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:18:34,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:18:34,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:18:34,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:18:34,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:18:34,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:18:34,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:18:34,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:18:34,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:18:34,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:18:34,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:18:34,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:18:34,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:18:34,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:18:34,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:18:34,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0971d3f4e504a4d4e0b12e06b99b350fdf7a353d [2021-10-15 19:18:35,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:18:35,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:18:35,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:18:35,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:18:35,195 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:18:35,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-fpi/s4liff.c [2021-10-15 19:18:35,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/data/56d3b6e1e/51cdae99b9f74bf0bd492f24cdf497d8/FLAG327cd6c16 [2021-10-15 19:18:35,714 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:18:35,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/sv-benchmarks/c/array-fpi/s4liff.c [2021-10-15 19:18:35,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/data/56d3b6e1e/51cdae99b9f74bf0bd492f24cdf497d8/FLAG327cd6c16 [2021-10-15 19:18:36,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/data/56d3b6e1e/51cdae99b9f74bf0bd492f24cdf497d8 [2021-10-15 19:18:36,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:18:36,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:18:36,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:18:36,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:18:36,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:18:36,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92cdf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36, skipping insertion in model container [2021-10-15 19:18:36,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:18:36,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:18:36,338 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/sv-benchmarks/c/array-fpi/s4liff.c[589,602] [2021-10-15 19:18:36,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:18:36,393 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:18:36,408 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/sv-benchmarks/c/array-fpi/s4liff.c[589,602] [2021-10-15 19:18:36,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:18:36,448 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:18:36,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36 WrapperNode [2021-10-15 19:18:36,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:18:36,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:18:36,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:18:36,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:18:36,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:18:36,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:18:36,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:18:36,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:18:36,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:18:36,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:18:36,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:18:36,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:18:36,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (1/1) ... [2021-10-15 19:18:36,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:18:36,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:18:36,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:18:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:18:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:18:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:18:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:18:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:18:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:18:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:18:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:18:36,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:18:36,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:18:36,930 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-15 19:18:36,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:18:36 BoogieIcfgContainer [2021-10-15 19:18:36,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:18:36,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:18:36,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:18:36,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:18:36,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:18:36" (1/3) ... [2021-10-15 19:18:36,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615bb06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:18:36, skipping insertion in model container [2021-10-15 19:18:36,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:18:36" (2/3) ... [2021-10-15 19:18:36,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615bb06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:18:36, skipping insertion in model container [2021-10-15 19:18:36,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:18:36" (3/3) ... [2021-10-15 19:18:36,955 INFO L111 eAbstractionObserver]: Analyzing ICFG s4liff.c [2021-10-15 19:18:36,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:18:36,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:18:37,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:18:37,046 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:18:37,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:18:37,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 22 places, 31 transitions, 62 flow [2021-10-15 19:18:37,094 INFO L129 PetriNetUnfolder]: 10/31 cut-off events. [2021-10-15 19:18:37,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:18:37,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 31 events. 10/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 19:18:37,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 31 transitions, 62 flow [2021-10-15 19:18:37,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 25 transitions, 50 flow [2021-10-15 19:18:37,105 INFO L129 PetriNetUnfolder]: 8/24 cut-off events. [2021-10-15 19:18:37,106 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:18:37,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:18:37,106 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:18:37,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:18:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:18:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -923568332, now seen corresponding path program 1 times [2021-10-15 19:18:37,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:18:37,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827760067] [2021-10-15 19:18:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:18:37,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:18:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:18:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:18:37,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:18:37,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827760067] [2021-10-15 19:18:37,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827760067] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:18:37,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:18:37,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:18:37,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778440247] [2021-10-15 19:18:37,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:18:37,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:18:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:18:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:18:37,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2021-10-15 19:18:37,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 25 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:37,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:18:37,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2021-10-15 19:18:37,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:18:37,558 INFO L129 PetriNetUnfolder]: 5/29 cut-off events. [2021-10-15 19:18:37,558 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:18:37,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 29 events. 5/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-10-15 19:18:37,560 INFO L132 encePairwiseOnDemand]: 17/31 looper letters, 19 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-10-15 19:18:37,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 29 transitions, 110 flow [2021-10-15 19:18:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:18:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:18:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2021-10-15 19:18:37,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2021-10-15 19:18:37,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 64 transitions. [2021-10-15 19:18:37,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 64 transitions. [2021-10-15 19:18:37,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:18:37,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 64 transitions. [2021-10-15 19:18:37,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:37,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:37,592 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:37,594 INFO L186 Difference]: Start difference. First operand has 18 places, 25 transitions, 50 flow. Second operand 4 states and 64 transitions. [2021-10-15 19:18:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 29 transitions, 110 flow [2021-10-15 19:18:37,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:18:37,605 INFO L242 Difference]: Finished difference. Result has 22 places, 24 transitions, 80 flow [2021-10-15 19:18:37,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=22, PETRI_TRANSITIONS=24} [2021-10-15 19:18:37,609 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 4 predicate places. [2021-10-15 19:18:37,610 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 24 transitions, 80 flow [2021-10-15 19:18:37,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:37,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:18:37,611 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:18:37,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:18:37,612 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:18:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:18:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-10-15 19:18:37,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:18:37,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242623475] [2021-10-15 19:18:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:18:37,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:18:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:18:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:18:37,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:18:37,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242623475] [2021-10-15 19:18:37,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242623475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:18:37,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706282877] [2021-10-15 19:18:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:18:37,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:18:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:18:37,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:18:37,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:18:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:18:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:18:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:18:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:18:38,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:18:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:18:38,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706282877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:18:38,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:18:38,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-15 19:18:38,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478449826] [2021-10-15 19:18:38,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:18:38,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:18:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:18:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:18:38,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2021-10-15 19:18:38,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 24 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:38,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:18:38,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2021-10-15 19:18:38,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:18:38,292 INFO L129 PetriNetUnfolder]: 4/28 cut-off events. [2021-10-15 19:18:38,293 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:18:38,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 12. Up to 16 conditions per place. [2021-10-15 19:18:38,295 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 16 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2021-10-15 19:18:38,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 132 flow [2021-10-15 19:18:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:18:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:18:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2021-10-15 19:18:38,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2021-10-15 19:18:38,306 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 77 transitions. [2021-10-15 19:18:38,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 77 transitions. [2021-10-15 19:18:38,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:18:38,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 77 transitions. [2021-10-15 19:18:38,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:38,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:38,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:38,313 INFO L186 Difference]: Start difference. First operand has 22 places, 24 transitions, 80 flow. Second operand 6 states and 77 transitions. [2021-10-15 19:18:38,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 132 flow [2021-10-15 19:18:38,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:18:38,318 INFO L242 Difference]: Finished difference. Result has 28 places, 27 transitions, 110 flow [2021-10-15 19:18:38,319 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2021-10-15 19:18:38,319 INFO L334 CegarLoopForPetriNet]: 18 programPoint places, 10 predicate places. [2021-10-15 19:18:38,319 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 110 flow [2021-10-15 19:18:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:18:38,320 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:18:38,320 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:18:38,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:18:38,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 19:18:38,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:18:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:18:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-10-15 19:18:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:18:38,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806782989] [2021-10-15 19:18:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:18:38,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:18:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:18:38,592 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:18:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:18:38,686 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:18:38,687 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:18:38,688 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:18:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:18:38,699 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:18:38,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:18:38 BoogieIcfgContainer [2021-10-15 19:18:38,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:18:38,761 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:18:38,761 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:18:38,762 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:18:38,762 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:18:36" (3/4) ... [2021-10-15 19:18:38,763 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:18:38,807 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6172282-2b09-4b8d-b6a4-7e689622204b/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:18:38,807 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:18:38,809 INFO L168 Benchmark]: Toolchain (without parser) took 2694.81 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 55.7 MB in the beginning and 64.0 MB in the end (delta: -8.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,810 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:18:38,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.39 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 55.5 MB in the beginning and 90.8 MB in the end (delta: -35.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.93 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,812 INFO L168 Benchmark]: Boogie Preprocessor took 28.51 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 88.1 MB in the end (delta: 984.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,813 INFO L168 Benchmark]: RCFGBuilder took 427.90 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 77.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,813 INFO L168 Benchmark]: TraceAbstraction took 1813.18 ms. Allocated memory is still 115.3 MB. Free memory was 76.5 MB in the beginning and 66.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,814 INFO L168 Benchmark]: Witness Printer took 45.96 ms. Allocated memory is still 115.3 MB. Free memory was 66.1 MB in the beginning and 64.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:18:38,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.39 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 55.5 MB in the beginning and 90.8 MB in the end (delta: -35.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.93 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.51 ms. Allocated memory is still 115.3 MB. Free memory was 89.1 MB in the beginning and 88.1 MB in the end (delta: 984.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 427.90 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 77.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1813.18 ms. Allocated memory is still 115.3 MB. Free memory was 76.5 MB in the beginning and 66.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Witness Printer took 45.96 ms. Allocated memory is still 115.3 MB. Free memory was 66.1 MB in the beginning and 64.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = N [L32] i=0 VAL [N=1] [L32] COND TRUE i